Battery device and electric appliance

Abstract

A battery device and an electric appliance, the battery device comprising a battery cluster and a pipeline assembly, the battery cluster comprising a plurality of battery packs, each battery pack comprising a housing, an explosion-proof valve and a plurality of batteries, the housing having a receiving space, the plurality of batteries being received in the receiving space, the explosion-proof valve being arranged on the housing; the pipeline assembly being connected with the plurality of housings, the plurality of receiving spaces being communicated through the pipeline assembly. When one of the battery packs is in thermal runaway and generates a large amount of gas, the gas can be guided into other battery packs in the battery cluster through the pipeline assembly and discharged through the explosion-proof valves of the plurality of battery packs, so that the insufficient discharge of the battery pack in thermal runaway does not cause the collapse of the housing structure, the change of the electrical clearance and the rupture of the housing, the strong electric part of the battery pack is not on fire and the entire battery cluster is not scrapped, the number of scrapped battery packs in the battery cluster can be effectively reduced and the loss can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a battery device and an electrical appliance. Background Technology

[0002] The battery cluster consists of multiple battery packs, each containing multiple batteries. In the event of thermal runaway, the battery packs release gas into their internal space. When the gas pressure reaches a certain level, the gas is released to the outside through the explosion-proof valve of the battery pack.

[0003] When a large number of batteries in a battery pack experience thermal runaway simultaneously, the venting capacity of the battery pack's explosion-proof valve may be insufficient, leading to excessive air pressure inside the battery pack. This can easily cause the battery pack's casing structure to collapse, resulting in changes in electrical clearances and casing rupture. Consequently, the high-voltage components of the battery cluster may catch fire, rendering the entire battery cluster unusable. Utility Model Content

[0004] The purpose of this invention is to provide a battery device and electrical equipment that solves the problem of shell structure collapse caused by insufficient exhaust volume of the battery pack.

[0005] To achieve the objectives of this utility model, the following technical solution is provided:

[0006] In a first aspect, this utility model provides a battery device, comprising:

[0007] A battery cluster includes multiple battery packs, each battery pack including a housing, an explosion-proof valve and multiple batteries, the housing having a receiving space in which the multiple batteries are received, and the explosion-proof valve being disposed in the housing;

[0008] A piping assembly is connected to a plurality of said housings, and the plurality of said containment spaces are connected through the piping assembly.

[0009] In one embodiment, the piping assembly includes a main pipe and a plurality of branch pipes, all of which are connected to the main pipe and are connected one-to-one to a plurality of housings.

[0010] In one embodiment, the piping assembly includes a main pipe, a plurality of first branch pipes, and a plurality of second branch pipes. The plurality of first branch pipes are all connected to the main pipe, and the plurality of second branch pipes are connected to the plurality of housings in a one-to-one correspondence. Each first branch pipe is connected to at least two second branch pipes.

[0011] In one embodiment, the piping assembly includes multiple connecting pipes, and the multiple housings are connected in series through the multiple connecting pipes. The connecting pipes connect adjacent two housings, and the connecting pipes connect the first housing and the last housing.

[0012] In one embodiment, the piping assembly includes a plurality of connecting pipes, with at least two of the connecting pipes connected to any of the housings, so that each battery pack has at least two venting paths through the piping assembly.

[0013] In one embodiment, the piping assembly is provided with a plurality of pressure relief valves, each of which corresponds to a plurality of battery packs. The pressure relief pressure of the pressure relief valve is greater than the pressure relief pressure of the explosion-proof valve and less than the maximum pressure that the housing can withstand.

[0014] In one embodiment, the piping assembly includes a piping structure, a connector, and a pipe fitting, wherein the pipe fitting is connected to the housing and communicates the receiving space with the outside, and the piping structure is connected to the pipe fitting via the connector.

[0015] In one embodiment, the connection between the piping assembly and the housing is located on the same surface as the explosion-proof valve.

[0016] In one embodiment, the battery device further includes a battery rack, on which all the battery packs of each battery cluster are disposed, and multiple battery packs are arranged at regular intervals on the battery rack.

[0017] In one embodiment, the battery device includes a plurality of battery clusters and a plurality of pipeline assemblies, with each battery cluster corresponding to one pipeline assembly.

