Cold plate structure for fixed-point fire fighting in battery pack and method thereof

Abstract

The invention belongs to the technical field of energy storage batteries, and particularly relates to a cold plate structure for fixed-point fire fighting in a battery pack and a method thereof.The cold plate structure comprises the battery pack, and a battery pack fire fighting mechanism is arranged at the bottom of the battery pack; the battery fire-fighting mechanism comprises a cooling plate, the cooling plate is located at the bottom of a battery pack and located below a battery, a cooling cavity is formed in an inner cavity of the cooling plate, the battery fire-fighting mechanism further comprises a fire-fighting channel, and the fire-fighting channel is formed in the inner surface of the cooling plate. And a fire-fighting spraying hole is formed in the surface, located on the inner side of the battery pack, of the fire-fighting channel. According to the cold plate structure and method for fixed-point fire fighting in the battery pack, a battery management system is matched with a valve and a fire fighting intervention opening for use, starting and stopping of a fire fighting channel are effectively controlled, then through matched use of a cooling plate, the fire fighting channel and a fire fighting spraying hole, fire extinguishing in the battery pack of the layer is achieved, and fire fighting efficiency is improved. Therefore, the fixed-point fire-fighting effect in the battery pack is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage batteries, and in particular to a cold plate structure and method for fixed-point fire protection inside a battery pack. Background Art

[0002] In existing battery systems, there are usually two forms of fire protection. First, a fire protection structure is installed on the top of the container. When safety problems such as fire caused by thermal runaway occur, the fire protection system will indiscriminately extinguish the fire according to instructions, so that the entire battery cabinet is contaminated by the medium, and more medium is consumed. In this case, all battery packs in the cabinet and all fire protection media are lost; second, the battery pack liquid cold plate is equipped with a fire protection passage. When safety problems such as fire caused by thermal runaway occur, the control system instructions will control the opening of the fire protection passages of the thermal runaway level electric box and the upper level electric box. After the fire protection medium of the upper level is sprayed out from the cold plate of the electric box on this layer, it flows into the battery cell thermal runaway electric box through the internal nozzle of the fire protection passage, covering the thermal runaway battery cell, reducing the temperature and isolating oxygen, thereby achieving the effect of fixed-point fire protection of the thermal runaway electric box of the next level.

[0003] The following problems may exist in the actual operation of the battery pack fire protection:

[0004] When the temperature inside the battery pack becomes abnormal, fire-fighting fluid will be injected through the fire-fighting channel to extinguish the fire in the electrical box at the thermal runaway level. Since each layer of battery packs is composed of multiple battery packs, concentrating on extinguishing and cooling the batteries in that layer will waste a large amount of fire-fighting fluid, and the battery packs on the same layer that are not in thermal runaway will also be soaked by the fire-fighting fluid. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the inventors conducted in-depth research and completed the present invention after paying a lot of creative work.

[0006] Specifically, the technical problem to be solved by the present invention is to provide a cold plate structure and method for fixed-point fire protection inside a battery pack, so as to solve the current technical problem that when thermal runaway occurs in the battery pack, a fire extinguishing solution will be injected into the entire battery pack.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] A cold plate structure and method for fixed-point fire protection inside a battery pack, comprising a battery pack, wherein a battery pack fire protection mechanism is provided at the bottom of the battery pack;

[0009] The battery fire protection mechanism includes a cooling plate. The liquid cooling plate is located at the bottom of the battery pack and below the battery. A cooling chamber is provided in the inner cavity of the cooling plate.

[0010] As an improved technical solution, the battery fire protection mechanism further includes a fire protection passage, and a fire protection spray hole is provided on the surface of the fire protection passage located on the inner side of the battery pack.

[0011] As an improved technical solution, the battery fire protection mechanism further includes a fire protection access port, the bottom of which is connected to the top of the cooling plate, and a valve is fixedly installed on the outer surface of the fire protection access port.

[0012] A battery pack, wherein the steps of the cold plate method for fixed-point fire protection inside the battery pack are as follows:

[0013] S1. After the system detects that the temperature of the battery cells inside the box is abnormal, resulting in thermal runaway, the system controls the valve on the fire access port of the box to open the channel;

[0014] S2. The fire-fighting medium enters the interior of the liquid cooling plate through the fire-fighting medium inlet, passes through the fire-fighting medium branch channel in the cooling plate, and is sprayed into the interior of the thermal runaway electric box through the provided fire-fighting medium spraying through hole;

[0015] S3. After the fire-fighting medium is sprayed out from the cold plate of the electric box on this layer, it flows into the thermal runaway electric box of this layer of battery cells through the internal spray port of the fire-fighting channel, covers the thermal runaway battery cells, reduces the temperature and isolates oxygen, thereby achieving the effect of fixed-point fire-fighting.

[0016] After adopting the above technical solution, the beneficial effects of the present invention are:

[0017] Through the design of the fire intervention port, the present invention can achieve fixed-point fire protection at the thermal runaway electrical box level, avoiding the loss of the entire electrical cabinet level and the consumption of a large amount of fire protection media, achieving precise fixed-point fire protection, reducing fire protection costs, and reducing the huge losses caused by fire protection; and according to the needs of the fire protection scene, the next-level fire protection flow channel is matched to achieve the purpose of fixed-point fire protection at this level and the next level. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0019] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the cold plate structure and method for fixed-point fire protection inside the battery pack of the present invention.

