A venting connection pipe, a battery member, and a battery cluster

Abstract

The utility model provides a kind of venting connection pipe, battery component and battery cluster, mainly solve the safety hidden trouble problem caused by the heat runaway flue gas of existing battery component cannot be discharged in time accurately.The venting connection pipe includes tee pipe and venting unit;The first interface of tee pipe is used to connect with the venting port of battery component, and the second interface and the third interface are respectively used to connect with the insulating flexible tube constituting venting manifold;Venting unit includes venting membrane, and the venting membrane is fixedly arranged in the first interface of tee pipe.The venting connection pipe can realize the venting function of battery component by only one tee pipe, and also can realize the convergence function of heat runaway flue gas, so that the battery component structure is simple, the integration is high, and the manufacturing cost is lower.

Description

Technical Field

[0001] This utility model belongs to the field of batteries, specifically relating to an explosion-proof connecting pipe, battery components, and battery clusters. Background Technology

[0002] Energy storage containers, as a new type of energy storage equipment, have advantages such as portability, flexibility, and high efficiency, and are widely used in power systems, transportation, aerospace, and other fields. Existing energy storage containers on the market include a container body and multiple battery clusters located inside. Each battery cluster includes multiple battery components (also known as battery packs or battery modules). Each battery component is composed of an outer shell and multiple individual batteries connected in parallel, series, or a series-parallel combination within the outer shell.

[0003] Because battery components are highly concentrated in energy storage containers, individual cells may overcharge, over-discharge, or overheat, which can easily lead to thermal runaway. If the thermal runaway fumes cannot be discharged in a timely and accurate manner, the thermal runaway will continue to occur and spread. In severe cases, it may cause the battery components or even the battery cluster to burn or explode, thus posing a safety hazard. Summary of the Invention

[0004] This utility model provides an explosion relief connecting pipe, a battery component, and a battery cluster, which mainly solves the safety hazard caused by the inability to timely and accurately discharge thermal runaway fumes from existing battery components.

[0005] To solve the above problems, the technical solution provided by this utility model is as follows:

[0006] An explosion-proof connecting pipe includes a tee pipe and an explosion-proof unit; the first port of the tee pipe is used to connect to the explosion-proof port of a battery component, and the second and third ports are respectively used to connect to the insulating flexible pipe constituting the explosion-proof manifold, wherein the first port of the tee pipe is perpendicular to the second and third ports; the explosion-proof unit includes an explosion-proof membrane, which is fixedly disposed in the first port of the tee pipe.

[0007] Furthermore, the outer peripheral walls of the second and third interfaces of the three-way pipe are provided with multiple annular protrusions, and the insulating flexible tube is fitted onto the annular protrusions.

[0008] Furthermore, the first interface of the three-way pipe is provided with an annular boss, and the explosion relief membrane is embedded in the first interface and welded to the annular boss.

[0009] Furthermore, the explosion venting membrane has a groove in the middle region to form a weak explosion venting zone.

[0010] This utility model also provides a battery component, which includes a housing and a plurality of individual batteries disposed inside the housing; the housing is provided with an explosion vent, and an explosion vent connecting pipe is fixedly connected to the explosion vent.

[0011] Furthermore, the first interface of the three-way pipe is fixedly connected to the explosion vent of the outer shell by welding.

[0012] Furthermore, a first clearance hole is provided on the top plate of the battery component housing corresponding to the polarity terminal of each individual battery; the polarity terminal of each individual battery extends out of the first clearance hole, and the area of ​​the top plate of the housing corresponding to the first clearance hole is fixedly sealed with the housing of the individual battery; a shared chamber is provided inside the housing, and the inner cavity of the shared chamber is connected to the inner cavity of all individual batteries.

[0013] This utility model also provides a battery cluster, which includes multiple battery components arranged in sequence; the explosion relief connection pipes of adjacent battery components are connected by an insulating flexible pipe to form an explosion relief manifold.

[0014] Furthermore, after the insulating flexible tube is fitted onto the second and third interfaces of the tee pipe, it is secured with clamps.

[0015] Furthermore, a heat-insulating sealing gasket is provided between the second and third interfaces of the insulated flexible tube and the tee tube.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. The explosion relief connecting pipe of this utility model is fixedly connected to the battery component. The explosion relief connecting pipes of adjacent battery components form an explosion relief manifold through an insulating flexible pipe. When a single cell in any battery component in the battery cluster experiences thermal runaway, the thermal runaway fumes can be discharged through the explosion relief manifold, reducing the risk of thermal runaway propagation, combustion or explosion of battery components or even battery cluster.

[0018] The explosion venting connection pipe in this invention can achieve the explosion venting function of the battery component with only one pipe fitting, and can also realize the function of thermal runaway flue gas convergence. After it is installed on the battery component, the structure of the battery component is simplified, the integration is high, and the manufacturing cost is low.

