Power supply system

Abstract

The utility model discloses a power supply system, which comprises a plurality of battery packs, each battery pack is provided with a discharge interface and a charge interface, and the discharge interface and the charge interface are respectively connected with the positive electrode and the negative electrode of the battery pack; at least one one-way conduction element is connected in series between the discharge interface and the anode of the battery pack and / or between the discharge interface and the cathode of the battery pack, and the current conduction direction of the one-way conduction element is that the current flows into the cathode of the battery pack or flows out of the anode of the battery pack; the discharge interfaces of the battery packs are connected in parallel to form a total discharge interface for external power supply; according to the power supply system, the occupied space of the power supply system can be saved, the consistency of voltage and electric quantity states of the battery packs is ensured, the consistency of batteries is improved, the situation of mutual current charging is avoided, and the use performance of the power supply system is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, specifically a power supply system. Background Technology

[0002] With the rapid development of the new energy industry, power supply systems are being used more and more widely in many industries. In practical applications, due to usage requirements, a power supply system often involves multiple battery packs connected in parallel. However, it is difficult to keep the voltage and state of charge of different battery packs completely consistent. When battery packs are connected in parallel, the battery pack with higher voltage will charge the battery pack with lower voltage, causing current to flow between the batteries, affecting system performance. Moreover, the greater the voltage difference, the greater the current, and it may even damage components. Therefore, before connecting battery packs in parallel, it is necessary to adjust the state of different battery packs to make their voltage and charge basically consistent.

[0003] In existing technologies, adding a voltage regulator to adjust the voltage of each battery pack to be nearly identical before parallel connection avoids current leakage caused by voltage inconsistencies, but significantly increases the size, weight, and control complexity of the power system, reducing reliability, especially unsuitable for confined spaces. Furthermore, if the power system lacks automatic voltage and charge adjustment for each battery pack, the state of charge of different batteries must be manually adjusted to be consistent before installation, a time-consuming and labor-intensive process that cannot meet emergency requirements. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a power supply system that can save the space occupied by the power supply system, while ensuring that the voltage and charge status of each battery pack are consistent, improving battery consistency, avoiding the situation of current mutual charging, and effectively solving the problems in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a power supply system comprising multiple battery packs, each battery pack being equipped with a discharge interface and a charging interface, wherein the discharge interface and the charging interface are respectively connected to the positive and negative terminals of the battery pack;

[0006] At least one unidirectional conducting element is connected in series between the discharge interface and the positive terminal of the battery pack and / or between the discharge interface and the negative terminal of the battery pack. The current conduction direction of the unidirectional conducting element is either flowing into the negative terminal of the battery pack or flowing out of the positive terminal of the battery pack.

[0007] The discharge interfaces of each battery pack are connected in parallel to form a main discharge interface, which is used to supply power to the outside.

[0008] Each battery pack has an independent charging port, which is used to connect to charging equipment for charging.

[0009] As a preferred embodiment of this utility model, it also includes a control module. The unidirectional conduction element is installed inside the control module. The battery pack is an independent module and includes a battery pack interface. The battery pack is connected to the control module through the battery pack interface.

[0010] As a preferred technical solution of this utility model, the control module further includes a controller, which includes a voltage detection unit, a current detection unit and a switch. The positive and negative terminals of the voltage detection unit are connected to the positive and negative terminals of the battery pack, respectively. The current detection unit is installed at the positive or negative terminal of the battery pack. The switch is connected in series between the positive parallel terminal and the negative parallel terminal of the battery pack discharge interface and the main discharge interface.

[0011] As a preferred embodiment of this utility model, the control module further includes a communication unit and a communication interface, wherein the communication unit is connected to a host computer, a load, or a charging device through the communication interface.

[0012] As a preferred embodiment of this utility model, the battery pack interface further includes a maintenance terminal, which is connected to the positive and negative terminals of each individual battery cell in the battery pack.

[0013] As a preferred embodiment of this utility model, it also includes a charging device, which has multiple charging channels, each of which is connected to the charging interface of a battery pack.

[0014] In a preferred embodiment of this invention, the unidirectional conducting element is a diode.

[0015] Compared with the prior art, the beneficial effects of this utility model are: (1) This power system connects to the outside by setting a unidirectional conducting element in the discharge circuit of each battery pack, avoiding the current mutual sinking caused by inconsistent voltage when multiple battery packs are connected in parallel. Moreover, the unidirectional conducting element can be a simple component such as a diode, which greatly saves space; (2) Each battery pack charging circuit is independently connected to the outside without setting a unidirectional conducting element. The external charging equipment can selectively charge each battery pack individually or charge multiple battery packs at the same time, which has strong flexibility. By adjusting, it can ensure that the voltage, power and other states of each battery pack are consistent, improve battery consistency and enhance system performance. Attached Figure Description

[0016] Figure 1 The circuit diagram shows that both the positive and negative terminals of the battery pack have unidirectional conducting elements connected in series.

[0017] Figure 2 This is a circuit diagram showing a unidirectional conducting element connected in series only at the positive terminal of the battery pack.

