A battery pack
By incorporating fire extinguishing components into the battery pack and using pressure valves to control the spray nozzles to deliver extinguishing agents, the problem of battery spontaneous combustion has been solved, thus improving the safety of the battery pack.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI CHINT POWER SYST CO LTD
- Filing Date
- 2025-08-12
- Publication Date
- 2026-07-14
AI Technical Summary
When batteries are operating under high load or in high ambient temperatures, the accumulation of internal heat may lead to performance degradation or even spontaneous combustion, posing thermal runaway and safety hazards.
Design a battery pack comprising a housing, a battery module, and a fire extinguishing component. The fire extinguishing component includes a fire extinguishing plate, a sprinkler head, and a pressure valve. When the gas pressure inside the housing reaches a threshold, the pressure valve triggers the sprinkler head to spray extinguishing agent to extinguish spontaneous combustion.
It effectively extinguishes battery spontaneous combustion, reduces the risk of explosion, and improves the safety performance of the battery pack.
Smart Images
Figure CN224484764U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery technology, and in particular to a battery pack. Background Technology
[0002] Liquid-cooled battery packs, as an advanced battery heat dissipation technology, achieve better thermal management effects than air-cooling and direct-cooling technologies through liquid medium circulation. This helps reduce the temperature rise of the battery during high-power discharge or fast charging, thereby ensuring that the battery operates within a suitable temperature range, reducing the risk of thermal runaway, and improving battery performance and lifespan.
[0003] Currently, when batteries operate under high loads or in high ambient temperatures, the accumulation of internal heat can lead to a decline in battery performance or even thermal runaway. In severe cases, spontaneous combustion can occur, posing a significant threat to the safe operation of energy storage systems. Utility Model Content
[0004] The purpose of this invention is to provide a battery pack that can promptly extinguish spontaneous combustion of the battery.
[0005] To achieve this objective, the present invention adopts the following technical solution:
[0006] A battery pack is provided, comprising:
[0007] case;
[0008] The battery module is housed within the casing;
[0009] The fire extinguishing assembly is located inside the housing and above the battery module. The fire extinguishing assembly includes a fire extinguishing plate, a sprinkler head, and a pressure valve. The fire extinguishing plate has a cavity that can hold the fire extinguishing agent. The sprinkler head is located on the side of the fire extinguishing plate facing the battery module and communicates with the cavity. The pressure valve is located inside the sprinkler head.
[0010] When the air pressure inside the casing reaches a threshold, it can trigger the pressure valve to open the spray head.
[0011] Optionally, the housing includes a bottom shell and an upper cover disposed on the bottom shell, with a receiving cavity formed between the upper cover and the bottom shell, and the battery module and the fire extinguishing assembly both disposed within the receiving cavity.
[0012] Optionally, the bottom shell includes a bottom plate and a surrounding plate connected to the bottom plate. The bottom plate is provided with a cooling channel and two connectors communicating with the cooling channel. The top cover is placed on the surrounding plate, and the receiving cavity is formed between the top cover, the surrounding plate and the bottom plate.
[0013] Optionally, the bottom shell is provided with a first perimeter, the top cover is provided with a second perimeter, and the battery pack further includes a sealing ring sandwiched between the first perimeter and the second perimeter.
[0014] Optionally, the battery pack further includes a screw connector, through which the first perimeter and the second perimeter are fastened together.
[0015] Optionally, the battery module is disposed on the bottom shell, and the fire extinguishing plate is disposed on the top cover.
[0016] Optionally, the bottom shell includes a bottom plate and a surrounding plate connected to the bottom plate. The bottom plate is provided with a cooling channel and two connectors communicating with the cooling channel. The top cover is placed on the surrounding plate, and the receiving cavity is formed between the top cover, the surrounding plate and the bottom plate. The battery module is fixed on the bottom plate.
[0017] Optionally, thermally conductive adhesive is provided between the battery module and the base plate.
[0018] Optionally, the upper cover is provided with a plurality of fixing members at intervals, and the fire extinguishing plate is sandwiched between the upper cover and the fixing members.
[0019] Optionally, the fire extinguishing assembly includes a plurality of the spray heads; and / or, the spray heads have a plurality of spray holes.
