Battery system

Abstract

The utility model relates to a battery system, which comprises a battery module, a battery management system, an activation charging interface, a charging starting switch and a direct current-direct current converter, in the battery system, when a battery is in a 0V or extremely low voltage state, the activation charging interface connected with an external power supply charges the battery module by closing the charging starting switch, and in addition, the direct current-direct current converter is connected with the battery management system. A DC-DC converter converts a first voltage input from the activation power supply interface into a second voltage to supply power to the battery management system, so that the battery management system is powered on and started, and when the collected real-time electric quantity of the battery module is greater than or equal to the preset electric quantity, the power supply starting switch is controlled to be switched off; therefore, when the battery is in a 0V or extremely low voltage state, the battery module in the battery system can be normally charged, so that the battery management system in the battery system can be electrified and started, and the charging starting switch is controlled according to the real-time electric quantity of the battery module to prevent the battery module from being overcharged.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery system. Background Technology

[0002] Battery systems can store electrical energy. The core component of a battery system is the battery. If the battery voltage is too high during long-term storage or transportation, it will affect the battery's lifespan or pose a transportation safety risk. Therefore, before long-term storage or transportation, batteries are generally discharged to 0V or an extremely low voltage (such as 0.5V).

[0003] When the battery system needs to be used, the battery management system (BMS) in the battery system is in a shutdown state and cannot work because the battery is in a 0V or extremely low voltage state, resulting in the battery system not receiving power.

[0004] Therefore, how to power a battery system when the battery is at 0V or extremely low voltage is a technical problem that urgently needs to be solved by those in the field. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the purpose of this application is to provide a battery system. The battery system provided by this application enables the battery module in the battery system to be charged normally when the battery is in a 0V or extremely low voltage state, so that the battery management system in the battery system can be powered on and start up, and control the charging start switch according to the real-time power of the battery module to prevent the battery module from being overcharged.

[0006] The technical solution provided in this application is as follows:

[0007] A battery system includes: a battery module, a battery management system, an activation and charging interface, a charging start switch, and a DC-DC converter;

[0008] The input terminal of the activation power interface is used to connect to an external power source;

[0009] The positive output terminal of the activation charging interface is connected to the positive terminal of the battery module and the positive input terminal of the DC-DC converter;

[0010] The negative output terminal of the activation power-up interface is connected to the input terminal of the power-up start switch;

[0011] The output terminal of the power-on switch is connected to the negative terminal of the battery module and the negative input terminal of the DC-DC converter.

[0012] The output terminal of the DC-DC converter is connected to the power input terminal of the battery management system;

[0013] The first control terminal of the battery management system is connected to the control terminal of the charging start switch;

[0014] The power-up start switch is used to output the first voltage input from the power-up activation interface to the battery module and the DC-DC converter when closed;

[0015] The DC-DC converter is used to receive the first voltage, convert the first voltage into a second voltage, and output it to the battery management system.

[0016] The battery management system starts upon receiving the second voltage and collects the real-time power level of the battery module. When the collected real-time power level is greater than or equal to the preset power level, it controls the charging start switch to disconnect.

[0017] Optionally, it also includes: a unidirectional conduction device;

[0018] The positive output terminal of the activation charging interface is connected to the positive terminal of the battery module and the positive terminal of the unidirectional conduction device;

[0019] The negative terminal of the unidirectional conducting device is connected to the positive input terminal of the DC-DC converter.

[0020] Optionally, the unidirectional conducting device is a diode.

[0021] Optionally, it may also include: a first fuse;

[0022] The positive output terminal of the activation power interface is connected to the first terminal of the first fuse;

[0023] The second end of the first fuse is connected to the positive terminal of the battery module and the positive terminal of the unidirectional conduction device.

[0024] Optionally, it also includes: a main positive relay, a positive output interface, and a negative output interface;

[0025] The first contact of the main positive relay is connected to the positive terminal of the battery module, the second terminal of the first fuse, and the positive terminal of the unidirectional conducting device;

[0026] The second contact of the main positive relay is connected to the positive output interface;

[0027] The coil of the main positive relay is connected to the second control terminal of the battery management system;

[0028] The negative terminal of the battery module is connected to the output terminal of the power-on switch, the negative input terminal of the DC-DC converter, and the negative output interface.

[0029] Optionally, it may also include: a second fuse;

[0030] The first end of the second fuse is connected to the positive terminal of the battery module;

[0031] The second end of the second fuse is connected to the positive terminal of the unidirectional conducting device, the second end of the first fuse, and the first contact of the main positive relay.

