Novel over-temperature protection system of storage battery

Abstract

The utility model relates to a novel over-temperature protection system of a storage battery, and belongs to the technical field of over-temperature protection of storage batteries. Comprising a controller, a temperature sensor, a storage battery, an execution unit and a charging unit. The storage battery is connected with the controller and the temperature sensor; the controller is connected with the execution unit and the temperature sensor; the storage battery is connected with the charging unit through an execution unit; the temperature sensor detects the temperature of the storage battery in the charging process and transmits the temperature to the controller, the controller controls the execution unit to cut off the power transmission circuit when detecting that the charging temperature of the storage battery is too high, the charging unit stops charging, and burning loss caused by continuous temperature rise of the storage battery or release of a large amount of hydrogen and serious thermal runaway are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of over-temperature protection of storage batteries, and in particular relates to a novel over-temperature protection system for storage batteries. Background Art

[0002] Railway vehicle batteries are used for starting ignition power supply for diesel multiple units, pantograph raising and lighting for electric multiple units, etc., and as emergency backup power supply when the vehicle loses external power supply. They are important facilities in railway vehicles. Types of railway batteries include lead-acid, nickel-cadmium and even lithium battery technologies. Among them, nickel-cadmium technology is the current mainstream railway battery, and its safety and maintainability are better than other battery types. However, no matter what kind of battery, the temperature of the battery affects the safety of railway applications. However, because the chargers matched with batteries of different brands are not uniform, some chargers can only perform temperature compensation according to temperature signals, but cannot cut off charging when the set over-temperature value is reached. They can only maintain a minimum charging voltage, which brings certain safety hazards. Continuing to charge under over-temperature conditions may cause the battery temperature to continue to rise and burn, or release a large amount of hydrogen, resulting in serious thermal runaway. Utility Model Content

[0003] The purpose of the utility model is to provide a new over-temperature protection system for a battery, which is used to solve the problem that some chargers in the prior art can only perform temperature compensation function according to temperature signals, but cannot cut off charging when the set over-temperature value is reached, and can only maintain a minimum charging voltage, which brings certain safety hazards. Continuing to charge under over-temperature conditions may cause the battery temperature to continue to rise and burn, or release a large amount of hydrogen, resulting in serious thermal runaway problems.

[0004] The purpose of the utility model can be achieved through the following technical solutions:

[0005] A novel over-temperature protection system for a battery comprises a controller, a temperature sensor, a battery, an execution unit and a charging unit; the battery is connected to the controller and the temperature sensor; the controller is connected to the execution unit and the temperature sensor; the battery is connected to the charging unit via the execution unit.

[0006] As a further solution of the utility model: it also includes a battery body, the battery is arranged in the battery body, and the temperature sensor is installed on the battery body to detect the battery temperature.

[0007] As a further solution of the utility model: it also includes a connector, and the temperature sensor is connected to the battery body through the connector.

[0008] As a further solution of the utility model: the execution unit includes any one of a contactor or a circuit breaker.

[0009] As a further solution of the present invention: the temperature sensor is an NTC temperature sensor.

[0010] As a further solution of the utility model: the number of the temperature sensors is several, and the several temperature sensors are installed at different positions of the battery body.

[0011] Beneficial effects of the utility model:

[0012] The utility model discloses a novel over-temperature protection system for a battery, which detects the temperature of the battery during charging by a temperature sensor and transmits it to a controller. When the controller detects that the battery charging temperature is too high, it controls the execution unit to cut off the power transmission circuit, so that the charging unit stops charging. By connecting the battery to an independent over-temperature protection system, the battery can be independently managed for over-temperature to prevent the battery temperature from continuing to rise and burning, or releasing a large amount of hydrogen, resulting in serious thermal runaway. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings.

[0014] Figure 1 This is a block diagram of a new over-temperature protection system for a battery proposed by the utility model;

[0015] Figure 2 The utility model discloses a novel over-temperature protection system for a battery.

