Battery fire extinguishing protection system

Abstract

The utility model discloses a battery fire extinguishing protection system, a battery comprises a plurality of battery modules connected in series, and the system comprises a plurality of fire extinguishing devices and a control device; the fire extinguishing devices are respectively mounted on the battery modules; the control device is connected with all the fire extinguishing devices and used for triggering the battery module and the fire extinguishing devices on the battery modules adjacent to the battery module to extinguish fire when the certain battery module reaches the fire extinguishing triggering condition. According to the battery fire extinguishing protection system provided by the invention, by arranging the control device, when a certain battery module reaches the fire extinguishing triggering condition, the battery module and the fire extinguishing device on the battery module adjacent to the battery module are triggered to extinguish fire, so that the fire can be prevented from quickly spreading to the adjacent module; the reliability of battery safety protection is greatly improved, and the fire extinguishing effect of the battery is remarkably improved.

Description

Technical Field

[0001] The present application relates to the field of battery safety technology, and in particular to a battery fire extinguishing protection system. Background Art

[0002] At present, battery safety has always been a key concern for relevant manufacturers and consumers. Most of the existing safety measures are passive protection, that is, when the battery has thermal runaway, each module on the battery will extinguish the fire by activating its own explosion-proof device and fire extinguishing device.

[0003] However, this passive protection safety measure has low reliability. In particular, when a battery module catches fire, the fire will quickly spread to adjacent modules, and the modules cannot quickly extinguish the fire. Therefore, the fire extinguishing effect is poor and cannot meet the battery safety needs. Utility Model Content

[0004] In order to solve the above technical problems, the purpose of the utility model is to provide a battery fire extinguishing protection system which can improve the fire extinguishing effect.

[0005] The technical solution provided by the utility model is as follows:

[0006] A battery fire extinguishing protection system, the battery comprising a plurality of battery modules connected in series, the system comprising a plurality of fire extinguishing devices and a control device; each of the fire extinguishing devices is respectively installed on each battery module; the control device is connected to each fire extinguishing device, and is used to trigger the fire extinguishing devices on a battery module and battery modules adjacent to the battery module to extinguish a fire when a battery module reaches a fire extinguishing trigger condition.

[0007] Preferably, it also includes a fire extinguishing pipeline, which is connected to each fire extinguishing device and is used to store the fire extinguishing agent and transport the fire extinguishing agent to each fire extinguishing device.

[0008] Preferably, each battery module is provided with a pressure relief hole, and each fire extinguishing device is provided with a nozzle facing the pressure relief hole, for spraying the fire extinguishing material generated by the fire extinguishing agent through the nozzle and the pressure relief hole into the battery module.

[0009] Preferably, the fire extinguishing agent includes solid particles composed of metal oxides and carbonates. After the fire extinguishing device is activated, the solid particles can absorb a portion of the heat released by the fire source.

[0010] Preferably, it also includes a plurality of thermosensitive wires, each of which is installed on a corresponding fire extinguishing device. The fire extinguishing device stores an aerosol generator. When extinguishing a fire, the aerosol generator is ignited and activated by the thermosensitive wire, and then generates an aerosol through a redox reaction to adsorb and consume the active groups in the combustion.

[0011] Preferably, each of the thermosensitive wires is arranged along the length direction of the battery module and covers the entire length direction.

[0012] Preferably, the fire extinguishing triggering conditions of the battery module include one or more of voltage abnormality, temperature abnormality, and temperature rise abnormality.

[0013] A battery fire extinguishing protection system, the battery comprising a plurality of battery modules connected in series, each battery module being provided with a pressure relief hole, the system comprising a plurality of fire extinguishing devices, a fire extinguishing pipeline, a control device, and a plurality of thermal wires; the fire extinguishing pipeline is connected to the fire extinguishing devices, and is used to store a fire extinguishing agent and transport the fire extinguishing agent to the fire extinguishing devices; each of the fire extinguishing devices is respectively installed on each battery module, each of the fire extinguishing devices is provided with a nozzle facing the pressure relief hole, and is used to spray the fire extinguishing material generated by the fire extinguishing agent into the battery module through the nozzle through the pressure relief hole, and each of the fire extinguishing devices stores an aerosol generating agent; each of the thermal wires is correspondingly installed on each fire extinguishing device, so that when the battery module catches fire, the thermal wire can be ignited and activate the aerosol generating agent to generate aerosol for fire extinguishing; the control device is connected to the fire extinguishing devices, and is used to trigger the fire extinguishing devices on the battery module and the battery modules adjacent to the battery module to use the fire extinguishing agent to extinguish the fire when the fire extinguishing trigger condition of the battery module is reached.