[0019] 2. In this utility model of an explosion-proof connecting pipe, the outer peripheral walls of the second and third interfaces of the tee pipe are provided with multiple annular protrusions. The insulating flexible pipe is fitted onto the annular protrusions of the second and third interfaces of the tee pipe, making the connection of the insulating flexible pipe more reliable. At the same time, the annular protrusions increase the contact area and friction between the tee pipe and the insulating flexible pipe, improving the reliability of the connection and preventing the insulating flexible pipe from falling off during use. In addition, the structural design of the annular protrusions ensures the sealing of the connection, effectively preventing liquid or gas leakage.

[0020] 3. In the explosion relief connecting pipe of this utility model, the first interface of the tee pipe is provided with an annular boss, the explosion relief membrane is embedded in the first interface and welded to the annular boss. The installation method of this explosion relief membrane is relatively simple. It is only necessary to process the annular boss in the tee pipe and weld the explosion relief membrane. At the same time, the welding connection method improves the reliability and sealing of the explosion relief membrane after installation compared with other connection methods.

[0021] 4. In the explosion relief connecting pipe of this utility model, the middle area of ​​the explosion relief membrane is provided with a groove to form a weak explosion relief area, so as to ensure that the explosion relief membrane opens in time when the pressure inside the battery component shell is large, thereby improving the safety of the battery component during use.

[0022] 5. In the battery component of this utility model, the first interface of the three-way pipe is fixedly connected to the explosion vent of the outer shell by welding. This connection method can not only achieve reliable installation of the explosion vent connection pipe, but also improve the sealing performance of the connection between the explosion vent connection pipe and the explosion vent of the battery component.

[0023] 6. In the battery cluster of this utility model, the explosion venting connection pipes of adjacent battery components are connected by an insulating flexible pipe to form an explosion venting manifold. The explosion venting manifold connects the explosion venting connection pipes of all battery components in the battery cluster. When a single cell in any battery component in the battery cluster experiences thermal runaway, its thermal runaway fumes can be discharged through the explosion venting manifold, reducing the risk of thermal runaway propagation, combustion or explosion of battery components or even the battery cluster.

[0024] By using an insulated flexible tube to connect adjacent battery components to form a venting manifold, the deformation of the insulated flexible tube can compensate for installation deviations in the venting connection tubes of each battery component. This eliminates the need to readjust the positions of the battery components, reducing installation difficulty and minimizing installation requirements for each component. Furthermore, the insulated flexible tube also provides insulation between adjacent battery components, ensuring their safety during use. Additionally, the venting manifold formed by this connection tube and the insulated flexible tube is relatively easy to install on-site.

[0025] 7. In this utility model of battery cluster, the insulating flexible tube is fitted onto the second and third interfaces of the tee pipe, and a clamp is used to further achieve a simple and quick connection. The clamp ensures a tight connection between the insulating flexible tube and the tee pipe, preventing loosening and improving the reliability of the connection between the insulating flexible tube and the tee pipe.

[0026] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the explosion venting connection pipe in Example 1. Figure 1;

[0028] Figure 2 This is an exploded view of the explosion-proof connecting pipe in Example 1;

[0029] Figure 3 This is a schematic diagram of the explosion venting connection pipe in Example 1. Figure 2 ;

[0030] Figure 4 This is a cross-sectional view of the explosion relief connection pipe in Example 1;

[0031] Figure 5 This is a schematic diagram of the battery component in Example 2;

[0032] Figure 6 This is an exploded view of the battery component in Example 2;

[0033] Figure 7 This is a cross-sectional view of the battery component in Example 2;

[0034] Figure 8 This is a schematic diagram of the structure of a single cell in Example 2;

[0035] Figure 9 This is a schematic diagram of the heat transfer tube in Example 2;

[0036] Figure 10 This is a schematic diagram showing the interaction between the heat transfer tube and the polarity terminals of each individual battery cell in Example 2.

[0037] Figure 11 This is a schematic diagram of the battery cluster structure in Example 3;

[0038] Figure 12 This is a schematic diagram of the explosion of the battery cluster in Example 3;

[0039] Figure 13 This is a schematic diagram of the explosion-proof manifold in Example 3.

[0040] Reference numerals: 1-Battery component, 2-Explosion relief connection pipe, 3-Insulating flexible pipe, 4-Explosion relief manifold, 5-Clamp, 11-Shell, 12-Single battery, 13-Polar terminal, 14-First clearance hole, 15-Heat transfer pipe, 16-Insulating sealant layer, 131-Through groove, 132-Through hole, 151-Second clearance hole, 111-Explosion relief port, 112-Gas sharing chamber, 113-Electrolyte sharing chamber, 21-T-connector, 211-First interface, 212-Second interface, 213-Third interface, 214-Annular protrusion, 215-Annular boss, 22-Explosion relief membrane, 221-Weak explosion relief area. Detailed Implementation

[0041] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0042] The phrase "other embodiments" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments. In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0043] In this specification, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate component, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] Furthermore, in the description of this utility model, it should be noted that the terms "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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.