[0032] Optionally, the battery module includes multiple sodium-ion batteries;

[0033] Multiple sodium-ion batteries may be connected in series or in parallel.

[0034] Optionally, it may also include: a communication interface;

[0035] The communication terminal of the battery management system is connected to the communication interface.

[0036] Compared with the prior art, this application provides a battery system comprising: a battery module, a battery management system, an activation and charging interface, a charging start switch, and a DC-DC converter; the input terminal of the activation and charging interface is used to connect to an external power source; the positive output terminal of the activation and charging interface is connected to the positive terminal of the battery module and the positive input terminal of the DC-DC converter; the negative output terminal of the activation and charging interface is connected to the input terminal of the charging start switch; the output terminal of the charging start switch is connected to the negative terminal of the battery module and the negative input terminal of the DC-DC converter; the output terminal of the DC-DC converter is connected to the power input terminal of the battery management system; the first control terminal of the battery management system is connected to the control terminal of the charging start switch; the charging start switch, when closed, outputs a first voltage input from the activation and charging interface to the battery module and the DC-DC converter; the DC-DC converter receives the first voltage, converts the first voltage into a second voltage, and outputs it to... A battery management system (BMS) is disclosed. The BMS activates upon receiving a second voltage and collects the real-time battery level of the battery module. When the collected real-time battery level is greater than or equal to a preset battery level, it controls the charging start switch to disconnect. In this application, when the battery is at 0V or extremely low voltage, the charging start switch is closed, allowing the activation charging interface connected to an external power source to charge the battery module. Furthermore, a DC-DC converter converts the first voltage input from the activation charging interface into a second voltage to power the BMS, enabling it to start. When the collected real-time battery level of the battery module is greater than or equal to a preset battery level, the charging start switch is disconnected. This ensures that the battery module in the system can be charged normally even when the battery is at 0V or extremely low voltage, allowing the BMS to start and control the charging start switch based on the real-time battery level to prevent overcharging. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a circuit diagram of a battery system provided in an embodiment of this application;

[0039] Reference numerals: 100-Battery module; 200-Activation and charging interface; 300-DC-DC converter; 400-Communication interface; BMS-Battery Management System; K1-Charging start switch; D1-One-way conduction device; FU1-First fuse; FU2-Second fuse; K2-Main positive relay; P+-Positive output interface; P--Negative output interface. Detailed Implementation

[0040] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0042] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0044] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0045] like Figure 1 As shown in the illustration, this application provides a battery system including: a battery module 100, a battery management system (BMS), an activation and charging interface 200, a charging start switch K1, and a DC-DC converter 300; the input terminal of the activation and charging interface 200 is used to connect to an external power source; the positive output terminal of the activation and charging interface 200 is connected to the positive terminal of the battery module 100 and the positive input terminal of the DC-DC converter 300; the negative output terminal of the activation and charging interface 200 is connected to the input terminal of the charging start switch K1; the output terminal of the charging start switch K1 is connected to the negative terminal of the battery module 100 and the negative input terminal of the DC-DC converter 300; the output of the DC-DC converter 300... The battery module 100 is connected to the power input terminal of the battery management system (BMS); the first control terminal of the BMS is connected to the control terminal of the charging start switch K1; the charging start switch K1, when closed, outputs the first voltage input from the activation charging interface 200 to the battery module 100 and the DC-DC converter 300; the DC-DC converter 300 receives the first voltage, converts it into a second voltage, and outputs it to the BMS; the BMS starts after receiving the second voltage and collects the real-time power of the battery module 100. When the collected real-time power is greater than or equal to the preset power, it controls the charging start switch K1 to open.

[0046] In this embodiment, when the battery is at 0V or extremely low voltage, the operator can manually press the charging start switch K1 to close it. This connects the negative output terminal of the activation charging interface 200 with the negative terminal of the battery module 100 and the negative input terminal of the DC-DC converter 300. External power then outputs a first voltage through the activation charging interface 200 to the battery module 100 and the DC-DC converter 300 to charge the battery module 100. The DC-DC converter 300 receives the first voltage, converts it into a second voltage (e.g., 24V), and outputs it to the battery management system (BMS) to power the BMS. Upon receiving the second voltage, the BMS starts up and collects the real-time power level of the battery module 100. When the collected real-time power level is greater than or equal to a preset power level, the BMS controls the charging start switch K1 to open, preventing overcharging of the battery module 100.