[0014] Preferably, the fire extinguishing agent includes solid particles composed of metal oxides and carbonates. After the fire extinguishing device is activated, the solid particles can absorb a portion of the heat released by the fire source.

[0015] Preferably, the fire extinguishing triggering conditions of the battery module include one or more of voltage abnormality, temperature abnormality, and temperature rise abnormality.

[0016] Compared with the prior art, the battery fire extinguishing protection system of the utility model is provided with a control device. When a battery module reaches the fire extinguishing trigger condition, the fire extinguishing device on the battery module and the battery modules adjacent to the battery module is triggered to extinguish the fire, thereby preventing the fire from spreading quickly to adjacent modules, greatly improving the reliability of battery safety protection and significantly improving the fire extinguishing effect of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the structure of the battery fire extinguishing protection system according to an embodiment of the utility model;

[0019] Figure 2 for Figure 1A schematic diagram of a battery module and related components in the battery fire extinguishing protection system shown;

[0020] Figure 3 for Figure 2 An enlarged view of a fire extinguishing device and a thermal wire in a battery module and related components is shown;

[0021] Figure 4 for Figure 3 Bottom view of the fire extinguishing device shown. DETAILED DESCRIPTION

[0022] In order 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 part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0024] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0026] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0027] like Figures 1 to 4 As shown, the embodiment of the utility model provides a battery fire extinguishing protection system, wherein the battery comprises a plurality of battery modules 1 ( Figure 1 Only three of them are drawn), and each battery module is provided with a pressure relief hole.

[0028] The battery fire extinguishing protection system includes a plurality of fire extinguishing devices 2, a fire extinguishing pipeline 3, and a control device 4.

[0029] The fire extinguishing pipe 3 is connected to each fire extinguishing device 2, and is used to store the fire extinguishing agent and transport the fire extinguishing agent to each fire extinguishing device. In this embodiment, the fire extinguishing agent can be solid particles composed of metal oxides and carbonates. After the fire extinguishing device is activated, the solid particles can absorb a portion of the heat released by the fire source, the temperature of the flame can be reduced, and the heat radiated to the combustion surface and used to crack the already vaporized combustible molecules into free radicals will be reduced, and the combustion reaction will be suppressed to a certain extent. The fire extinguishing pipe 3 can be installed together with the metal bar (currently mainly copper bar) connecting each battery module 1 in series, and the two can also be combined together, that is, the fire extinguishing pipe is made of metal material and serves as a conductor for electrically connecting each battery module.

[0030] Each fire extinguishing device 2 is installed on each battery module, and each fire extinguishing device 2 is provided with a nozzle 21 facing the pressure relief hole (three nozzles are provided in this embodiment, such as Figure 3 , Figure 4 As shown), it is used to spray the fire extinguishing material produced by the fire extinguishing agent into the battery module 1 through the nozzle 21 and the pressure relief hole.

[0031] Each fire extinguishing device 2 stores an aerosol generator, and a heat-sensitive wire 5 is installed using the installation hole 22, so that when the battery module catches fire, the heat-sensitive wire 5 can be ignited and activate the aerosol generator to generate aerosol to extinguish the fire. The particle size of the fire extinguishing aerosol is very small (10 -9 ~10 -6 m), has a large surface area and surface energy, can absorb active groups in combustion, and produce chemical reactions, consume a large number of active groups, and reduce combustion free radicals. In this embodiment, the thermal line is arranged along the length direction of the battery module and covers the entire length direction, so that it can sense the fire in time and quickly extinguish the fire.

[0032] The control device 4 (which may adopt an existing BMS, i.e., a battery management system) is connected to each fire extinguishing device 2 via a communication line 6, and is used to trigger the fire extinguishing device 2 on the battery module 1 and the battery module adjacent to the battery module to extinguish the fire using a fire extinguishing agent when a certain battery module 1 reaches a fire extinguishing trigger condition (i.e., thermal runaway). The fire extinguishing trigger condition may include one or more of voltage abnormality, temperature abnormality, and temperature rise abnormality.