[0045] To prevent the spread of thermal runaway fumes from individual battery cells within a container into the entire container, potentially causing safety issues, CN221727355U discloses a battery pack, battery cluster, and battery cluster assembly. In this battery pack, a venting pipe assembly communicating with the inner cavity of the outer shell of each battery cell is provided on the outer shell. This venting pipe assembly includes a first venting component and a second venting component. The first venting component includes a first hollow tube connected to the outer shell, containing a venting membrane. The second venting component is a tee pipe, with its first port sealed to the first venting component, and its second and third ports respectively used to connect to an insulating flexible tube constituting a venting manifold via threaded union nuts or union connectors. The venting manifold discharges the thermal runaway fumes from each battery cell. However, this venting pipe assembly is formed by connecting multiple tubes, including the first and second venting components, resulting in a complex structure and connections. Furthermore, the multiple connections create multiple leakage points, increasing the risk of leakage.

[0046] Based on this, the present invention provides a venting manifold that consists of only a T-joint. The venting diaphragm is directly installed inside this T-joint. After the T-joint is fixed to the housing of the battery component, the T-joint can both vent the battery component and facilitate the collection of thermal runaway gases. Because the venting manifold consists of only a single T-joint, it has high integration, a simple structure, and low manufacturing cost. Furthermore, installation is convenient, requiring only connection to the battery component and the insulating flexible tube. In addition, the fewer connection joints between the venting manifold and the insulating flexible tube reduce the risk of leakage.

[0047] The aforementioned explosion-proof connecting pipe is applicable to various battery components with different structures, such as those disclosed in Chinese patents CN117477186A, CN117477063A, and CN115275453A. These battery components all include multiple individual cells and a shared chamber communicating with the inner cavity of each individual cell (the shared chamber mentioned here refers to the first hollow component or second hollow component described in CN117477186A, the hollow component described in CN117477063A, and the electrolyte shared channel described in CN115275453A). In this invention, one end of the shared chamber is used as the explosion-proof port of the battery component, and it is connected to the explosion-proof connecting pipe.

[0048] The aforementioned explosion venting connection pipe can also be applied to the battery components disclosed in Chinese Patent CN220324596U. Such battery components include a shell and multiple individual cells arranged inside the shell; the inner cavity of each individual cell is connected to the inner cavity of the shell; the shell is provided with an explosion vent, and this utility model seals the explosion venting connection pipe to the explosion vent.

[0049] The aforementioned explosion venting connection pipe can also be applied to individual batteries, connecting to the explosion vent of the individual battery; for example, it can be used as the explosion venting pipe in the battery disclosed in Chinese Patent CN113725552A, connecting the explosion vent of each individual battery to the explosion venting manifold.

[0050] The aforementioned explosion venting connection pipe can also be applied to existing battery modules. The battery module includes a housing and multiple individual batteries disposed inside the housing. The housing is provided with an explosion vent, and an explosion venting connection pipe is fixedly connected to the explosion vent. After a single battery experiences thermal runaway, the thermal runaway flue gas first opens the explosion venting membrane on the single battery. Subsequently, the thermal runaway flue gas diffuses inside the housing. When the pressure of the thermal runaway flue gas inside the housing reaches a certain value, the thermal runaway flue gas inside the housing opens the explosion venting membrane in the explosion venting connection pipe, thereby expelling the thermal runaway flue gas from the housing.

[0051] The following describes the structure of the explosion venting connection pipe in detail, taking the battery component, including the outer casing and multiple individual batteries arranged inside the casing, as an example.

[0052] Example 1

[0053] like Figures 1 to 4 As shown, this embodiment provides an explosion-proof connecting pipe 2, which includes a three-way pipe 21 and an explosion-proof unit. The first interface 211 of the three-way pipe 21 is used to connect to the explosion-proof port 111 of the battery component 1, and the second interface 212 and the third interface 213 are respectively used to connect to the insulating flexible pipe 3 constituting the explosion-proof manifold 4. The first interface of the three-way pipe is perpendicular to the second and third interfaces. The explosion-proof unit includes an explosion-proof membrane 22, which is fixedly installed in the first interface 211 of the three-way pipe 21. The explosion-proof connecting pipe 2 in this embodiment only includes one pipe fitting, the three-way pipe 21, which has high integration, simple structure, and relatively simple installation. After connection, there are fewer connection joints and better sealing. By fixing the explosion-proof connecting pipe 2 to the outer shell 11 of the battery component 1, it can not only realize the explosion-proof function of the battery component 1, but also connect with the insulating flexible pipe 3 to form the explosion-proof manifold 4, realizing the directional discharge function of thermal runaway flue gas.