[0047] Compared with the prior art, this application provides a battery system including: a battery module 100, a battery management system (BMS), an activation and charging interface 200, a charging start switch K1, and a DC-DC converter 300; the input terminal of the activation and charging interface 200 is used to connect to an external power source; the positive output terminal of the activation and charging interface 200 is connected to the positive terminal of the battery module 100 and the positive input terminal of the DC-DC converter 300; the negative output terminal of the activation and charging interface 200 is connected to the input terminal of the charging start switch K1; the output terminal of the charging start switch K1... The battery module 100 is connected to its negative terminal and the DC-DC converter 300 to its negative input terminal; the output terminal of the DC-DC converter 300 is connected to the power input terminal of the battery management system (BMS); the first control terminal of the BMS is connected to the control terminal of the charging start switch K1; the charging start switch K1, when closed, outputs a first voltage input from the activation charging interface 200 to the battery module 100 and the DC-DC converter 300; the DC-DC converter 300 receives the first voltage and converts it into a second voltage. The second voltage is output to the battery management system (BMS). Upon receiving the second voltage, the BMS starts and collects the real-time charge level of the battery module 100. When the collected real-time charge level is greater than or equal to a preset charge level, it controls the charging start switch K1 to open. In this application, when the battery is at 0V or extremely low voltage, the charging start switch K1 is closed, allowing the activation charging interface 200 connected to an external power source to charge the battery module 100. Additionally, the DC-DC converter 300 converts the first voltage input from the activation charging interface 200 into a second voltage to power the BMS, enabling the BMS to start. When the collected real-time charge level of the battery module 100 is greater than or equal to a preset charge level, the charging start switch K1 is opened. This ensures that the battery module 100 can be charged normally even when the battery is at 0V or extremely low voltage, allowing the BMS to start and control the charging start switch K1 based on the real-time charge level of the battery module 100, thus preventing overcharging of the battery module 100.

[0048] like Figure 1 As shown, in one embodiment, this application further includes: a unidirectional conduction device D1; the positive output terminal of the activation charging interface 200 is connected to the positive terminal of the battery module 100 and the positive terminal of the unidirectional conduction device D1; the negative terminal of the unidirectional conduction device D1 is connected to the positive input terminal of the DC-DC converter 300.

[0049] In this embodiment, the unidirectional conducting device D1 can be any one of diode, switching transistor, relay, or contactor. The unidirectional conducting device D1 conducts in one direction and is cut off in the reverse direction. By setting the unidirectional conducting device D1, the reverse voltage output by the DC-DC converter 300 is prevented from being applied to the external power supply through the activation power supply interface 200, thus avoiding the influence of reverse voltage on the external power supply, reducing the reverse voltage stress on the external power supply, and reducing the stress requirements of the external power supply.

[0050] like Figure 1 As shown, in one embodiment of this application, the unidirectional conducting device D1 is a diode.

[0051] In this embodiment, diodes are preferred because they have good unidirectional conduction performance and high cost-effectiveness.

[0052] like Figure 1 As shown, in one embodiment, this application further includes: a first fuse FU1; the positive output terminal of the activation charging interface 200 is connected to the first terminal of the first fuse FU1; and the second terminal of the first fuse FU1 is connected to the positive terminal of the battery module 100 and the positive terminal of the unidirectional conduction device D1.

[0053] In this embodiment, when the current value of the power input from the activation charging interface 200 is greater than or equal to the current value corresponding to the self-blowout of the first fuse FU1 due to the influence of thunderstorms, static electricity, or electromagnetic interference from the surrounding environment, the first fuse FU1 blows and cuts off the current, thereby disconnecting the path between the activation charging interface 200 and the battery module 100 and the DC-DC converter 300, which can effectively reduce the risk of damage to the battery module 100 and the DC-DC converter 300.

[0054] like Figure 1 As shown, in one embodiment, this application further includes: a main positive relay K2, a positive output interface P+, ​​and a negative output interface P-; the first contact of the main positive relay K2 is connected to the positive terminal of the battery module 100, the second terminal of the first fuse FU1, and the positive terminal of the unidirectional conducting device D1; the second contact of the main positive relay K2 is connected to the positive output interface P+; the coil of the main positive relay K2 is connected to the second control terminal of the battery management system BMS; the negative terminal of the battery module 100 is connected to the output terminal of the charging start switch K1, the negative input terminal of the DC-DC converter 300, and the negative output interface P-.

[0055] In this embodiment, when the battery management system (BMS) receives a discharge command, the BMS controls the coil of the main positive relay K2 to be energized, causing the main positive relay K2 to close, and the battery module 100 discharges and outputs through the positive output interface P+ and the negative output interface P-.