[0018] Figure 3 This is a circuit diagram showing a unidirectional conducting element connected in series only at the negative terminal of the battery pack. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0020] Example 1: Please refer to Figure 1 This utility model provides a technical solution: a power system including multiple battery packs, each battery pack being equipped with a discharge interface and a charging interface, the discharge interface and the charging interface being connected to the positive and negative terminals of the battery pack respectively;

[0021] A unidirectional conducting element is connected in series between the discharge port and the positive terminal of the battery pack and between the discharge port and the negative terminal of the battery pack. The current conduction direction of the unidirectional conducting element is either flowing into the negative terminal of the battery pack or flowing out of the positive terminal of the battery pack. By setting the unidirectional conducting element to be connected to the outside, the current mutual sinking caused by the voltage inconsistency when multiple battery packs are connected in parallel can be avoided. Preferably, the unidirectional conducting element is a diode, which can save space.

[0022] The discharge interfaces of each battery pack are connected in parallel to form a main discharge interface, which is used to supply power to the outside.

[0023] Each battery pack has an independent charging interface for connecting to a charging device. The charging device has multiple charging channels, each of which is connected to the charging interface of one battery pack for charging. The external charging device can selectively charge each battery pack individually or charge multiple battery packs simultaneously, providing great flexibility. By adjusting the settings, the voltage, charge, and other states of each battery pack can be kept consistent.

[0024] To improve the safety of the power system, a unidirectional conduction element is installed inside the control module. The battery pack is an independent module with a battery pack interface. The battery pack is connected to the control module through the battery pack interface. The control module includes a controller, which includes a voltage detection unit, a current detection unit, and a switch. The positive and negative terminals of the voltage detection unit are connected to the positive and negative terminals of the battery pack, respectively. The current detection unit is installed at either the positive or negative terminal of the battery pack. The switch is connected in series between the positive parallel terminal of the battery pack discharge interface and the negative parallel terminal of the battery pack discharge interface and the main discharge interface. The controller detects and controls the state of the switch based on the voltage and current information of the battery pack to achieve overvoltage protection, undervoltage protection, and overcurrent protection.

[0025] To enable multi-functional control of the power system, the control module also includes a communication unit and a communication interface. The communication unit is connected to the host computer, load, or charging device through the communication interface for information exchange, real-time uploading of battery information, and execution of corresponding functions according to received instructions.

[0026] The battery pack interface also includes maintenance terminals, which are connected to the positive and negative terminals of each individual cell in the battery pack for monitoring and maintaining the battery pack's status.

[0027] Example 2: As Figure 2 The difference from Example 1 is that only a unidirectional conduction element is connected in series between the discharge interface and the positive terminal of the battery pack.

[0028] Example 3: As Figure 3 The difference from Example 1 is that only a unidirectional conduction element is connected in series between the discharge interface and the negative terminal of the battery pack.

[0029] This invention achieves the goals of preventing mutual charging of battery packs in a small space, eliminating the need for load adjustment when connecting parallel battery packs, facilitating convenient battery pack replacement, and enabling flexible and efficient charging by setting a unidirectional conduction element before each battery pack is connected in parallel and an independent charging circuit. This greatly improves the performance of the power system.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A power supply system, characterized in that: It includes multiple battery packs, each equipped with a discharge port and a charging port, which are respectively connected to the positive and negative terminals of the battery pack; At least one unidirectional conducting element is connected in series between the discharge interface and the positive terminal of the battery pack and / or between the discharge interface and the negative terminal of the battery pack. The current conduction direction of the unidirectional conducting element is either flowing into the negative terminal of the battery pack or flowing out of the positive terminal of the battery pack. The discharge interfaces of each battery pack are connected in parallel to form a main discharge interface, which is used to supply power to the outside. Each battery pack has an independent charging port, which is used to connect to charging equipment for charging.

2. The power supply system according to claim 1, characterized in that: It also includes a control module, the unidirectional conduction element is installed inside the control module, the battery pack is an independent module, it includes a battery pack interface, and the battery pack is connected to the control module through the battery pack interface.

3. A power supply system according to claim 2, characterized in that: The control module also includes a controller, which includes a voltage detection unit, a current detection unit, and a switch. The positive and negative terminals of the voltage detection unit are connected to the positive and negative terminals of the battery pack, respectively. The current detection unit is installed at either the positive or negative terminal of the battery pack. The switch is connected in series between the positive parallel terminal and the negative parallel terminal of the battery pack discharge interface and the main discharge interface.

4. A power supply system according to claim 2, characterized in that: The control module also includes a communication unit and a communication interface. The communication unit is connected to a host computer, a load, or a charging device through the communication interface.

5. A power supply system according to claim 2, characterized in that: The battery pack interface also includes maintenance terminals, which are connected to the positive and negative terminals of each individual cell in the battery pack.

6. A power supply system according to claim 1, characterized in that: It also includes a charging device having multiple charging channels, each of which is connected to a charging interface of a battery pack.

7. A power supply system according to claim 1, characterized in that: The unidirectional conducting element is a diode.

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