[0020] Beneficial effects: When the battery module of the battery pack provided by this utility model spontaneously combusts, it will generate a large amount of gas and heat, which will cause the gas pressure inside the shell to increase significantly. When the gas pressure inside the shell reaches the threshold, the pressure valve will be triggered and the spray head will be opened. The extinguishing agent in the cavity of the fire extinguishing plate will be sprayed onto the battery module through the spray head to extinguish the spontaneous combustion of the battery module in time, reduce the risk of battery pack explosion, and help improve the safety performance of the battery pack. Attached Figure Description
[0021] Figure 1 This is an exploded view of the battery pack structure provided by this utility model;
[0022] Figure 2 This is a schematic diagram of the structure of the fire extinguishing component provided by this utility model installed on the top cover;
[0023] Figure 3 This utility model provides Figure 2 Enlarged view of point A in the middle;
[0024] Figure 4 This is a schematic diagram of the bottom shell provided by this utility model;
[0025] Figure 5 This is a partial cross-sectional view of the fire extinguishing component provided by this utility model installed on the top cover.
[0026] In the picture:
[0027] 100. Shell; 110. Bottom shell; 111. Bottom plate; 112. Enclosure plate; 113. Connector; 114. First enclosure; 120. Top cover; 121. Groove; 122. Second enclosure; 130. Fixing element; 131. First plate; 132. Second plate; 133. Third plate;
[0028] 200. Battery module;
[0029] 300 Fire extinguishing assembly; 310 Fire extinguishing plate; 320 Sprinkler head; 321 Sprinkler hole. Detailed Implementation
[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0033] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0034] Reference Figure 1 and Figure 2 As shown, this embodiment provides a battery pack, which includes a housing 100, a battery module 200, and a fire extinguishing component 300.
[0035] Both the battery module 200 and the fire extinguishing assembly 300 are housed within the housing 100, with the fire extinguishing assembly 300 positioned above the battery module 200. The fire extinguishing assembly 300 includes a fire extinguishing plate 310, a sprinkler head 320, and a pressure valve (not shown). The fire extinguishing plate 310 has a cavity (not shown) that can hold the extinguishing agent. The sprinkler head 320 is located on the side of the fire extinguishing plate 310 facing the battery module 200 and communicates with the cavity. The pressure valve is located within the sprinkler head 320.
[0036] In this embodiment, when the gas pressure inside the housing 100 reaches a threshold, it triggers the pressure valve to open the spray head 320. It is understood that when the battery module 200 spontaneously combusts, it generates a large amount of gas and heat, causing a significant increase in the gas pressure inside the housing 100. When the gas pressure inside the housing 100 reaches the threshold, the pressure valve is triggered and the spray head 320 opens. The extinguishing agent in the cavity of the fire extinguishing plate 310 is sprayed onto the battery module 200 through the spray head 320 to extinguish the spontaneous combustion of the battery module 200 in a timely manner, reducing the risk of battery pack explosion and improving the safety performance of the battery pack.
[0037] For example, the battery module 200 includes multiple battery cells (not shown). The battery cells may be arranged in a matrix.
[0038] For example, the material of the housing 100 can be set to metal.
[0039] For example, the fire extinguishing board 310 is made of metal or composite material.
[0040] For example, the housing 100 can be configured as a cuboid and the fire extinguishing plate 310 can be configured as a rectangular plate. Of course, the housing 100 and the fire extinguishing plate 310 can also be configured as other shapes, such as the housing 100 being cylindrical and the fire extinguishing plate 310 being circular. This embodiment does not limit the specific shape.
[0041] For example, the strength of the fire extinguishing plate 310 is higher than that of the housing 100 to reduce the risk of deformation of the fire extinguishing plate 310, which is conducive to the fire extinguishing agent being sprayed more evenly onto the battery module 200 when the pressure valve is opened, so as to extinguish the spontaneous combustion of the battery in time.
[0042] Exemplarily, the fire extinguishing assembly 300 includes multiple spray heads 320. It is understood that a pressure valve is correspondingly installed in each spray head 320. In this embodiment, the arrangement of multiple spray heads 320 facilitates more even spraying of the extinguishing agent onto the battery module 200 when the pressure valve is opened, thereby promptly extinguishing any spontaneous combustion of the battery. The spray heads 320 can be arranged in a matrix configuration, which further facilitates more even spraying of the extinguishing agent onto the battery module 200 when the pressure valve is opened.
[0043] For example, such as Figure 3 As shown, the sprinkler head 320 has multiple spray holes 321. The extinguishing agent is sprayed onto the battery module 200 through the spray holes 321, which helps to spray the extinguishing agent onto the battery module 200 more evenly when the pressure valve is opened, so as to extinguish the spontaneous combustion of the battery in time.