[0054] In this embodiment, the explosion venting connection pipe 2 is a three-way pipe 21. The three-way pipe 21 is a rigid metal three-way pipe used for a sealed connection with the explosion vent 111 of the battery component 1. It can typically be made of the same aluminum metal as the outer shell 11 of the battery component 1, or it can be made of other metals, such as stainless steel. At the same time, the three-way pipe 21 is a high-temperature resistant pipe, that is, in the event of thermal runaway, the explosion venting connection pipe 2 must not deform, ensuring the reliability and sealing of the connection between the explosion venting connection pipe 2 and the outer shell 11 of the battery component 1, so as to avoid deformation and leakage caused by high temperature.

[0055] The aforementioned explosion-proof connecting pipe 2 and the explosion-proof port 111 of the battery component 1 can be sealed together by welding, bonding, threaded connection, or interference fit. After connection, it is necessary to ensure that the three-way pipe 21 is in communication with the inner cavity of the outer shell 11 of the battery component 1. In this embodiment, welding is used to fix the first interface 211 of the three-way pipe 21 to the outer shell 11 of the battery component 1 to improve the reliability and sealing of the connection. In other embodiments, a threaded connection can also be used to fix the three-way pipe 21 to the explosion-proof port 111 of the outer shell 11, in which case it is necessary to ensure the sealing of the threaded connection.

[0056] like Figure 2 and Figure 4 As shown, the explosion venting unit in this embodiment includes an explosion venting membrane 22, which is fixedly disposed within the first interface 211 of the three-way pipe 21. The explosion venting membrane 22 is circular or elliptical. Specifically, the shape of the explosion venting membrane 22 matches the shape of the inner tube of the first interface 211 of the three-way pipe 21. The inner tube of the first interface 211 is generally circular; therefore, the explosion venting membrane 22 in this embodiment is circular. The explosion venting membrane 22 can be made of plastic sheet or metal sheet. If plastic sheet is used, the explosion venting membrane 22 needs to be fixed to the first interface 211 of the three-way pipe 21 by adhesive bonding. However, since the pressure-bearing capacity of adhesive bonding is insufficient, accidental explosion may occur. Therefore, in this embodiment, the explosion venting membrane 22 is made of metal sheet and fixed to the first interface 211 of the three-way pipe 21 by welding. To facilitate welding, the explosion relief membrane 22 is preferably made of aluminum sheet, and an annular boss 215 is provided in the first interface 211 of the three-way pipe 21, and the edge of the explosion relief membrane 22 is welded to the step of the annular boss 215.

[0057] In addition, to further ensure that the explosion relief diaphragm 22 can rupture smoothly under the pressure of thermal runaway flue gas, a groove is provided in the middle region of the explosion relief diaphragm 22 to form a weak explosion relief zone 221. This groove can be an annular groove or a cross-shaped groove. The groove effectively ensures that the weak explosion relief zone 221 can be broken through when the pressure of the outer shell 11 increases. In specific manufacturing, the groove can be formed by laser engraving on an aluminum sheet. When pressure relief and explosion are required, the gas rushes out, and this weak point ruptures first, achieving the purpose of safe pressure relief.

[0058] After the aforementioned explosion venting connection pipe 2 is fixed to the outer shell 11 of the battery component 1, the explosion venting connection pipes 2 of adjacent battery components 1 are connected by an insulating flexible pipe 3 to form an explosion venting manifold 4, thereby enabling the directional discharge of thermal runaway fumes from multiple battery components 1. Figure 2 and Figure 3As shown, to facilitate the connection between the tee pipe 21 and the insulating flexible pipe 3, multiple annular protrusions 214 are provided on the outer peripheral walls of the second and third interfaces of the tee pipe 21. The insulating flexible pipe is fitted onto the annular protrusions 214, making the connection of the insulating flexible pipe 3 more reliable. At the same time, the annular protrusions increase the contact area and friction between the tee pipe 21 and the insulating flexible pipe 3, improving the reliability of the connection and preventing the insulating flexible pipe 3 from falling off during use. In addition, the structural design of the annular protrusions ensures the sealing of the connection, effectively preventing liquid or gas leakage.

[0059] In this embodiment, the annular protrusion 214 consists of multiple pagoda-shaped cones disposed on the outer peripheral walls of the second interface 212 and the third interface 213 of the tee pipe 21, forming a pagoda-shaped connector structure. The barbed structure in the pagoda-shaped connector structure facilitates stable insertion and connection of the insulating flexible tube, resulting in a more reliable connection after insertion. Simultaneously, the unique design of the pagoda-shaped connector structure ensures the sealing of the connection points, effectively preventing liquid or gas leakage. Furthermore, the pagoda-shaped connector structure increases the contact area and friction between the tee pipe 21 and the insulating flexible tube 3, increasing the reliability of the connection and preventing the insulating flexible tube from detaching during use.

[0060] Furthermore, after the second interface 212 and the third interface 213 of the tee pipe 21 are fitted onto the pagoda joint structure, they can be secured with clamps 5. Clamps 5 ensure a tight connection between the insulating flexible pipe 3 and the tee pipe 21, preventing loosening and further guaranteeing the sealing reliability of the connection. Simultaneously, it allows for a simple and quick connection between the explosion-proof connecting pipe 2 and the insulating flexible pipe 3, with convenient disassembly. During installation, simply fitting the insulating flexible pipe 3 onto the pagoda joint structure is sufficient, eliminating the need for complex tools and cumbersome installation steps, resulting in high assembly efficiency.