[0018] Secondly, this utility model also provides an electrical device, including an electrical device and a battery device as described in any one of the various embodiments of the first aspect, wherein the battery device is used to supply power to the electrical device.

[0019] The battery device of this invention connects to the housings of multiple battery packs via a piping assembly. The housing spaces of the multiple battery packs are connected through the piping assembly. When one battery pack experiences thermal runaway and generates a large amount of gas, the gas can be introduced into other battery packs in the battery cluster through the piping assembly. The gas is then vented through the explosion-proof valves of the multiple battery packs, preventing insufficient venting from the thermally runaway battery pack from causing the housing structure to collapse, leading to changes in electrical clearances and housing rupture, which could cause the high-voltage parts of the battery pack to catch fire and ultimately render the entire battery cluster unusable. This effectively reduces the number of unusable battery packs in the battery cluster and minimizes losses. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A perspective view of a battery device according to one embodiment;

[0022] Figure 2 An exploded view of a battery device according to one embodiment;

[0023] Figure 3 A cross-sectional view of a battery device according to one embodiment;

[0024] Figure 4 yes Figure 3 A magnified view of a section at point A in the middle;

[0025] Figure 5 This is a schematic diagram of a battery device according to one embodiment;

[0026] Figure 6 This is a schematic diagram of a battery device according to another embodiment;

[0027] Figure 7 This is a schematic diagram of a battery device according to yet another embodiment.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100-Battery Unit;

[0030] 10-Battery pack, 11-Housing housing, 111-Accommodation space, 12-Explosion-proof valve, 13-Positive terminal, 14-Negative terminal, 15-Communication terminal;

[0031] 20-Pipeline assembly, 21-Pipeline structure, 22-Connector, 23-Pipe fitting, 24-Pressure relief valve, 25-Main pipe, 26-Branch pipe, 261-First branch pipe, 262-Second branch pipe, 27-Connecting pipe;

[0032] 30-Battery holder. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or it can be in a middle component. When a component is said to be "connected" to another component, it can be directly connected to the other component or it may be in a middle component.

[0035] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this invention includes any and all combinations of one or more of the associated listed items.

[0036] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0037] Please refer to Figure 1 This utility model provides a battery device 100, including a battery cluster and a pipeline assembly 20. The battery cluster includes multiple battery packs 10, and the pipeline assembly 20 is connected to all of the multiple battery packs 10.

[0038] Each battery pack 10 includes a housing 11, an explosion-proof valve 12, and multiple batteries (not shown). Reference Figure 3 and Figure 4 The housing 11 has a receiving space 111 in which multiple batteries are received, and an explosion-proof valve 12 is disposed on the housing 11. The piping assembly 20 is connected to the multiple housings 11, and the multiple receiving spaces 111 are connected through the piping assembly 20.

[0039] The housing 11 can be roughly rectangular in shape and can be formed by splicing multiple plates, with at least some plates being a one-piece structure. The receiving space 111 is the space enclosed by the housing 11, and multiple batteries can be arranged regularly in the receiving space 111, for example, in an array, and the number of batteries is not limited. The batteries can be batteries with casings or pouch batteries. When they are batteries with casings, the outer casing of the battery can also be equipped with a vent valve. The explosion-proof valve 12 can be installed on any plate of the housing 11, for example, it can be installed on a plate at one end of the length direction of the housing 11.

[0040] The explosion relief valve of the battery can have a similar structure to the explosion-proof valve 12 of the battery pack 10. For example, it can use a metal sheet with a weak area. When the gas pressure reaches the threshold, it will break through the weak area, causing the metal sheet to crack and thus allowing the gas to be released. Of course, other types of structures can also be used without limitation.

[0041] When a battery in the battery pack 10 experiences thermal runaway, the gas generated by the battery is released into the containment space 111 within the casing 11. When the pressure relief threshold of the explosion-proof valve 12 is reached, the explosion-proof valve 12 activates to release pressure. When multiple batteries experience thermal runaway simultaneously, the gas release volume from multiple batteries is very large. If the pressure relief capacity of the explosion-proof valve 12 is insufficient, it may cause the structure of the casing 11 to collapse, resulting in changes in electrical clearances and rupture of the casing 11. This could lead to a fire in the high-voltage section of the battery pack 10, ultimately rendering the entire battery cluster unusable.