[0056] like Figure 1 As shown, in one embodiment, this application further includes: a second fuse FU2; the first end of the second fuse FU2 is connected to the positive terminal of the battery module 100; the second end of the second fuse FU2 is connected to the positive terminal of the unidirectional conducting device D1, the second end of the first fuse FU1, and the first contact of the main positive relay K2.

[0057] In this embodiment, when the current value of the power output from the positive terminal of the battery module 100 is greater than or equal to the current value corresponding to the self-blowout of the second fuse FU2 due to the influence of thunderstorms, static electricity, or electromagnetic interference from the surrounding environment, the second fuse FU2 melts and cuts off the current, thereby disconnecting the path between the battery module 100 and the positive output interface P+, ​​which can effectively reduce the risk of damage to the devices connected to the positive output interface P+.

[0058] In one embodiment of this application, the battery module 100 includes a plurality of sodium-ion batteries; the plurality of sodium-ion batteries are connected in series or in parallel.

[0059] In this embodiment, the sodium-ion battery can be over-discharged to 0V or an extremely low voltage (such as 0.5V) at room temperature or 0.5C.

[0060] like Figure 1 As shown, in one embodiment, this application also includes: a communication interface; the communication terminal of the battery management system (BMS) is connected to the communication interface.

[0061] In this embodiment, the battery management system (BMS) can receive instructions sent by external controllers (such as a host computer) through a communication interface. Various data signals collected by the battery management system (such as the total voltage, current, temperature, state of charge, and alarm signals of the battery system) can also be output to external controllers through the communication interface, and the data can be displayed by the external controllers.

[0062] The embodiments in this specification are described in a progressive manner, with each embodiment focusing on the related aspects.

[0063] For any differences between the embodiments, or for the same or similar parts between the embodiments, please refer to each other.

[0064] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery system, characterized in that, include: Battery module, battery management system, activation and charging interface, charging start switch and DC-DC converter; The input terminal of the activation power interface is used to connect to an external power source; The positive output terminal of the activation charging interface is connected to the positive terminal of the battery module and the positive input terminal of the DC-DC converter; The negative output terminal of the activation power-up interface is connected to the input terminal of the power-up start switch; The output terminal of the power-on switch is connected to the negative terminal of the battery module and the negative input terminal of the DC-DC converter. The output terminal of the DC-DC converter is connected to the power input terminal of the battery management system; The first control terminal of the battery management system is connected to the control terminal of the charging start switch; The power-up start switch is used to output the first voltage input from the power-up activation interface to the battery module and the DC-DC converter when closed; The DC-DC converter is used to receive the first voltage, convert the first voltage into a second voltage, and output it to the battery management system. The battery management system starts upon receiving the second voltage and collects the real-time power level of the battery module. When the collected real-time power level is greater than or equal to the preset power level, it controls the charging start switch to disconnect.

2. The battery system according to claim 1, characterized in that, Also includes: One-way conduction device; The positive output terminal of the activation charging interface is connected to the positive terminal of the battery module and the positive terminal of the unidirectional conduction device; The negative terminal of the unidirectional conducting device is connected to the positive input terminal of the DC-DC converter.

3. The battery system according to claim 2, characterized in that, The unidirectional conducting device is a diode.

4. The battery system according to claim 2, characterized in that, Also includes: First fuse; The positive output terminal of the activation power interface is connected to the first terminal of the first fuse; The second end of the first fuse is connected to the positive terminal of the battery module and the positive terminal of the unidirectional conduction device.

5. The battery system according to claim 4, characterized in that, Also includes: Main positive relay, positive output interface and negative output interface; The first contact of the main positive relay is connected to the positive terminal of the battery module, the second terminal of the first fuse, and the positive terminal of the unidirectional conducting device; The second contact of the main positive relay is connected to the positive output interface; The coil of the main positive relay is connected to the second control terminal of the battery management system; The negative terminal of the battery module is connected to the output terminal of the power-on switch, the negative input terminal of the DC-DC converter, and the negative output interface.

6. The battery system according to claim 5, characterized in that, Also includes: Second fuse; The first end of the second fuse is connected to the positive terminal of the battery module; The second end of the second fuse is connected to the positive terminal of the unidirectional conducting device, the second end of the first fuse, and the first contact of the main positive relay.

7. The battery system according to claim 1, characterized in that, The battery module includes multiple sodium-ion batteries; Multiple sodium-ion batteries may be connected in series or in parallel.

8. The battery system according to any one of claims 1 to 7, characterized in that, Also includes: Communication interface; The communication terminal of the battery management system is connected to the communication interface.

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