[0061] The aforementioned explosion-proof connecting pipe 2 is connected to the insulating flexible pipe 3 to form the explosion-proof manifold 4, enabling the directional discharge of thermal runaway fumes from multiple battery components 1. Simultaneously, after the three-way pipe 21 of the battery component 1 is connected through the insulating flexible pipe 3, the insulating flexible pipe 3 undergoes a certain degree of deformation. This deformation can compensate for installation deviations in the explosion-proof connecting pipe 2, thereby reducing the installation difficulty of the explosion-proof connecting pipe 2 and consequently lowering the installation accuracy requirements for each battery component 1.

[0062] After the aforementioned insulating flexible tube 3 is connected to the explosion-proof connection tube 2 of the adjacent battery component 1, insulation between adjacent battery components 1 can also be achieved. Since the thermal runaway gas has a high temperature and may contain corrosive gases or molten impurities, the insulating flexible tube 3 needs to be made of a high-temperature resistant and corrosion-resistant insulating material. In this embodiment, the insulating flexible tube 3 can be made of a high-temperature resistant and high-pressure silicone tube. This high-temperature resistant and high-pressure silicone tube has excellent high-temperature resistance (250-300℃), and at room temperature, it also has good insulation resistance, improving the reliability of the battery components during use.

[0063] Furthermore, the aforementioned tee pipe 21 is generally made of metal. Since the thermal runaway flue gas has a high temperature, during its flow, heat from the tee pipe 21 may be transferred to the insulating flexible pipe 3, affecting it. In this case, a heat-insulating gasket can be installed between the second and third interfaces of the insulating flexible pipe 3 and the tee pipe 21. This gasket isolates heat transfer between the tee pipe 21 and the insulating flexible pipe 3, improving the reliability of the insulating flexible pipe 3 during use. Simultaneously, the gasket also reduces the risk of leakage. Alternatively, the tee pipe 21 can also be made of a metal with low thermal conductivity, reducing the rate at which heat is transferred from the tee pipe 21 to the insulating flexible pipe 3, further improving the reliability of the insulating flexible pipe 3 during use.

[0064] Example 2

[0065] like Figures 5 to 7 As shown, this embodiment provides a battery component 1, which includes a housing 11 and a plurality of individual cells 12 arranged in the same direction within the housing 11. In this embodiment, the individual cells 12 are prismatic cells, and their number can be adjusted according to actual needs. The inner cavity of each individual cell 12 includes an electrolyte area and a gas area. After the plurality of individual cells 12 are arranged in the same direction within the housing 11, a first clearance hole 14 is provided on the top plate of the housing 11 corresponding to the polarity terminal 13 of each individual cell 12. The polarity terminal 13 of each individual cell 12 extends out of the corresponding first clearance hole 14 as the polarity terminal of the battery component 1 (the polarity terminals 13 of all individual cells 12 located on one side serve as the positive polarity terminal of the battery component 1, and the polarity terminals 13 of all individual cells 12 located on the other side serve as the negative polarity terminal of the battery component 1). The area of ​​the top plate of the housing 11 corresponding to the first clearance hole 14 is fixedly sealed to the housing of the individual cells 12.

[0066] It should be noted that the polarity terminal 13 of the single cell 12 here can be the terminal post of the single cell 12. In order to prevent the terminal post of the single cell 12 from not being able to extend smoothly out of the first clearance hole 14 as the polarity terminal 13, a terminal post adapter can be connected to the terminal post of the single cell 12, and the overall structure of the terminal post of the single cell 12 and the terminal post adapter can be used as the polarity terminal 13 of the single cell 12.

[0067] like Figure 7 As shown, the inner cavity of the outer casing 11 and the inner cavities of each individual battery cell 12 are all connected. The above-mentioned connection effect can be achieved by providing a shared chamber in the outer casing 11, so that the inner cavity of the shared chamber and the inner cavities of all individual battery cells 12 are connected.

[0068] The aforementioned shared chamber can be an electrolyte shared chamber 113. The inner cavity of the electrolyte shared chamber 113 is connected to the electrolyte area inside all individual battery cells 12. Through the electrolyte shared chamber 113, each individual battery cell 12 can be in a uniform electrolyte environment, ensuring the uniformity of the electrolyte in each individual battery cell 12 and improving the performance and charge-discharge cycle life of the battery component 1. In this embodiment, the electrolyte shared chamber 113 is a liquid channel disposed between the bottom plate of the outer casing 11 and the bottom of each individual battery cell 12.

