New energy automobile power battery pack with fire extinguishing and explosion preventing functions

Abstract

The utility model discloses a new energy automobile power battery pack with fire extinguishing and explosion-proof functions, which comprises a battery pack body, the battery pack body comprises a lower box body, an upper box cover and a battery monomer group, the lower box body and the upper box cover can be buckled with each other to form a mounting cavity, and the battery monomer group is mounted in the mounting cavity; the fire extinguishing device comprises a first shell and a fire extinguishing agent, and the first shell is installed on the upper box cover; the fire extinguishing agent is installed in the first shell, and the first shell is configured to be rupturable so that the fire extinguishing agent can be sprayed to the outside of the first shell. The fire extinguishing device is mounted on the battery pack body, when the battery monomer group is overheated or has an initial fire hazard, the fire extinguishing device can quickly respond, and the first shell is broken, so that a fire extinguishing agent can be immediately sprayed out of the first shell to wrap the battery pack body and cool the battery pack body, and thermal runaway caused by overheat of the battery pack body is prevented; therefore, the use safety of the new energy automobile is improved.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicle parts technology, specifically to a new energy vehicle power battery pack with fire extinguishing and explosion-proof functions. Background Technology

[0002] With the booming development of the electric vehicle industry, the safety of power batteries, as a core component of electric vehicles, has received increasing attention. In particular, the potential for fires caused by thermal runaway of power batteries has become one of the key factors restricting the further popularization of electric vehicles. The main characteristics of power battery fires are rapid spread and difficulty in extinguishing. Because power batteries contain a large amount of flammable electrolytes and electrode materials, once thermal runaway occurs, the fire will spread rapidly and is difficult to extinguish using conventional firefighting methods. Furthermore, power battery fires can also trigger explosions, posing a significant threat to people and property. Therefore, a structure is needed that can cool the automotive power battery in the early stages of overheating, preventing further temperature increases and avoiding explosions that could threaten people and property. Utility Model Content

[0003] This invention provides a new energy vehicle power battery pack with fire extinguishing and explosion-proof functions to solve the problem of difficulty in timely cooling of the initial stage of overheating of the vehicle power battery in the prior art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A new energy vehicle power battery pack with fire extinguishing and explosion-proof functions includes:

[0006] The battery pack body includes a lower housing, an upper housing cover, and a battery cell assembly. The lower housing and the upper housing cover can be interlocked to form a mounting cavity, and the battery cell assembly is installed in the mounting cavity.

[0007] A fire extinguishing device, comprising a first housing and a fire extinguishing agent, the first housing being mounted on an upper cover; the fire extinguishing agent being enclosed within the first housing, and the first housing being configured to be ruptureable to allow the fire extinguishing agent to be sprayed to the outside of the first housing.

[0008] According to the above-mentioned technical means, a fire extinguishing device is installed on the battery pack body. When the battery cell group overheats or has an initial fire, the fire extinguishing device can respond quickly. The first shell breaks, allowing the fire extinguishing agent to be sprayed immediately outside the first shell to wrap the battery pack body, cool the battery pack body, and prevent thermal runaway caused by overheating of the battery pack body, thereby increasing the safety of new energy vehicle use.

[0009] Meanwhile, the fire extinguishing device of this utility model has the extinguishing agent enclosed by the first shell, which has a simple structure and low cost. At the same time, the fire extinguishing device is small in size, easy to assemble, and has high assembly efficiency, without requiring changes to the existing battery pack structure.

[0010] Furthermore, the fire extinguishing device also includes a blasting component installed within the first housing and configured to detonate upon impact with the battery pack body, thereby causing the first housing to rupture.

[0011] According to the above-mentioned technical means, the blasting component can respond quickly when the battery pack body is impacted, so that the extinguishing agent is sprayed outward after the first shell breaks. It has high efficiency and reliability, and makes the cooling of the battery pack body automatic and instantaneous, so that the battery pack body can be cooled without manual operation.

[0012] Furthermore, the blasting assembly includes a second housing, a detonator, and an ignition assembly, wherein the detonator and the ignition assembly are installed inside the second housing; the detonator and the ignition assembly are connected by a first lead, so that the ignition assembly can detonate the detonator through the first lead.