[0042] To address this issue, a piping assembly 20 is connected to multiple battery packs 10, and the housing spaces 111 of the multiple battery packs 10 are interconnected through the piping assembly 20. When the venting volume of one battery pack 10 is too large, and the explosion-proof valve 12 of that battery pack 10 cannot vent in time, the gas from that battery pack 10 can be introduced into other battery packs 10 through the piping assembly 20, and vented through the explosion-proof valves 12 of those other battery packs 10. The function of the piping assembly 20 is to connect the housing spaces 111 of multiple battery packs 10, and when a sudden increase in gas in the housing space 111 causes insufficient venting by the explosion-proof valve 12 of that battery pack 10, to introduce the gas from that housing space 111 into the housing spaces 111 of other battery packs 10, and vent it through the explosion-proof valves 12 of those other battery packs 10. This effectively increases the number of venting explosion-proof valves 12, thereby increasing the venting volume and timely expelling the large amount of gas generated.

[0043] It should be understood that the battery pack 10 is the basic unit for charging and discharging. If a battery pack 10 is severely overcharged, it may cause all the batteries in the battery pack 10 to malfunction and thermally run away, generating a large amount of gas instantaneously. The venting capacity of the explosion-proof valve 12 of the battery pack 10 is severely insufficient. Therefore, the gas in the battery pack 10 can be introduced into other battery packs 10 in the same battery cluster through the pipeline assembly 20 and vented through the explosion-proof valve 12 of the other battery packs 10 to prevent the casing 11 of the battery pack 10 from expanding and deforming under the action of high-pressure gas, and causing structural collapse.

[0044] It should be understood that the multiple battery packs 10 in a battery cluster are typically electrically connected, forming an integrated electrical connection structure and subject to unified management. The multiple battery packs 10 in a battery cluster are usually arranged adjacent to each other. If a battery pack 10 experiences thermal runaway and vents through the explosion-proof valve 12, but the venting volume is severely insufficient, without proper gas extraction, the casing 11 of that battery pack 10 will collapse. This will cause the distance between that battery pack 10 and the other battery packs 10 in the battery cluster to narrow, or even compress, the other battery packs 10. If the collapsed battery pack 10 catches fire, it will also cause the strong points of the other battery packs 10 in the battery cluster to ignite. By installing a piping assembly 20 to guide the gas from the thermally runaway battery pack 10 to the other battery packs 10 and venting it through the explosion-proof valve 12 of the multiple battery packs 10 in the battery cluster, the venting volume can be increased, thus preventing the casing 11 of the thermally runaway battery pack 10 from collapsing.

[0045] It should be understood that if one battery pack 10 experiences thermal runaway and is left untreated, the other battery packs 10 in the same battery cluster will be compressed, potentially causing a fire in the high-voltage components of the cluster, rendering the entire cluster unusable. However, by using the piping assembly 20 to introduce the gas from the thermally runaway battery pack 10 into other non-thermally runaway battery packs 10, and simultaneously venting the gas through the explosion-proof valves 12 of multiple battery packs 10, venting can be achieved using the explosion-proof valves 12 of multiple battery packs 10. Furthermore, since the batteries within each battery pack 10 typically have thermal insulation measures, the introduced gas is unlikely to cause thermal runaway in the non-thermally runaway batteries, thus preventing the entire battery cluster from being rendered unusable due to the structural collapse of the thermally runaway battery pack 10. Even if some non-thermally runaway battery packs 10 experience thermal runaway due to the introduced gas, only those battery packs 10 that experienced thermal runaway and those whose thermal runaway was caused by the introduced gas will be rendered unusable; the entire battery pack 10 in the cluster will not be rendered unusable. Therefore, this method effectively reduces the number of unusable battery packs 10 in the battery cluster, minimizing losses.

[0046] The battery device 100 of this utility model embodiment is connected to the housing 11 of multiple battery packs 10 through a pipeline assembly 20. The housing space 111 of the multiple battery packs 10 is connected through the pipeline assembly 20. When one of the battery packs 10 thermally runs away and generates a large amount of gas, the gas can be introduced into other battery packs 10 in the battery cluster through the pipeline assembly 20, and the gas can be vented through the explosion-proof valves 12 of the multiple battery packs 10. This avoids the battery pack 10 from having insufficient venting volume due to thermal runaway, which could lead to the collapse of the housing 11 structure, change of electrical clearance and rupture of the housing 11, causing the high-voltage part of the battery pack 10 to catch fire and thus the entire battery cluster to be scrapped. This can effectively reduce the number of scrapped battery packs 10 in the battery cluster and reduce losses.