[0069] The aforementioned shared chamber can also be a gas-sharing chamber 112. The inner cavity of the gas-sharing chamber 112 is connected to the gas region of the inner cavity of all individual battery cells 12. The gas balance of each individual battery cell 12 is achieved through the gas-sharing chamber 112, which can also improve the performance of the battery component 1 and its charge-discharge cycle life. In this embodiment, the gas-sharing chamber 112 is a gas channel provided on the top plate of the outer casing 11. At this time, the top plate of the outer casing 11 is provided with a protrusion extending along the arrangement direction of the individual battery cells 12, and a gas channel is formed at the protrusion.

[0070] The aforementioned shared chamber can also be a gas-liquid shared chamber. The inner cavity of the gas-liquid shared chamber is connected to the electrolyte area and gas area of ​​all individual battery cells 12. Through a gas-liquid shared chamber, each individual battery cell 12 can be in a unified electrolyte environment and gas environment, which improves the performance of the battery component 1 and its charge-discharge cycle life.

[0071] like Figure 5 and Figure 6As shown, in order to extract thermal runaway fumes from the outer casing 11 of the battery component 1, this embodiment provides a vent 111 on the outer casing 11 that communicates with the inner cavity of the outer casing 11; normally, the vent 111 communicates with the shared chamber. The vent 111 is connected to the vent 2 in Embodiment 1. When the pressure inside the outer casing 11 reaches a certain value, the vent diaphragm 22 inside the vent 2 ruptures and opens, allowing the vent 2 to directionally discharge the thermal runaway fumes generated by the thermal runaway of any single battery cell 12 in the battery component 1, thus preventing the battery component 1 from catching fire or exploding.

[0072] The aforementioned explosion-proof connecting pipe 2 and the explosion-proof port 111 of the outer casing 11 can be connected in various ways, such as by threaded connection or bonding. In this embodiment, the first interface 211 of the tee pipe 21 and the explosion-proof port 111 of the outer casing 11 are fixedly connected by welding. This connection method can not only ensure the reliable installation of the explosion-proof connecting pipe 2, but also improve the sealing performance at the connection between the explosion-proof connecting pipe 2 and the explosion-proof port 111 of the battery component 1.

[0073] like Figure 10 As shown, to further enhance the safety of the battery component 1 during use in this embodiment, a heat transfer pipe 15 is connected to the portion of the polar terminal 13 of each individual battery 12 that extends out of the outer casing. The heat transfer pipe 15 exchanges heat with the polar terminal 13 of each individual battery 12. When the temperature of the battery component 1 is higher than a set threshold, a lower temperature heat transfer medium is introduced into the heat transfer pipe 15 to cool the battery component 1. When the temperature of the battery component 1 is lower than the set threshold, a higher temperature heat transfer medium is introduced into the heat transfer pipe 15 to heat the battery component 1. By controlling the temperature of the heat transfer medium, it can be ensured that the battery component 1 always operates at the normal operating temperature.

[0074] like Figure 8 As shown, in this embodiment, the polarity terminal 13 of each individual battery cell 12 is designed as a rectangular block structure. The length, width, and height of the rectangular block can be customized according to the actual application scenario to adapt to different battery specifications. In some other embodiments, a cylindrical polarity terminal 13 can also be used. The polarity terminal 13 includes a polarity terminal body, on which two parallel through slots 131 are formed. The through slots 131 penetrate the polarity terminal body in the x-direction, and the two through slots 131 are spaced apart in the y-direction.

[0075] like Figure 9 and Figure 10As shown, the top of the outer casing 11 of the battery component 1 has two heat transfer tubes 15, each extending along the x-axis. The cross-section of the heat transfer tube 15 is rectangular, and the tube wall is provided with multiple second clearance holes 151. The multiple second clearance holes 151 are arranged at intervals along the x-direction, and each second clearance hole 151 corresponds one-to-one with each polarity terminal 13 on the same side of the battery component 1. The two heat transfer tubes 15 are arranged along the y-axis and are respectively embedded in the through slots 131 of each polarity terminal 13 located on different sides. One heat transfer tube 15 is embedded in the through slot 131 of the total positive terminal of the battery component 1, and the other heat transfer tube 15 is embedded in the through slot 131 of the total negative terminal of the battery component 1. At this time, the width dimension (the dimension in the y-direction) of the above-mentioned through slot 131 needs to ensure that the tube wall of the corresponding heat transfer tube 15 can be embedded, and there is a certain gap between the inner wall of the heat transfer tube 15 and the polarity terminal body to allow the heat transfer medium to flow.

[0076] When the heat transfer tube 15 is embedded in the through groove 131, each polarity terminal 13 extends into the inner cavity of the heat transfer tube 15 through the second clearance hole 151 formed on the tube wall. Simultaneously, a certain gap is reserved between the polarity terminal 13 and the inner wall of the heat transfer tube 15, serving as a flow cavity for the heat transfer medium. To prevent the heat transfer medium from overflowing from the flow cavity, a sealing treatment can be applied between the polarity terminal 13 and the second clearance hole 151. Sealing measures can employ sealants such as high-temperature resistant, corrosion-resistant sealants with good insulation properties, or the installation of sealing rings or gaskets, to ensure stable flow of the heat transfer medium within the closed sub-cavity. This embodiment employs the sealing measure of installing sealing rings.