[0033] This embodiment can realize passive protection, active protection, and linked fire extinguishing, achieving three-layer protection. Specifically, passive protection is that when the battery module has thermal runaway, the thermistor wire is ignited and activates the aerosol generator to produce aerosol for fire extinguishing; active protection is that when the battery module has thermal runaway, the control device triggers the battery module to extinguish the fire; linked fire extinguishing is that when the battery module has thermal runaway, the control device triggers the battery module adjacent to the battery module to extinguish the fire, achieving fire prevention before it burns, and can prevent the fire from spreading quickly to adjacent modules, greatly improving the reliability of battery safety protection, and significantly improving the fire extinguishing effect of the battery. Of course, in other embodiments, passive protection may not be used.

[0034] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be 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 the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery fire extinguishing protection system, wherein the battery comprises a plurality of battery modules connected in series, characterized in that: The system includes multiple fire extinguishing devices and a control device; each of the fire extinguishing devices is installed on each battery module respectively; the control device is connected to each fire extinguishing device, and is used to trigger the fire extinguishing devices on the battery module and the battery modules adjacent to the battery module to extinguish the fire when a certain battery module reaches the fire extinguishing trigger condition; the system also includes a fire extinguishing pipeline, which is connected to each fire extinguishing device and is used to store the fire extinguishing agent and transport the fire extinguishing agent to each fire extinguishing device; each battery module is provided with a pressure relief hole, and each of the fire extinguishing devices is provided with a nozzle facing the pressure relief hole, which is used to spray the fire extinguishing material generated by the fire extinguishing agent into the battery module through the nozzle and the pressure relief hole.

2. The battery fire extinguishing protection system according to claim 1, characterized in that: The fire extinguishing agent includes solid particles composed of metal oxides and carbonates. After the fire extinguishing device is activated, the solid particles can absorb a part of the heat released by the fire source.

3. The battery fire extinguishing protection system according to claim 1, characterized in that: It also includes multiple thermosensitive wires, each of which is installed on a corresponding fire extinguishing device. The fire extinguishing device stores an aerosol generator. When extinguishing a fire, the aerosol generator is ignited and activated by the thermosensitive wire, and then generates an aerosol through an oxidation-reduction reaction to adsorb and consume the active groups in the combustion.

4. The battery fire extinguishing protection system according to claim 3, characterized in that: Each of the thermal sensitive wires is arranged along the length direction of the battery module and covers the entire length direction.

5. The battery fire extinguishing protection system according to any one of claims 1 to 4, characterized in that: The fire extinguishing triggering condition of the battery module includes one or more of voltage abnormality, temperature abnormality, and temperature rise abnormality.

6. A battery fire extinguishing protection system, wherein the battery comprises a plurality of battery modules connected in series, each battery module is provided with a pressure relief hole, characterized in that: The system includes multiple fire extinguishing devices, fire extinguishing pipes, a control device, and multiple thermal wires; the fire extinguishing pipes are connected to the fire extinguishing devices, and are used to store fire extinguishing agents and transport the fire extinguishing agents to the fire extinguishing devices; each of the fire extinguishing devices is installed on each battery module respectively, and each of the fire extinguishing devices is provided with a nozzle facing the pressure relief hole, and is used to spray the fire extinguishing material generated by the fire extinguishing agent into the battery module through the nozzle and the pressure relief hole, and each of the fire extinguishing devices stores an aerosol generating agent; each of the thermal wires is correspondingly installed on each fire extinguishing device, so that when the battery module catches fire, the thermal wire can be ignited and activate the aerosol generating agent to generate aerosol for fire extinguishing; the control device is connected to each fire extinguishing device, and is used to trigger the fire extinguishing devices on the battery module and the battery modules adjacent to the battery module to use the fire extinguishing agent to extinguish the fire when the fire extinguishing trigger condition of a certain battery module is reached.

7. The battery fire extinguishing protection system according to claim 6, characterized in that: The fire extinguishing agent includes solid particles composed of metal oxides and carbonates. After the fire extinguishing device is activated, the solid particles can absorb a part of the heat released by the fire source.

8. The battery fire extinguishing protection system according to claim 6, characterized in that: The fire extinguishing triggering condition of the battery module includes one or more of voltage abnormality, temperature abnormality, and temperature rise abnormality.

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