CN206564304U - The security protection system and battery system of battery system - Google Patents

Abstract

The utility model relates to a battery system safety protection system and the battery system. The safety protection system includes a gas monitoring device, a power supply, a control switch and a relay, wherein: the gas monitoring device is connected with the control switch for When it is detected that the concentration of the characteristic gas emitted by the battery pack in the battery system is greater than the first preset threshold, the control switch is controlled to be turned off; otherwise, the control switch is controlled to be closed; the control terminal of the relay, the power supply And the control switch is connected to form a control loop; the controlled end of the relay is suitable for being connected with the battery pack in the battery system and the high voltage box in the battery system to form a controlled loop. The utility model can control the failure risk of the battery in real time, and can be switched on and off independently when there is a failure risk, thereby realizing the passive safety protection of the battery pack and ensuring the safe operation of the battery pack.

Description

Battery system safety protection system and battery system

technical field

The utility model relates to the technical field of battery protection, in particular to a battery system safety protection system and the battery system.

Background technique

When the battery system is overcharged or working with high current for a long time, the temperature of the battery pack will rise. In severe cases, thermal runaway may occur, which will endanger the safety of the battery pack. Since many batteries are arranged in close proximity, the heat is easily diffused, causing thermal runaway of other batteries, and such a chain reaction will greatly increase the failure risk of the battery system.

The current use safety of the current battery system is usually monitored through the battery management system (BMS), which is an active safety protection measure. However, as an integrated circuit, the BMS management system has a certain risk of failure. Therefore, how to improve the safety during use of the battery pack, especially the passive safety is particularly important.

Utility model content

(1) Solved technical problems

The utility model provides a battery system safety protection system and the battery system, which solves the technical problem of low safety in the use process of the battery pack in the prior art.

(2) Technical solution

In the first aspect, the safety protection system of the battery system provided by the utility model includes a gas monitoring device, a power supply, a control switch and a relay, wherein:

The gas monitoring device is connected to the control switch, and is used to control the control switch to turn off when it detects that the concentration of the characteristic gas emitted by the battery pack in the battery system is greater than a first preset threshold, otherwise control The control switch is closed; the control terminal of the relay, the power supply and the control switch are connected to form a control loop; the controlled terminal of the relay is suitable for connecting with the battery pack in the battery system and the high voltage box in the battery system form a controlled loop.

Optionally, the gas monitoring device is also connected to the power supply.

Optionally, the gas monitoring device is further configured to: be connected to a vehicle-mounted battery management system, and send a message to the The battery management system sends out an early warning signal;

Wherein, the battery management system is connected to the vehicle controller, and is configured to feed back the warning signal to the user through the vehicle controller when receiving the warning signal.

Optionally, the battery management system is further configured to: connect to the high voltage box;

The vehicle controller is also configured to: when receiving the early warning signal, send an instruction to the high voltage box to cut off the internal circuit of the high voltage box through the battery management system, so that the controlled circuit disconnect.

Optionally, the safety protection system further includes a fire extinguishing device, the fire extinguishing device is connected to the gas monitoring device, and the gas monitoring device is used to detect the characteristic gas emitted by the battery pack in the battery system When the concentration is greater than a second preset threshold indicating that the battery pack is on fire, the fire extinguishing device is activated.

Optionally, the safety protection system further includes a manual switch arranged in the control loop.

Optionally, the characteristic gas includes volatile organic compounds.

Optionally, the control switch is a normally closed switch.

In the second aspect, the battery system provided by the utility model includes a battery pack and a high-voltage box, and also includes the above-mentioned safety protection system.