[0077] To improve the connection stability between the heat transfer tube 15 and the polar terminal 13, this embodiment provides a welding part on the side wall of the through groove 131, which is then welded and fixed to the heat transfer tube 15. Specifically, there are two feasible welding methods. First, a large area of ​​the side wall of the through groove 131 can be used as the welding part, and through welding can be performed with the heat transfer tube 15 to form a strong connection, effectively enhancing the bonding strength and heat conduction performance of the two. Second, the top of the side wall of the through groove 131 (a continuous plane extending along x) can be used as the welding part, and welding can be performed along the contact area between the top of the side wall of the through groove 131 and the wall of the heat transfer tube 15, ensuring that the weld is uniform and continuous, thereby achieving a tight connection between the two.

[0078] In this embodiment, the heat transfer pipe 15 not only serves as a heat dissipation component but also as an electrical conductor to achieve parallel connection of multiple individual battery cells 12. The polarity terminals 13 on the same side of the battery component 1 have the same polarity, while the polarity terminals 13 on different sides have opposite polarities. Two heat transfer pipes 15 are fixed to the polarity terminals 13 on both sides, realizing the parallel connection of multiple individual battery cells 12. When the heat transfer pipe 15 is an electrical conductor, it can be made of high-purity aluminum alloy, such as 6063 aluminum alloy. This material has good electrical conductivity, with a conductivity of 30–35 MS / m at 20°C, which can meet the current conduction requirements; it also has excellent thermal conductivity, with a thermal conductivity of approximately 200–230 W / (m·K), enabling efficient heat dissipation.

[0079] In this embodiment, for a heat transfer tube 15 on the same side, the heat transfer medium flows in from one end of the heat transfer tube 15, flows sequentially through all the polar terminals 13 located inside the heat transfer tube 15, and flows out from the other end of the heat transfer tube 15. A portion of the structure of the battery's polar terminals 13 is directly placed inside the heat transfer tube 15, allowing direct contact between the polar terminals 13 and the heat transfer medium. In conventional heat exchange methods, heat needs to pass through multiple levels of transfer to achieve exchange. However, in this embodiment, the polar terminals 13 are directly connected to the heat transfer medium, allowing the heat transfer medium to directly act on the polar terminals 13 without energy loss in other intermediate stages, significantly improving the utilization efficiency of the heat transfer medium. This means that the same amount of heat transfer medium can play a greater role in heat transfer, greatly improving the efficiency of heat transfer. While improving the utilization efficiency of the heat transfer medium, the overall heat exchange efficiency of the battery component 1 is also greatly improved. The problem that might have led to a decline in battery performance due to untimely heat exchange is solved by this efficient heat exchange design, thereby ensuring that battery component 1 is always in good working condition, extending the service life of battery component 1 and improving its working stability.

[0080] To further improve the heat transfer performance of the polarity terminal 13, this embodiment provides a through-hole 132 on the polarity terminal body, which extends through the polarity terminal body along the x-direction. In practical applications, the size and number of through-holes 132 can be flexibly adjusted according to specific needs, provided that the conductivity of the polarity terminal 13 is not affected. The through-hole 132 increases the contact area between the polarity terminal body and the heat transfer medium, thereby significantly improving heat transfer efficiency. When the heat transfer medium flows through the polarity terminal body, it can more fully surround the polarity terminal body through the through-hole 132. Previously, the heat transfer medium could only exchange heat with the surface of the polarity terminal body; now, internal through-heat exchange can be achieved through the through-hole 132, which greatly increases the amount of heat transferred per unit time and accelerates the heat dissipation rate of the polarity terminal 13.

[0081] In other embodiments, other structures may be processed on the outer wall of the polar terminal body to increase the heat exchange area. For ease of description, the structures that can increase the heat exchange area are collectively referred to as functional structures. Such functional structures may include dot-shaped pits and protrusions on the outer wall of the polar terminal body, annular grooves on the outer wall of the polar terminal body, and through grooves 131 on the polar terminal body, etc.

[0082] like Figure 7 As shown, in this embodiment, an insulating sealant layer 16 is laid on the top plate of the outer casing 11. The insulating sealant layer 16 covers at least a portion of the structure of the heat transfer tube 15 and the polar terminal 13, with the top of the heat transfer tube 15 exposed, serving as an electrical connection. During the operation of the battery component 1, internal temperature changes may cause water vapor condensation. The insulating sealant layer 16 can isolate external moisture, reduce internal humidity changes, and prevent water droplets from forming on the surfaces of the heat transfer tube 15 and the polar terminal 13, thus preventing short circuits and component corrosion caused by condensation. In addition, covering a portion of the structure of the heat transfer tube 15 and the polar terminal 13 makes the connection between components tighter, reducing relative displacement between components under vibration, impact, and other conditions, and enhancing the structural stability of the entire battery component 1. Furthermore, the insulating sealant penetrating into the sealing ring area can further improve the sealing performance between the polar terminal 13 and the second clearance hole 151.