[0013] According to the above technical means, the second housing separates the detonator and the ignition assembly from the extinguishing agent, avoiding direct contact between the extinguishing agent and the detonator and the ignition assembly, thus ensuring the effectiveness of the detonator and the ignition assembly; the ignition assembly detonates the detonator through the first lead, which can cause the first housing to break open due to the explosive force, quickly releasing the extinguishing agent and improving the efficiency and effectiveness of cooling the battery pack body.

[0014] Furthermore, the ignition assembly includes a second lead, a friction head, and an igniter. One end of the second lead is installed on the inner wall of the first housing, and the other end passes through the second housing and is installed on the friction head. The igniter is distributed on the inner wall of the second housing and is configured to be rubbed by the friction head to ignite the first lead through friction.

[0015] According to the above-mentioned technical means, when the battery pack body is impacted, it causes the first housing to shake, which allows the second lead to drive the friction head to rub against the igniting propellant distributed on the inner wall of the second housing, further igniting the first lead and enabling the blasting component to blast the first housing in a short time, thereby further improving the cooling efficiency of the fire extinguishing device.

[0016] Furthermore, a partition plate is formed inside the second housing, and the detonator and the ignition assembly are located on opposite sides of the partition plate; the first lead passes through the partition plate, and its two ends are respectively connected to the detonator and the ignition assembly.

[0017] According to the above technical means, the separator separates the ignition component and the detonator, avoiding direct contact between the detonator and the ignition component, ensuring the stability of the detonator, and preventing the detonator from directly rubbing against the igniter and causing an explosion when the battery pack does not need to be cooled.

[0018] Furthermore, the fire extinguishing device also includes a fixing member, one end of which is installed on the inner wall of the first housing and the other end is installed on the second housing to fix the second housing inside the first housing.

[0019] According to the above-mentioned technical means, the fastener can securely install the second housing inside the first housing, thereby increasing the stability of the second housing installed inside the first housing.

[0020] Furthermore, the first shell is made of waxed paper, and the melting point of the waxed paper is 65°C.

[0021] According to the above-mentioned technical means, when the temperature around the first shell reaches 65°C, the first shell can quickly melt and crack to release the fire extinguishing agent, which has a high-efficiency cooling capacity; and the wax paper has low cost, making the fire extinguishing device economical.

[0022] Furthermore, a first mounting hole is formed on the lower housing, and a second mounting hole is formed on the upper housing cover. The system also includes a bolt, which passes through the first mounting hole and the second mounting hole and is then locked in place by a nut to lock the upper housing cover and the lower housing together.

[0023] According to the above-mentioned technical means, the upper cover and the lower box body can be firmly installed together by the mutual cooperation and locking of bolts and nuts, which increases the structural stability of the battery pack body; and the fastening method of mutual cooperation of bolts and nuts is simple and convenient, and easy to disassemble and replace.

[0024] Furthermore, the battery pack body also includes a battery management module, which is installed on the lower housing and is used to manage the working status of the battery pack body.

[0025] Based on the above-mentioned technical means, the battery management module can manage the working status of the battery pack body and improve the overall reliability of the battery pack.

[0026] Furthermore, the extinguishing agent is a dry powder extinguishing agent, a carbon dioxide extinguishing agent, or a foam extinguishing agent.

[0027] According to the above-mentioned technical means, the fire extinguishing agent has a high cooling speed and cooling effect, and can quickly cool down the battery pack body.

[0028] Beneficial effects:

[0029] 1. This utility model installs a fire extinguishing device on the battery pack body. When the battery cell group overheats or has an initial fire, the fire extinguishing device can respond quickly. The first shell breaks, allowing the fire extinguishing agent to be sprayed immediately outside the first shell to wrap the battery pack body, cool the battery pack body, and prevent thermal runaway caused by overheating of the battery pack body, thereby increasing the safety of new energy vehicle use.