(3) Beneficial effects

The safety protection system and the battery system of the battery system provided by the utility model, when the battery pack does not emit characteristic gas or the concentration of the characteristic gas is less than or equal to the first preset threshold, the control switch is in the closed state, so that the power supply, control switch and relay The control loop formed by the control end of the relay is turned on, and the controlled end of the relay is in the working state, so that the controlled loop is turned on, so that the battery pack can supply power for the external connection. When the concentration of the characteristic gas emitted by the battery pack in the battery system is greater than the first preset threshold, the control switch is in the open state, so that the control loop formed by the power supply, the control switch and the control terminal of the relay is disconnected, and the controlled terminal of the relay is at In the non-working state, the controlled circuit is disconnected, so that the battery pack cannot supply power to the outside world. Here, the gas monitoring device is used to detect the concentration of the characteristic gas, and the on-off of the above-mentioned control switch is controlled according to the concentration, so that the control loop is turned on or off, and finally the on-off or off of the controlled loop is controlled to realize Control whether the battery pack can supply power to the external load. Since the safety protection system provided by the utility model can control the failure risk of the battery in real time, it can be switched on and off independently when there is a risk of failure, realizing the passive safety protection of the battery pack and ensuring the safe operation of the battery pack.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present disclosure. For those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative efforts.

Fig. 1 shows a schematic structural diagram of a battery system in an embodiment of the present invention;

Explanation of reference signs:

1-battery pack; 2-gas monitoring device; 3-relay; 31-control terminal of relay; 32-controlled terminal of relay; 4-power supply; 5-control switch; 6-manual switch; 7-high voltage box; 8 -Battery management system; 9-Vehicle controller.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present disclosure with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present disclosure.

In the first aspect, the utility model provides a battery system safety protection system, as shown in Figure 1, the system includes: a gas monitoring device 2, a power supply 4, a control switch 5 and a relay 3, wherein:

The gas monitoring device 2 is connected to the control switch 5, and is used to control the control switch 5 to turn off when it detects that the concentration of the characteristic gas emitted by the battery pack 1 in the battery system is greater than the first preset threshold value. open, otherwise control the control switch 5 to close; the control terminal 31 of the relay 3, the power supply and the control switch 5 are connected to form a control loop; the power supply 4 is suitable for connecting with the battery pack 1 and the battery pack in the battery system In the battery system, the high voltage box 7 is connected to form a controlled loop. .

It can be understood that when the battery system does not emit the characteristic gas or the concentration of the characteristic gas is less than or equal to the first preset threshold, it indicates that the battery system is in a normal working state; once the concentration of the characteristic gas emitted by the battery pack 1 in the battery system is high When the first preset threshold is reached, it indicates that there is a failed battery in the battery system, and the battery system enters into an abnormal working state, that is, a failure state.

It can be understood that the so-called characteristic gas can be carbon monoxide, etc., or volatile organic compounds. For different types of batteries, the types of characteristic gases are different, which is not limited in the present invention.

It can be understood that the so-called high voltage box refers to the bridge between the battery pack and the load in the existing battery system, and the battery pack supplies power to the load through the high voltage box.

In the safety protection system provided by the utility model, when the battery system does not emit the characteristic gas or the concentration of the characteristic gas is less than or equal to the first preset threshold, the control switch 5 is in the closed state, so that the control of the power supply, the control switch 5 and the relay 3 The control loop formed by terminal 31 is turned on, and the power supply 4 is in the working state, so that the controlled loop is turned on, so that the battery pack 1 can supply power for external connections. When the concentration of the characteristic gas emitted by the battery pack 1 in the battery system is greater than the first preset threshold, the control switch 5 is in an open state, so that the control loop formed by the power supply, the control switch 5 and the control terminal 31 of the relay 3 is disconnected, and the power supply 4 is in a non-working state, thereby causing the controlled circuit to be disconnected, so that the battery pack 1 cannot supply power to the outside world. Here, the gas monitoring device 2 is used to detect the concentration of the characteristic gas, and the on-off of the above-mentioned control switch 5 is controlled according to the concentration, so that the control loop is turned on or off, and finally the controlled loop is controlled on or off. to control whether the battery pack 1 can supply power to external loads. Since the safety protection system provided by the utility model can control the risk of battery failure in real time, it can be switched on and off independently when there is a risk of failure, which realizes the passive safety protection of the battery pack 1, ensures the safe operation of the battery pack 1, and improves the battery life. Safety of battery operation.

It is understandable that the above control method may be called a relay control method.

In specific implementation, a closed battery system can be selected, and the gas monitoring device 2 can be arranged inside the battery system to more conveniently collect the characteristic gas emitted by the battery pack 1 in the battery system and improve the concentration detection. Accuracy.