[0020] Figure 2 A schematic diagram of the three-dimensional structure of a battery pack and a cooling plate of the cold plate structure and method for fixed-point fire protection inside a battery pack of the present invention.

[0021] Figure 3 It is a schematic diagram of a three-dimensional cross-sectional structure of a cooling plate of a cold plate structure and method for fixed-point fire protection inside a battery pack of the present invention.

[0022] Figure 4 The cold plate structure and method for fixed-point fire protection inside the battery pack of the present invention Figure 3 A is an enlarged view of the structure.

[0023] Description of reference numerals:

[0024] 1. Battery pack; 2. Battery fire protection mechanism; 21. Cooling plate; 22. Fire protection passage; 23. Cooling chamber; 24. Fire protection spray hole; 25. Fire protection access port. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0028] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] like Figure 1 and Figure 3As shown together, this embodiment provides a cold plate structure and method for fixed-point fire protection inside a battery pack, and the cold plate structure and method for fixed-point fire protection inside a battery pack include a battery pack 1, and a battery pack fire protection mechanism 2 is provided at the bottom of the battery pack 1;

[0030] The battery fire protection mechanism 2 includes a cooling plate 21 . The liquid cooling plate 21 is located at the bottom of the battery pack 1 and below the battery. A cooling chamber 23 is provided in the inner cavity of the cooling plate 21 .

[0031] like Figure 3 and Figure 4 As shown together, the battery fire fighting mechanism 2 further includes a fire fighting passage 22 , and a fire fighting spray hole 24 is opened on the surface of the fire fighting passage 22 located on the inner side of the battery pack 1 .

[0032] like Figure 1 As shown, the battery fire protection mechanism 2 further includes a fire protection access port 25 , and the bottom of the fire protection access port 25 is connected to the top of the cooling plate 21 .

[0033] A battery pack, comprising steps of a cold plate method for fixed-point fire protection inside the battery pack:

[0034] S1. After the system detects that the temperature of the battery cells inside the box is abnormal, resulting in thermal runaway, the system controls the valve on the fire access port of the box to open the channel;

[0035] S2. The fire-fighting medium enters the interior of the liquid cooling plate through the fire-fighting medium inlet, passes through the fire-fighting medium branch channel in the cooling plate, and is sprayed into the interior of the thermal runaway electric box through the provided fire-fighting medium spraying through hole;

[0036] S3. After the fire-fighting medium is sprayed out from the cold plate of the electric box on this layer, it flows into the thermal runaway electric box of this layer of battery cells through the internal spray port of the fire-fighting channel, covers the thermal runaway battery cells, reduces the temperature and isolates oxygen, thereby achieving the effect of fixed-point fire-fighting.

[0037] During use, when the temperature inside the battery pack 1 is abnormal, the battery management system will be used in conjunction with the fire intervention port 25 to effectively control the start and stop of the fire passage 22, and then the cooling plate 21 and the fire passage 22 will be used in conjunction with the fire spray hole 24 to extinguish the fire in the battery pack 1 on this layer, so as to achieve the effect of fixed-point fire protection inside the battery pack.

[0038] It should be understood that the purpose of these embodiments is only to illustrate the present invention and is not intended to limit the protection scope of the present invention. In addition, it should also be understood that after reading the technical content of the present invention, those skilled in the art can make various changes, modifications and / or deformations to the present invention, and all of these equivalent forms also fall within the protection scope defined by the appended claims of this application.

Claims

1. A cold plate structure for fixed-point fire protection inside a battery pack, comprising a battery pack (1), characterized in that: The bottom of the battery pack (1) is provided with a battery pack fire protection mechanism (2); The battery fire protection mechanism (2) comprises a cooling plate (21), wherein the liquid cooling plate (21) is located at the bottom of the battery pack and below the battery, and a cooling chamber (23) is provided in the inner cavity of the cooling plate (21).

2. The cold plate structure for fixed-point fire protection inside the battery pack according to claim 1, characterized in that: The battery fire fighting mechanism (2) further comprises a fire fighting passage (22), and a fire fighting outlet (24) is provided on the surface of the fire fighting passage (22) located inside the battery pack (1).

3. The cold plate structure for fixed-point fire protection inside the battery pack according to claim 1, characterized in that: The battery fire protection mechanism (2) further comprises a fire protection access opening (25), the bottom of which is connected to the top of the cooling plate (21).

4. A battery pack, characterized in that: The steps of the cold plate method for fixed-point fire protection inside the battery pack as described in any one of claims 1 to 3: S1. After the system detects that the temperature of the battery cells inside the box is abnormal, resulting in thermal runaway, the system controls the valve on the fire access port of the box to open the channel; S2. The fire-fighting medium enters the interior of the liquid cooling plate through the fire-fighting medium inlet, passes through the fire-fighting medium branch channel in the cooling plate, and is sprayed into the interior of the thermal runaway electric box through the provided fire-fighting medium spraying through hole; S3. After the fire-fighting medium is sprayed out from the cold plate of the electric box on this layer, it flows into the thermal runaway electric box of this layer of battery cells through the internal spray port of the fire-fighting channel, covers the thermal runaway battery cells, reduces the temperature and isolates oxygen, thereby achieving the effect of fixed-point fire-fighting.

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