[0030] 2. The fire extinguishing device of this utility model consists of the fire extinguishing agent encased in the first shell. It has a simple structure and low cost. At the same time, the fire extinguishing device is small in size, easy to assemble, and has high assembly efficiency, without requiring any changes to the existing battery pack structure. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the battery pack of this utility model;

[0032] Figure 2 This is a partial structural cross-sectional view of the fire extinguishing device of this utility model.

[0033] Figure label:

[0034] 100. Battery pack body; 110. Lower casing; 111. First mounting hole; 120. Upper casing cover; 121. Second mounting hole; 130. Battery cell assembly; 140. Battery management module; 200. Fire extinguishing device; 210. First housing; 220. Extinguishing agent; 231. Second housing; 2311. Separator; 232. Detonator; 233. Ignition assembly; 2331. Second lead; 2332. Friction head; 2333. Ignition powder; 234. First lead; 240. Fixing component.

[0035] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The same or similar reference numerals correspond to the same or similar components. The terms describing positional relationships in the drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. Detailed Implementation

[0036] The embodiments of this utility model will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be understood that the preferred embodiments are only for illustrating this utility model and not for limiting the scope of protection of this utility model.

[0037] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0038] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0039] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0040] like Figure 1 and Figure 2 As shown, this embodiment provides a new energy vehicle power battery pack with fire extinguishing and explosion-proof functions, including: a battery pack body 100, the battery pack body 100 including a lower housing 110, an upper housing cover 120 and a battery cell group 130, the lower housing 110 and the upper housing cover 120 can be interlocked to form an installation cavity, and the battery cell group 130 is installed in the installation cavity; a fire extinguishing device 200, the fire extinguishing device 200 including a first housing 210 and a fire extinguishing agent 220, the first housing 210 being installed on the upper housing cover 120; the fire extinguishing agent 220 being enclosed inside the first housing 210, and the first housing 210 being configured to be ruptureable so that the fire extinguishing agent 220 can be sprayed to the outside of the first housing 210.

[0041] A fire extinguishing device 200 is installed on the battery pack body 100. When the battery cell group 130 overheats or has an initial fire, the fire extinguishing device 200 can respond quickly. The first housing 210 breaks, allowing the fire extinguishing agent 220 to be sprayed out of the first housing 210 immediately to wrap the battery pack body 100 and cool it down. This prevents thermal runaway caused by overheating of the battery pack body 100, which could lead to an explosion and increases the safety of new energy vehicles.

[0042] Meanwhile, the fire extinguishing device 200 of this utility model is made up of the extinguishing agent 220 enclosed by the first shell 210. It has a simple structure and low cost. At the same time, the fire extinguishing device 200 is small in size, easy to assemble, and has high assembly efficiency, without the need to change the existing battery pack structure.

[0043] like Figure 2 As shown, in this embodiment, the fire extinguishing device 200 further includes a rupture assembly installed within the first housing 210 and configured to detonate upon impact with the battery pack body 100, causing the first housing 210 to rupture. The rupture assembly responds rapidly upon impact with the battery pack body 100, spraying the extinguishing agent 220 outwards after the first housing 210 ruptures. This provides high efficiency and reliability, and automates and instantly cools the battery pack body 100 without manual intervention.

[0044] like Figure 2 As shown, in this embodiment, the blasting assembly includes a second housing 231, a detonator 232, and an ignition assembly 233. The detonator 232 and the ignition assembly 233 are installed inside the second housing 231. The detonator 232 and the ignition assembly 233 are connected by a first lead 234, so that the ignition assembly 233 can detonate the detonator 232 through the first lead 234. The second housing 231 separates the detonator 232 and the ignition assembly 233 from the extinguishing agent 220, preventing the extinguishing agent 220 from directly contacting the detonator 232 and the ignition assembly 233, thus ensuring the effectiveness of the detonator 232 and the ignition assembly 233. The ignition assembly 233 detonates the detonator 232 through the first lead 234, which causes the first housing 210 to rupture due to the explosive force, rapidly releasing the extinguishing agent 220 and improving the efficiency and effectiveness of cooling the battery pack body 100.