In practice, the control switch 5 can be a normally closed switch, so that the control operation is only performed when the concentration of the characteristic gas is greater than the first preset threshold, and of course other types of switches can also be used.

During specific implementation, as shown in Figure 1, the gas monitoring device 2 can be connected with the above-mentioned power supply, and the gas monitoring device 2 can be powered by the above-mentioned power supply. Of course, the gas monitoring device 2 can be powered by a separate power supply, and this utility model does not Do limited.

In specific implementation, as shown in FIG. 1, the above-mentioned gas monitoring device 2 can also be connected to the vehicle-mounted battery management system 8, and when it is detected that the concentration of the characteristic gas emitted by the battery pack 1 in the battery system is greater than the first When the threshold is preset, an early warning signal is sent to the battery management system 8; wherein, the battery management system 8 is connected to the vehicle controller 9, and is used to pass the vehicle The controller 9 feeds back the warning signal to the user.

For example, when the gas monitoring device 2 detects that the concentration of the characteristic gas is higher than the first preset threshold, an early warning signal is sent to the battery management system 8, and the battery management system 8 sends the early warning signal to the vehicle controller 9, and the vehicle The controller 9 feeds back to the user, such as displaying on the central control panel of the vehicle, so that the user can obtain the current usage status of the battery.

Of course, as shown in Figure 1, the battery management system 8 can also be connected to the high voltage box 7; at this time, the vehicle controller 9 is also used to: 8 Sending an instruction for cutting off the internal circuit of the high-voltage box 7 to the high-voltage box 7, so that the controlled circuit is disconnected.

That is to say, when the vehicle controller 9 receives the early warning signal, it generates an instruction according to the early warning signal and sends the instruction to the battery management system 8; the battery management system 8 sends the instruction to the high voltage box 7 to control the high voltage box The internal circuit of 7 is disconnected, thereby disconnecting the controlled circuit, so that the battery pack 1 cannot supply power to the load. This method may be called a high-voltage box control method.

Here, on the basis of setting the control loop, the vehicle controller 9 is used to control the internal circuit of the high-voltage box 7 again to control whether the battery pack 1 can supply power to the load, which plays a role of double protection and further ensures the characteristic When the gas concentration is higher than the first preset threshold, the battery pack 1 cannot supply power to the load.

In specific implementation, a manual switch 6 can also be set in the control loop, so that only when the manual switch 6 is in the closed state, the control loop will be conducted after the gas monitoring device 2 closes the control switch 5 . Therefore, it is possible to select whether to adopt the relay control mode by manually operating the manual switch 6 .

For example, when the user chooses to close the manual switch 6, the gas monitoring device 2 can control the closing of the control switch 5 according to the concentration of the characteristic gas, thereby making the control circuit conduction or disconnection, and then controlling the conduction or disconnection of the controlled circuit. On, and then control the battery pack 1 to supply power to the load. When the user chooses to turn off the manual switch 6, even if the gas monitoring device 2 closes the control switch 5 according to the concentration of the characteristic gas, the control loop is still in the off state, and the controlled loop is in the off state. It can be seen that when the manual switch 6 is closed, the relay control mode and the high-voltage box control mode are selected at the same time, and when the manual switch 6 is turned off, only the high-voltage box control mode can be used.

During specific implementation, the safety protection system provided by the utility model may also include a fire extinguishing device, which is connected to the gas monitoring device 2, and the gas monitoring device 2 is used to detect the battery pack 1 in the battery system When the concentration of the emitted characteristic gas is greater than a second preset threshold indicating that the battery pack 1 is on fire, the fire extinguishing device is activated. Here, when the battery catches fire, the fire extinguishing device is activated, and the battery pack 1 is extinguished by the fire extinguishing device. It can be understood that the above-mentioned first preset threshold is smaller than the above-mentioned second preset threshold.

In the second aspect, the utility model provides a battery system, which includes a battery pack 1 and a high-voltage box 7, and also includes any one of the above-mentioned safety protection systems.

It can be understood that the battery system provided by the present invention includes the above-mentioned safety protection system, so the explanations, examples, optional implementation methods, beneficial effects, etc. of the relevant content can refer to the corresponding parts of the above-mentioned safety protection system, and will not be repeated here repeat.