[0047] Please refer to Figure 1 and Figure 2The battery device 100 also includes a battery rack 30, on which all the battery packs 10 of each battery cluster are disposed, and multiple battery packs 10 are arranged at regular intervals on the battery rack 30.

[0048] The battery rack 30 can be a frame structure, and its side walls can be either open or closed, with no restrictions. The specific structure of the battery rack 30 is not limited, nor is the installation method of multiple batteries with the battery rack 30 restricted.

[0049] In a specific embodiment, such as Figure 1 and Figure 2 As shown, the battery rack 30 is generally rectangular in shape, and multiple battery packs 10 are sequentially installed in the battery rack 30 in the direction of gravity, with a certain gap between adjacent battery packs 10. Optionally, one side of the battery rack 30 has no sidewall, and the battery packs 10 can be installed into the battery rack 30 from the side without sidewall, which facilitates the assembly of the battery packs 10. A plate at one end of the battery pack 10 in the longitudinal direction is exposed at the sidewall-free position of the battery rack 30, and a piping assembly 20 can be connected to this plate, facilitating the connection of the piping assembly 20 and avoiding structural interference from the battery rack 30. It is understood that the piping assembly 20 can also be connected to other positions on the housing 11 of the battery pack 10, without limitation.

[0050] On the plate at one end of the battery pack 10 exposed from the side wall of the battery rack 30 along its length, there may also be a positive terminal 13, a negative terminal 14, a communication terminal 15, an explosion-proof valve 12, etc. The positive terminal 13 and the negative terminal 14 can be charged or discharged, the communication terminal 15 can be used for signal transmission, and the explosion-proof valve 12 can be used for venting.

[0051] By setting up the battery rack 30, multiple battery packs 10 can be installed to form a battery cluster, which facilitates centralized management and enables large-capacity charging and discharging.

[0052] Optionally, the connection between the piping assembly 20 and the housing 11 is located on the same surface as the explosion-proof valve 12.

[0053] In one specific embodiment, reference Figure 1 The connection point between the pipeline assembly 20 and the housing 11, and the explosion-proof valve 12 are both located on the plate exposed at one end of the length direction of the housing 11 where the battery rack 30 has no side wall.

[0054] This design simplifies the design of the housing 11 of the battery pack 10. Only an explosion-proof valve 12 needs to be installed on a single plate and connected to the piping assembly 20, thus avoiding an overly complex piping assembly 20.

[0055] Meanwhile, since the explosion-proof valve 12 is used for venting, an airflow path is designed inside the housing 11 near the explosion-proof valve 12 so that the gas inside the housing 11 can flow to the explosion-proof valve 12 for discharge. The connection position of the pipeline assembly 20 to the housing 11 is on the same plate as the explosion-proof valve 12, so that the pipeline assembly 20 is also near the airflow path inside the housing 11, which also allows the gas to be led out by the pipeline assembly 20, achieving rapid venting.

[0056] Furthermore, there is no need to modify the original internal design of the battery pack 10, as the original airflow path can be shared by the explosion-proof valve 12 and the piping assembly 20. In this embodiment, the connection point between the piping assembly 20 and the housing 11 is located close to the explosion-proof valve 12, but there is no need to limit the specific value of the distance between them; it can be set as needed.

[0057] Optional, see reference Figure 1 The battery device 100 includes multiple battery clusters and multiple pipeline assemblies 20, with each battery cluster corresponding to a pipeline assembly 20.

[0058] Battery device 100 may include multiple such Figure 1 The battery clusters shown are mounted one-to-one on multiple battery racks 30, arranged in a regular pattern. Of course, the multiple battery clusters can also be mounted on a single battery rack 30, or inside a container, or in any other feasible manner; there are no restrictions.

[0059] Each battery cluster is provided with a corresponding conduit assembly 20, which connects to the receiving space 111 within the housing 11 of the multiple battery packs 10 of that battery cluster. The conduit assemblies 20 provided for each battery cluster can be the same or different, without limitation. By including multiple battery clusters in the battery device 100, the capacity of the battery device 100 is increased, which can meet greater charging and discharging requirements. By providing a conduit assembly 20 for each battery cluster, the battery device 100 vents gas on a cluster-by-cluster basis, preventing interference between battery clusters and avoiding thermal runaway of one battery pack 10 from affecting other battery packs 10.