[0045] like Figure 2As shown, in this embodiment, the ignition assembly 233 includes a second lead 2331, a friction head 2332, and an igniter 2333. One end of the second lead 2331 is installed on the inner wall of the first housing 210, and the other end passes through the second housing 231 and is then installed with the friction head 2332. The igniter 2333 is distributed on the inner wall of the second housing 231 and is configured to be rubbed by the friction head 2332 to ignite the first lead 234. When the battery pack body 100 is impacted, it causes the first housing 210 to shake, allowing the second lead 2331 to drive the friction head 2332 to rub against the igniter 2333 distributed on the inner wall of the second housing 231, further igniting the first lead 234. This allows the blasting assembly to blast the first housing 210 in a short time, further improving the cooling efficiency of the fire extinguishing device 200.

[0046] like Figure 2 As shown, in this embodiment, a partition plate 2311 is formed inside the second housing 231, and the detonator 232 and the ignition assembly 233 are located on opposite sides of the partition plate 2311. The first lead 234 passes through the partition plate 2311, and its two ends are connected to the detonator 232 and the ignition assembly 233, respectively. The partition plate 2311 separates the ignition assembly 233 and the detonator 232, avoiding direct contact between the detonator 232 and the ignition assembly 233, ensuring the stability of the detonator 232, and preventing the detonator 232 from directly rubbing against the igniter 2333 and causing an explosion when the battery pack does not need to be cooled.

[0047] like Figure 2 As shown, in this embodiment, the fire extinguishing device 200 further includes a fixing member 240. One end of the fixing member 240 is installed on the inner wall of the first housing 210, and the other end is installed on the second housing 231 to fix the second housing 231 inside the first housing 210. The fixing member 240 can stably install the second housing 231 inside the first housing 210, increasing the stability of the second housing 231 installed inside the first housing 210.

[0048] In this embodiment, the first housing 210 is made of waxed paper, which has a melting point of 65°C. When the temperature around the first housing 210 reaches 65°C, the first housing 210 can quickly melt and crack to release the extinguishing agent 220, thus having a high-efficiency cooling capability; moreover, the waxed paper is low in cost, making the fire extinguishing device 200 economical.

[0049] like Figure 1As shown, in this embodiment, a first mounting hole 111 is formed on the lower housing 110, and a second mounting hole 121 is formed on the upper housing cover 120. The system also includes bolts, which pass through the first mounting hole 111 and the second mounting hole 121 and are then locked in place by nuts to secure the upper housing cover 120 and the lower housing 110 together. The mutual locking of the bolts and nuts ensures that the upper housing cover 120 and the lower housing 110 are firmly installed together, increasing the structural stability of the battery pack body 100. Furthermore, the bolt and nut fastening method is simple and convenient, facilitating disassembly and replacement.

[0050] like Figure 1 As shown, in this embodiment, the battery pack body 100 also includes a battery management module 140, which is installed on the lower housing 110 and is used to manage the working state of the battery pack body 100. The battery management module 140 can manage the working state of the battery pack body 100, improving the overall reliability of the battery pack; in addition, the battery management module 140 can also stop the discharge of the battery cell group 130 when the battery cell group 130 reaches a high temperature, avoiding excessive heat generation and safety accidents, and maximizing the safety of personnel and property.

[0051] In this embodiment, the extinguishing agent 220 is a dry powder extinguishing agent, a carbon dioxide extinguishing agent, or a foam extinguishing agent. The extinguishing agent 220 has a high cooling speed and cooling effect, and can quickly cool down the battery pack body 100.

[0052] It is worth mentioning that, in this embodiment, the fire extinguishing device 200 has the following two operating modes:

[0053] The first type:

[0054] When the battery pack body 100 is exposed to high temperatures inside or outside, and the temperature of the fire extinguishing device 200 reaches 65°C, the first housing 210 of the fire extinguishing device 200, which is made of wax paper, melts and breaks open, causing the extinguishing agent 220 inside the first housing 210 to be sprayed outward, thereby achieving the purpose of cooling and extinguishing the fire.