[0016] In the figure: 1. Battery body; 2. Connector. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] like Figure 1-2 As shown, a new over-temperature protection system for a battery includes a battery body 1 and a connector 2 installed on the battery body 1. The connector 2 is detachably installed on the battery body 1. A temperature sensor is installed on the connector 2. The temperature sensor is used to detect whether the battery installed in the battery body 1 is overheated during charging. If the temperature sensor detects that the local temperature of the battery exceeds 70 degrees Celsius, the charging operation is cut off.

[0019] In one embodiment, the over-temperature protection system includes a battery, a temperature sensor, a controller, a charging unit and an execution unit. The battery is connected to the charging unit through the execution unit. The temperature of the battery charging process is detected by the temperature sensor and transmitted to the controller. When the controller detects that the battery charging temperature is too high, it controls the execution unit to cut off the power transmission circuit.

[0020] The battery is connected to the controller and the temperature sensor to provide power to the temperature sensor and the controller during operation;

[0021] The controller is connected with the execution unit and the temperature sensor;

[0022] The execution unit can cut off the power supply of the circuit through a contactor, or cut off the power supply of the circuit through remote control of a circuit breaker;

[0023] In one embodiment, the battery is redundantly provided with two temperature sensors, which are used to detect whether the temperature of different parts of the battery is overheated on the one hand, and to avoid that when one of the temperature sensors fails, the other temperature sensor can still normally collect the temperature of the battery during charging.

[0024] In one embodiment, the temperature sensor is an NTC temperature sensor.

[0025] In one embodiment, the controller is an MCU controller.

[0026] The temperature sensor is connected to the battery body 1 through the connector 2, which can be easily replaced and repaired. When the temperature sensor fails or needs to be replaced, the new temperature sensor can be removed or installed by simply disconnecting the connector 2 without large-scale disassembly of the entire system.

[0027] Connector 2 makes the location of the temperature sensor relatively flexible, and the most suitable installation location can be selected according to the specific design and layout of the battery to ensure that the temperature change of the battery can be accurately detected.

[0028] Connector 2 provides a stable and reliable electrical connection, which can ensure that the temperature sensor switch contact signal can be accurately transmitted to the controller, thus avoiding signal loss or interference and ensuring the normal operation of the over-temperature protection system.

[0029] The control power comes from the battery itself. The temperature sensor is installed on the connecting copper bus of the battery. When the battery temperature reaches the set point, the contact of the temperature switch of the temperature sensor will be activated. The action signal of the contact is output to the controller through connector 2. The controller controls the execution unit (such as a contactor or a remotely operable circuit breaker) to cut off the charging circuit of the battery. This can prevent safety problems caused by overheating of the battery and protect the performance and life of the battery.

[0030] The working principle of a new over-temperature protection system for a battery involved in the utility model is as follows: a temperature sensor is used to detect the temperature of the battery during charging and transmit it to a controller. When the controller detects that the battery charging temperature is too high, it controls the execution unit to cut off the power transmission circuit, so that the charging unit stops charging, to prevent the battery temperature from continuing to rise and burning, or releasing a large amount of hydrogen, resulting in serious thermal runaway.

[0031] The above describes some embodiments of the utility model in detail, but the above contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A new over-temperature protection system for a battery, characterized in that: It includes a controller, a temperature sensor, a battery, an execution unit and a charging unit; the battery is connected to the controller and the temperature sensor; the controller is connected to the execution unit and the temperature sensor; the battery is connected to the charging unit through the execution unit.

2. A novel over-temperature protection system for a battery according to claim 1, characterized in that: It also includes a battery body, the battery is arranged in the battery body, and the temperature sensor is installed on the battery body to detect the battery temperature.

3. A novel over-temperature protection system for a storage battery according to claim 2, characterized in that: A connector is also included, and the temperature sensor is connected to the battery body through the connector.

4. A novel over-temperature protection system for a battery according to claim 1, characterized in that: The execution unit includes any one of a contactor and a circuit breaker.

5. A novel over-temperature protection system for a storage battery according to claim 1, characterized in that: The temperature sensor is an NTC temperature sensor.

6. A novel over-temperature protection system for a battery according to claim 3, characterized in that: The number of the temperature sensors is several, and the several temperature sensors are installed at different positions of the battery body.

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