[0060] In one embodiment, reference Figures 2 to 4 The piping assembly 20 includes a piping structure 21, a connector 22, and a pipe fitting 23. The pipe fitting 23 is connected to the housing 11 and communicates with the receiving space 111 and the outside. The piping structure 21 is connected to the pipe fitting 23 through the connector 22.

[0061] The pipe connector 23 can be connected to the housing 11 by means of integral molding, welding, or other methods. The specific structure of the pipeline structure 21 is not limited; the pipeline structure 21 can be connected to the pipe connector 23 by mating, sleeve, or other methods. The connector 22 can be sleeved on the pipe connector 23 and the pipeline structure 21 to achieve connection and sealing between the pipe connector 23 and the pipeline structure 21. By setting the pipeline assembly 20 to a structure of pipeline structure 21, connector 22, and pipe connector 23, the pipe connector 23 can be connected to the battery pack 10 first, and then the pipe connector 23 can be connected to the pipeline structure 21 through the connector 22, facilitating the connection between the pipeline assembly 20 and the battery pack 10.

[0062] Optional, such as Figure 4 As shown, the inner diameter of the pipe joint 23 can be smaller than the inner diameter of the connection between the pipe structure 21 and the pipe joint 23. The structure with an increased inner diameter is formed from the pipe joint 23 to the pipe structure 21, which is conducive to the accelerated flow of gas from the pipe joint 23 to the pipe structure 21, and can speed up the exhaust speed of the thermally runaway battery pack 10.

[0063] In one embodiment, reference Figure 4 The pipeline assembly 20 is equipped with multiple pressure relief valves 24, each corresponding to a battery pack 10. The pressure relief pressure of the pressure relief valve 24 is greater than the pressure relief pressure of the explosion-proof valve 12 but less than the maximum pressure that the housing 11 can withstand.

[0064] If only a few batteries in the battery pack 10 experience thermal runaway, the explosion-proof valve 12 of that battery pack 10 can meet the venting requirements. In this case, venting through the piping assembly 20 is unnecessary to minimize the impact on other battery packs 10. If a large number of batteries experience thermal runaway, and the venting capacity exceeds the limit of the explosion-proof valve 12, the gas can be introduced into other battery packs 10 and vented together through the explosion-proof valves 12 of those other battery packs 10. Based on this, in this embodiment, a pressure relief valve 24 is provided in the pipeline assembly 20. When the exhaust volume of the explosion-proof valve 12 can meet the exhaust requirements, the pressure relief valve 24 is closed, and exhaust is only carried out through the explosion-proof valve 12 of the thermally runaway battery pack 10 itself. When the exhaust volume of the explosion-proof valve 12 cannot meet the exhaust requirements and the housing 11 is at risk of structural collapse, the pressure relief valve 24 is opened. The gas of the thermally runaway battery pack 10 is exhausted through its own explosion-proof valve 12, and the gas is introduced into other battery packs 10 through the pipeline assembly 20, and is simultaneously exhausted through the explosion-proof valves 12 of the other battery packs 10.

[0065] The specific structure of the pressure relief valve 24 is not limited. It can refer to the metal plate with a weak area of ​​the explosion-proof valve 12 mentioned above, or it can be a diaphragm structure, etc. When the gas pressure in the thermally runaway battery pack 10 is greater than the pressure relief pressure of the explosion-proof valve 12 but less than the maximum pressure that the housing 11 can withstand, the pressure relief valve 24 will rupture, allowing gas to flow through the pressure relief valve 24.

[0066] The pressure relief valve 24 can be installed in the aforementioned pipe joint 23, connector 22 or pipeline structure 21, as long as one pressure relief valve 24 controls whether one battery pack 10 vents through the pipeline assembly 20, without any restrictions.

[0067] The following describes some specific structural embodiments of the piping assembly 20.

[0068] In one specific embodiment, please refer to Figures 1 to 3 The piping assembly 20 includes a main pipe 25 and multiple branch pipes 26. The multiple branch pipes 26 are all connected to the main pipe 25, and the multiple branch pipes 26 are connected one-to-one to the housings 11 of multiple battery packs 10.