[0055] The second type:

[0056] When the battery pack body 100 is violently impacted, the second lead 2331 in the fire extinguishing device 200 is pulled. Even if the first housing 210 has not melted, the second lead 2331 can be pulled to cause the friction head 2332 to rub against the igniting agent 2333, thereby igniting the first lead 234, which in turn ignites the detonator 232 and causes it to explode. The first housing 210 can also be ruptured under the explosion of the detonator 232, causing the extinguishing agent 220 to be sprayed out of the first housing 210 to achieve the purpose of cooling and extinguishing the fire.

[0057] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A new energy vehicle power battery pack with fire extinguishing and explosion-proof functions, characterized in that, include: The battery pack body (100) includes a lower housing (110), an upper housing cover (120), and a battery cell assembly (130). The lower housing (110) and the upper housing cover (120) can be interlocked to form a mounting cavity, and the battery cell assembly (130) is installed in the mounting cavity. A fire extinguishing device (200) comprising a first housing (210) and a fire extinguishing agent (220), the first housing (210) being mounted on the upper cover (120); the fire extinguishing agent (220) being enclosed inside the first housing (210), and the first housing (210) being configured to be ruptureable to allow the fire extinguishing agent (220) to be sprayed outside the first housing (210).

2. A new energy vehicle power battery pack with fire extinguishing and explosion-proof functions according to claim 1, characterized in that, The fire extinguishing device (200) further includes a blasting assembly installed within the first housing (210) and configured to detonate upon impact with the battery pack body (100), thereby causing the first housing (210) to rupture.

3. A new energy vehicle power battery pack with fire extinguishing and explosion-proof functions according to claim 2, characterized in that, The blasting assembly includes a second housing (231), a detonator (232), and an ignition assembly (233). The detonator (232) and the ignition assembly (233) are installed inside the second housing (231). The detonator (232) and the ignition assembly (233) are connected by a first lead (234) so ​​that the ignition assembly (233) can detonate the detonator (232) through the first lead (234).

4. A new energy vehicle power battery pack with fire extinguishing and explosion-proof functions according to claim 3, characterized in that, The ignition assembly (233) includes a second lead (2331), a friction head (2332), and an igniter (2333). One end of the second lead (2331) is installed on the inner wall of the first housing (210), and the other end passes through the second housing (231) and is then installed on the friction head (2332). The igniter (2333) is distributed on the inner wall of the second housing (231) and is configured to be rubbed by the friction head (2332) to ignite the first lead (234) by friction.

5. A new energy vehicle power battery pack with fire extinguishing and explosion-proof functions according to claim 4, characterized in that, A partition plate (2311) is formed inside the second housing (231), and the detonator (232) and the ignition assembly (233) are located on opposite sides of the partition plate (2311); the first lead (234) passes through the partition plate (2311) and is connected at both ends to the detonator (232) and the ignition assembly (233).

6. A new energy vehicle power battery pack with fire extinguishing and explosion-proof functions according to claim 3, characterized in that, The fire extinguishing device (200) also includes a fixing member (240), one end of which is installed on the inner wall of the first housing (210) and the other end is installed on the second housing (231) to fix the second housing (231) inside the first housing (210).

7. A new energy vehicle power battery pack with fire extinguishing and explosion-proof functions according to any one of claims 1-6, characterized in that, The first housing (210) is waxed paper, and the melting point of the waxed paper is 65°C.

8. A new energy vehicle power battery pack with fire extinguishing and explosion-proof functions according to claim 1, characterized in that, The lower housing (110) has a first mounting hole (111), and the upper housing cover (120) has a second mounting hole (121). The housing also includes a bolt, which passes through the first mounting hole (111) and the second mounting hole (121) and is then locked by a nut to lock the upper housing cover (120) and the lower housing (110) together.

9. A new energy vehicle power battery pack with fire extinguishing and explosion-proof functions according to claim 1, characterized in that, The battery pack body (100) also includes a battery management module (140), which is installed on the lower housing (110) and is used to manage the working status of the battery pack body (100).

10. A new energy vehicle power battery pack with fire extinguishing and explosion-proof functions according to claim 1, characterized in that, The extinguishing agent (220) is a dry powder extinguishing agent, a carbon dioxide extinguishing agent, or a foam extinguishing agent.

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