[0044] For example, the extinguishing agent can be a gaseous extinguishing agent, such as heptafluoropropane or carbon dioxide.
[0045] In this embodiment, reference is made to Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the housing 100 includes a bottom shell 110 and an upper cover 120 covering the bottom shell 110. A receiving cavity is formed between the upper cover 120 and the bottom shell 110. The battery module 200 and the fire extinguishing component 300 are both located in the receiving cavity, which facilitates the assembly of the battery pack.
[0046] For example, the bottom shell 110 is made of aluminum or stainless steel.
[0047] For example, the bottom shell 110 is made of aluminum or stainless steel.
[0048] In one feasible implementation, the battery module 200 is disposed on the bottom shell 110, and the fire extinguishing plate 310 is disposed on the top cover 120. Compared to disposing of both the battery module 200 and the fire extinguishing component 300 on the bottom shell 110, disposing of the battery module 200 on the bottom shell 110 and the fire extinguishing plate 310 on the top cover 120 makes it more convenient to assemble the battery pack.
[0049] In one feasible embodiment, the bottom shell 110 includes a bottom plate 111 and a surrounding plate 112 connected to the bottom plate 111, and a top cover 120 is disposed on the surrounding plate 112, and a receiving cavity is formed between the top cover 120, the surrounding plate 112 and the bottom plate 111.
[0050] In some embodiments, the base plate 111 is provided with a cooling channel (not shown) and two connectors 113 communicating with the cooling channel. The two connectors 113 can be connected to a liquid cooling device. The liquid cooling device introduces refrigerant into the cooling channel through one of the two connectors 113, and the refrigerant in the cooling channel flows back to the liquid cooling device through the other of the two connectors 113. The refrigerant in the cooling channel can exchange heat with the battery module 200 to cool the battery module 200, which helps reduce the risk of spontaneous combustion of the battery module 200, and also facilitates the charging and discharging of the battery module 200, thereby increasing the service life of the battery module 200.
[0051] For example, the battery module 200 is fixed on the base plate 111, which is beneficial for the battery module 200 to exchange heat with the refrigerant in the cooling channel.
[0052] For example, thermally conductive adhesive (not shown) is provided between the battery module 200 and the base plate 111, which is beneficial for heat exchange between the battery module 200 and the refrigerant in the cooling channel.
[0053] In one feasible embodiment, the upper cover 120 is provided with a plurality of fasteners 130 at intervals, and the fire extinguishing plate 310 is sandwiched between the upper cover 120 and the fasteners 130 for easy assembly. It is understood that the fasteners 130 are arranged at intervals around the fire extinguishing plate 310.
[0054] Exemplarily, the fastener 130 can be a sheet metal part. In some embodiments, the fastener 130 includes a first plate portion 131, a second plate portion 132, and a third plate portion 133 that are bent sequentially, with the bending direction between the first plate portion 131 and the second plate portion 132 opposite to the bending direction between the second plate portion 132 and the third plate portion 133. Exemplarily, the fastener 130 can be stepped, i.e., the first plate portion 131 and the third plate portion 133 are parallel to each other. In this embodiment, the first plate portion 131 can be fixed to the upper cover 120 by welding or bolting, and the fire extinguishing plate 310 is sandwiched between the upper cover 120 and the third plate portion 133. It is understandable that the fastener 130 can be fixed to the top cover 120 first, and then the fire extinguishing plate 310 can be inserted between the top cover 120 and the third plate 133 by the deformation of the fastener 130 itself; or the fire extinguishing plate 310 can be attached to the top cover 120 first, and then the fastener 130 can be installed.
[0055] For example, taking a rectangular parallelepiped shape as an example, the upper cover 120 is provided with at least one fastener 130 on both sides along the width direction of the housing 100, for example, two fasteners. In this embodiment, when the first plate portion 131 is fixed to the upper cover 120 by welding, providing the fasteners 130 on both sides of the upper cover 120 along the width direction of the housing 100 helps to reduce the deformation of the fasteners 130 caused by the installation of the fire extinguishing plate 310, and facilitates the installation of the fire extinguishing plate 310.
[0056] In one feasible implementation, the top cover 120 has a groove 121 on the side facing the bottom shell 110, and at least part of the fire extinguishing components 300 are disposed in the groove 121, such as the fire extinguishing plate 310 and the sprinkler head 320, which can give the bottom shell 110 more space to accommodate the battery module 200.