[0069] In the embodiment where the aforementioned piping assembly 20 includes a piping structure 21, a pipe fitting 23, and a connector 22, the portion of the pipe fitting 23 connected to the pipe fitting 23, the connector 22, and the piping structure 21 is a branch pipe 26, and the remaining portion of the piping structure 21, excluding the portion connected to the pipe fitting 23, is a main pipe 25. Optionally, the inner diameter of the main pipe 25 is larger than the inner diameter of the branch pipe 26 to facilitate faster gas flow from the branch pipe 26 to the main pipe 25. When one of the battery packs 10 experiences thermal runaway, the gas flows through the branch pipe 26 connected to the thermally runaway battery pack 10 to the main pipe 25, and then flows through the main pipe 25 to the other battery packs 10. In this embodiment, the piping assembly 20 is equivalent to multiple battery packs 10 connected in parallel via the piping assembly 20.

[0070] In one specific embodiment, reference Figure 5 The piping assembly 20 includes a main pipe 25, a plurality of first branch pipes 261 and a plurality of second branch pipes 262. The plurality of first branch pipes 261 are all connected to the main pipe 25, and the plurality of second branch pipes 262 are connected one-to-one to the housings 11 of the plurality of battery packs 10. Each first branch pipe 261 is connected to at least two second branch pipes 262.

[0071] The first branch pipe 261 can be connected to two second branch pipes 262 connected to two adjacent battery packs 10. When one of the battery packs 10 experiences thermal runaway, gas can flow through the second branch pipe 262 connected to the thermally runaway battery pack 10 to the first branch pipe 261. A portion of the gas flows through the second branch pipe 262 connected to the adjacent thermally runaway battery pack 10 to the adjacent battery pack 10 for venting, and the remaining portion flows through the main pipe 25 to the other battery packs 10 for venting. The piping assembly 20 in this embodiment... Figures 1 to 4The embodiments shown are basically the same, except that the multiple battery packs 10 in this embodiment are equivalent to being connected in parallel through multiple stages of pipeline assembly 20, so that the thermal runaway battery pack 10 can flow to the adjacent battery pack 10 through a shorter path (i.e., thermal runaway battery pack 10 - second branch pipe 262 - first branch pipe 261 - second branch pipe 262 - adjacent battery pack 10). At the same time, the explosion-proof valves 12 of other battery packs 10 can continue to be used for venting (i.e., thermal runaway battery pack 10 - second branch pipe 262 - first branch pipe 261 - main pipe 25 - first branch pipe 261 - second branch pipe 262 - other battery packs 10), which can speed up the venting speed.

[0072] In one specific embodiment, reference Figure 6 The piping assembly 20 includes multiple connecting pipes 27, and multiple housings 11 are connected in series through multiple connecting pipes 27. A connecting pipe 27 connects two adjacent housings 11, and a connecting pipe 27 connects the first housing 11 and the last housing 11.

[0073] Multiple battery packs 10 are connected in series through multiple connecting pipes 27. A battery pack 10 that has experienced thermal runaway can vent gas to two adjacent battery packs 10 through the connecting pipes 27, which can also accelerate the venting speed.

[0074] In one specific embodiment, reference Figure 6 and Figure 7 The piping assembly 20 includes a plurality of connecting pipes 27, and each housing 11 is connected to at least two connecting pipes 27 so that each battery pack 10 has at least two exhaust paths through the piping assembly 20.

[0075] This embodiment does not limit the multiple battery packs 10 to being connected in parallel or in series through the piping assembly 20, such as Figure 6 The illustrated embodiment shows an example of multiple battery packs 10 connected in series via multiple connecting tubes 27, while Figure 7 The illustrated embodiment shows a configuration in which multiple battery packs 10 are connected in parallel via a conduit assembly 20 (connecting pipe 27). Since each battery pack 10 has at least two venting paths via the conduit assembly 20, the venting speed is accelerated. It should be understood that, in addition to Figure 6 , Figure 7 In addition to the embodiments shown, any other feasible structures can be set, and there are no restrictions.

[0076] Please refer to Figures 1 to 7 This utility model embodiment also provides an electrical device (not shown), including an electrical device (not shown) and a battery device 100 as described in any of the foregoing embodiments, wherein the battery device 100 is used to supply power to the electrical device.