It should be noted that although in the safety protection device and battery system provided by the utility model, some modules involve computer programs, the improvement of the utility model is not here, but the corresponding functions can be realized by using the prior art The hardware module is realized, for example, the gas monitoring device can be realized by using the module in the prior art that can collect gas and has simple analysis ability, so the utility model does not involve the improvement of the method.

In summary:

The safety protection system and the battery system of the battery system provided by the embodiment of the utility model, when the battery system does not emit characteristic gas or the concentration of the characteristic gas is less than or equal to the first preset threshold, the control switch is in the closed state, so that the power supply, control switch The control loop formed with the control terminal of the relay is turned on, and the power supply is in the working state, so that the controlled loop is turned on, so that the battery pack can supply power for the external connection. When the concentration of the characteristic gas emitted by the battery pack in the battery system is greater than the first preset threshold, the control switch is in the open state, so that the control loop formed by the power supply, the control switch and the control terminal of the relay is disconnected, and the power supply is in a non-working state. In turn, the controlled circuit is disconnected, so that the battery pack cannot supply power to the outside world. Here, the gas monitoring device is used to detect the concentration of the characteristic gas, and the on-off of the above-mentioned control switch is controlled according to the concentration, so that the control loop is turned on or off, and finally the on-off or off of the controlled loop is controlled to realize Control whether the battery pack can supply power to the external load. Since the safety protection system provided by the utility model can control the risk of battery failure in real time, it can be switched on and off independently when there is a risk of failure, which realizes passive safety protection for the battery pack, ensures the safe operation of the battery pack, and improves battery operation. security.

In the description of the utility model, a large number of specific details have been explained. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure the understanding of this description.

The above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand; The technical solutions described in the examples are modified, or some of the technical features are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (9)

1. a kind of security protection system of battery system, it is characterised in that including gas monitoring apparatus, power supply, controlling switch and Relay, wherein：

The gas monitoring apparatus, is connected with the controlling switch, for the battery pack hair in the battery system is detected When the concentration of the characteristic gas gone out is more than the first predetermined threshold value, control the controlling switch to disconnect, otherwise control the control to open Close and close；The control end of the relay, the power supply and the controlling switch connect to form control loop；The relay Controlled end, suitable for being connected to form controlled loop with the battery pack in battery system and battery system mesohigh case.

2. security protection system according to claim 1, it is characterised in that the gas monitoring apparatus also with the power supply Connection.

3. security protection system according to claim 1, it is characterised in that the gas monitoring apparatus is additionally operable to：Connection To vehicle-mounted battery management system, and the concentration of characteristic gas that battery pack in the battery system is detected is sent is more than During the first predetermined threshold value, pre-warning signal is sent to the battery management system；

Wherein, the battery management system, is connected to entire car controller, and for when receiving the pre-warning signal, passing through The pre-warning signal is fed back to user by the entire car controller.

4. security protection system according to claim 3, it is characterised in that the battery management system is additionally operable to：Connection To the high-voltaghe compartment；

The entire car controller is additionally operable to：When receiving the pre-warning signal by the battery management system to the high pressure Case sends the instruction of the internal circuit for cutting off the high-voltaghe compartment, so that the controlled loop disconnects.

5. security protection system according to claim 1, it is characterised in that also including extinguishing device, the extinguishing device It is connected with the gas monitoring apparatus, and the battery pack hair that the gas monitoring apparatus is used in the battery system is detected When the concentration of the characteristic gas gone out is more than the sign battery pack the second predetermined threshold value on fire, start the extinguishing device.

6. according to any described security protection system of Claims 1 to 5, it is characterised in that also including being arranged on the control Hand switch in loop.

7. according to any described security protection system of Claims 1 to 5, it is characterised in that the characteristic gas includes volatilization Property organic compound.

8. according to any described security protection system of Claims 1 to 5, it is characterised in that the controlling switch is opened to be normally closed Close.

9. a kind of battery system, including battery pack and high-voltaghe compartment, it is characterised in that also any described including claim 1~8 Security protection system.