[0057] In this embodiment, reference is made to Figure 2 and Figure 4 As shown, the bottom shell 110 is provided with a first perimeter 114, the top cover 120 is provided with a second perimeter 122, and the battery pack also includes a sealing ring (not shown). The sealing ring is sandwiched between the first perimeter 114 and the second perimeter 122, which helps to improve the airtightness of the cavity, improve the triggering reliability of the pressure valve, and improve the safety performance of the battery pack.
[0058] For example, the first perimeter 114 is located at the end of the perimeter 112 away from the bottom plate 111.
[0059] For example, both the first perimeter 114 and the second perimeter 122 can be bonded to the sealing ring, which helps to improve the airtightness of the cavity.
[0060] In one feasible embodiment, the battery pack further includes screws (not shown) to fasten the first perimeter 114 and the second perimeter 122 together, thereby stably pressing the sealing ring between the first perimeter 114 and the second perimeter 122, which helps to improve the airtightness of the receiving cavity. Exemplarily, the first perimeter 114 and the second perimeter 122 can be fastened together by multiple screws.
[0061] In other embodiments, the opening and closing of the spray head 320 can also be achieved in other ways, such as replacing the pressure valve with a solenoid valve. When the temperature inside the housing 100 reaches a threshold temperature, the solenoid valve is controlled to open the spray head 320.
[0062] 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 various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments 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 battery pack, characterized in that, include: Casing (100); A battery module (200) is disposed within the housing (100); A fire extinguishing assembly (300) is disposed within the housing (100) and located above the battery module (200). The fire extinguishing assembly (300) includes a fire extinguishing plate (310), a spray head (320), and a pressure valve. The fire extinguishing plate (310) has a cavity that can hold fire extinguishing agent. The spray head (320) is disposed on the side of the fire extinguishing plate (310) facing the battery module (200) and communicates with the cavity. The pressure valve is disposed within the spray head (320). When the air pressure inside the housing (100) reaches a threshold, it can trigger the pressure valve to open the spray head (320).
2. The battery pack according to claim 1, characterized in that, The housing (100) includes a bottom shell (110) and an upper cover (120) covering the bottom shell (110). A receiving cavity is formed between the upper cover (120) and the bottom shell (110). The battery module (200) and the fire extinguishing component (300) are both disposed in the receiving cavity.
3. The battery pack according to claim 2, characterized in that, The bottom shell (110) includes a bottom plate (111) and a surrounding plate (112) connected to the bottom plate (111). The bottom plate (111) is provided with a cooling channel and two connectors (113) communicating with the cooling channel. The top cover (120) is placed on the surrounding plate (112), and the receiving cavity is formed between the top cover (120), the surrounding plate (112) and the bottom plate (111).
4. The battery pack according to claim 2, characterized in that, The bottom shell (110) is provided with a first perimeter (114), the top cover (120) is provided with a second perimeter (122), and the battery pack also includes a sealing ring, which is sandwiched between the first perimeter (114) and the second perimeter (122).
5. The battery pack according to claim 4, characterized in that, The battery pack also includes a screw connector, through which the first perimeter (114) and the second perimeter (122) are fastened together.
6. The battery pack according to claim 2, characterized in that, The battery module (200) is disposed on the bottom shell (110), and the fire extinguishing plate (310) is disposed on the top cover (120).
7. The battery pack according to claim 6, characterized in that, The bottom shell (110) includes a bottom plate (111) and a surrounding plate (112) connected to the bottom plate (111). The bottom plate (111) is provided with a cooling channel and two connectors (113) communicating with the cooling channel. The top cover (120) is placed on the surrounding plate (112), and the receiving cavity is formed between the top cover (120), the surrounding plate (112) and the bottom plate (111). The battery module (200) is fixed on the bottom plate (111).
8. The battery pack according to claim 7, characterized in that, Thermally conductive adhesive is provided between the battery module (200) and the base plate (111).
9. The battery pack according to claim 6, characterized in that, The upper cover (120) is provided with a plurality of fixing members (130) spaced apart, and the fire extinguishing plate (310) is sandwiched between the upper cover (120) and the fixing members (130).
10. The battery pack according to any one of claims 1-9, characterized in that, The fire extinguishing assembly (300) includes a plurality of the spray heads (320); and / or, the spray heads (320) have a plurality of spray holes (321).