[0077] The electrical device can be an industrial electrical load, a commercial electrical load, a household electrical load, etc., and there are no specific limitations. By using the battery device 100 of this embodiment to power the electrical device, the battery device 100 connects multiple battery packs 10 through a pipeline assembly 20. When one battery pack 10 experiences thermal runaway and generates a large amount of gas, the gas can be introduced into other battery packs 10 in the battery cluster through the pipeline assembly 20, and vented through the explosion-proof valves 12 of the multiple battery packs 10. This prevents insufficient venting of the thermally runaway battery pack 10 from causing the casing 11 structure to collapse, leading to changes in electrical clearances and rupture of the casing 11, causing the high-voltage parts of the battery pack 10 to catch fire, and ultimately rendering the entire battery cluster unusable. This effectively reduces the number of unusable battery packs 10 in the battery cluster, reducing losses.

[0078] In the description of the embodiments of this utility model, it should be noted that the orientation or positional relationship of the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other indicators are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0079] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the present utility model.

Claims

1. A battery device (100), characterized in that, include: A battery cluster includes multiple battery packs (10), each of the battery packs (10) including a housing (11), an explosion-proof valve (12) and multiple batteries. The housing (11) has a receiving space (111) in which the multiple batteries are received. The explosion-proof valve (12) is disposed on the housing (11). Piping assembly (20) is connected to a plurality of said housings (11), and a plurality of said receiving spaces (111) are connected through said piping assembly (20).

2. The battery device (100) according to claim 1, characterized in that, The piping assembly (20) includes a main pipe (25) and a plurality of branch pipes (26), all of which are connected to the main pipe (25) and are connected one-to-one to the plurality of housings (11).

3. The battery device (100) according to claim 1, characterized in that, The piping assembly (20) includes a main pipe (25), a plurality of first branch pipes (261) and a plurality of second branch pipes (262). The plurality of first branch pipes (261) are all connected to the main pipe (25), and the plurality of second branch pipes (262) are connected to the plurality of housings (11) in a one-to-one correspondence. Each first branch pipe (261) is connected to at least two second branch pipes (262).

4. The battery device (100) according to claim 1, characterized in that, The piping assembly (20) includes a plurality of connecting pipes (27), and a plurality of housings (11) are connected in series through the plurality of connecting pipes (27). The connecting pipes (27) are connected between two adjacent housings (11), and the connecting pipes (27) are connected between the first housing (11) and the last housing (11).

5. The battery device (100) according to claim 1, characterized in that, The piping assembly (20) includes a plurality of connecting pipes (27), and each of the housings (11) is connected to at least two of the connecting pipes (27) so that each of the battery packs (10) has at least two exhaust paths through the piping assembly (20).

6. The battery device (100) according to any one of claims 1 to 5, characterized in that, The pipeline assembly (20) is provided with a plurality of pressure relief valves (24), each of the plurality of pressure relief valves (24) corresponding to a plurality of battery packs (10). The pressure relief pressure of the pressure relief valve (24) is greater than the pressure relief pressure of the explosion-proof valve (12) and less than the maximum pressure that the housing (11) can withstand.

7. The battery device (100) according to any one of claims 1 to 5, characterized in that, The piping assembly (20) includes a piping structure (21), a connector (22), and a pipe fitting (23). The pipe fitting (23) is connected to the housing (11) and communicates with the receiving space (111) and the outside. The piping structure (21) is connected to the pipe fitting (23) through the connector (22).

8. The battery device (100) according to any one of claims 1 to 5, characterized in that, The connection between the pipeline assembly (20) and the housing (11) is on the same surface as the explosion-proof valve (12).

9. The battery device (100) according to any one of claims 1 to 5, characterized in that, The battery device (100) further includes a battery rack (30), on which all the battery packs (10) of each battery cluster are disposed, and multiple battery packs (10) are arranged at regular intervals on the battery rack (30).

10. The battery device (100) according to any one of claims 1 to 5, characterized in that, The battery device (100) includes a plurality of battery clusters and a plurality of pipeline assemblies (20), with each battery cluster corresponding to one pipeline assembly (20).

11. An electrical appliance, characterized in that, It includes an electrical device and a battery device (100) as described in any one of claims 1 to 10, the battery device (100) being used to supply power to the electrical device.

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