[0083] Example 3

[0084] like Figure 11 and Figure 12 As shown, this embodiment provides a battery cluster, which includes at least one row of battery components 1, each row of battery components 1 including at least two battery components 1. If multiple rows of battery components 1 are included, the multiple rows of battery components 1 are arranged sequentially from top to bottom. The battery cluster in the figure only includes one row of battery components 1.

[0085] To prevent the thermal runaway fumes from individual cells 12 within a battery component 1 from spreading throughout the container and causing safety hazards, this embodiment connects the explosion venting pipes 2 of all battery components 1 within the battery cluster using an insulating flexible pipe 3 to form an explosion venting manifold 4. After connection, one end of the explosion venting manifold 4 is sealed, while the other end is open, serving as the exhaust outlet for thermal runaway fumes from the battery cluster. When a single cell 12 within any battery component 1 within the battery cluster experiences thermal runaway, the thermal runaway fumes can be discharged through the explosion venting manifold 4, reducing the risk of combustion or explosion of the battery component 1 or the battery cluster.

[0086] The explosion-proof connecting pipes 2 of adjacent battery components 1 are connected by insulating flexible pipes 3 to form an explosion-proof manifold 4, which is a spliced ​​structure. Simultaneously, the insulating flexible pipe 3 has a certain degree of deformation. This deformation can compensate for installation errors of the explosion-proof connecting pipes 2 and spacing deviations of the battery components 1, thus reducing the installation accuracy requirements of the explosion-proof connecting pipes 2 of each battery component 1 and lowering the installation difficulty of the battery components 1. Furthermore, the insulating flexible pipe 3 must also provide insulation between adjacent battery components 1, generally made of insulating materials, to improve the reliability of the battery components 1 during use.

[0087] like Figure 12 and Figure 13 As shown, the assembly process of the explosion venting manifold 4 of this structure is as follows: First, when manufacturing the battery components, each explosion venting connecting pipe 2 is fixed on the outer shell of the battery component. Second, multiple battery components 1 with explosion venting connecting pipes 2 installed are arranged in sequence, with the explosion venting connecting pipes 2 of each battery component 1 located on the same side of the battery component 1. An insulating flexible pipe 3 is placed between adjacent battery components 1, and both ends of the insulating flexible pipe 3 are respectively fitted onto the explosion venting connecting pipe 2. Then, the insulating flexible pipe 3 of the explosion venting connecting pipe 2 is tightened again by clamps 5.

[0088] After the above-mentioned insulating flexible tube 3 and the three-way tubes of each battery component are connected by clamps, the connection is not only more convenient, but the clamps can also make the insulating flexible tube and the three-way tube tightly connected, not easy to loosen, and improve the reliability of the connection between the insulating flexible tube and the three-way tube.

[0089] When the tee tube of the battery component is connected to the insulating flexible tube by threads, the following defects may occur:

[0090] First, due to installation errors at the first interface of the tee pipe, the positions of the second and third interfaces of the tee pipe may be deviated. For example, the axes of the second and third interfaces may be tilted on the horizontal plane. In this case, the position of the tee pipe needs to be adjusted, otherwise the installation with the insulated flexible pipe cannot be carried out.

[0091] Secondly, when using threaded connections, the thread depth of the second and third interfaces of the tee pipe and the insulating flexible pipe must also be considered. Different thread depths in threaded connections may cause the insulating flexible pipe to bend, resulting in poor subsequent venting and posing a certain safety hazard.

[0092] This utility model uses an insulated flexible tube 3 and a clamp to form an explosion-proof connection tube 2. When connected by the clamp, it can accommodate a certain degree of misalignment and offset of the tee pipe. When the above problems occur, there is no need to readjust the position of the tee pipe, nor is it necessary to consider the length of the thread during connection. Simply put the insulated flexible tube on the tee pipe and fix it with the clamp. The installation is simple and reliable.

Claims

1. A venting connection pipe, characterized in that, Includes a tee pipe and an explosion venting unit; The first port of the three-way pipe is used to connect to the explosion vent of the battery component, and the second and third ports are used to connect to the insulating flexible pipes that constitute the explosion venting manifold, wherein the first port of the three-way pipe is perpendicular to the second and third ports. The explosion relief unit includes an explosion relief membrane, which is fixedly installed in the first port of the three-way pipe.

2. The explosion relief connecting pipe according to claim 1, characterized in that, The outer peripheral walls of the second and third interfaces of the tee are provided with multiple annular protrusions, and the insulating flexible tube is fitted onto the annular protrusions.

3. The explosion relief connecting pipe according to claim 1 or 2, characterized in that, The first interface of the three-way pipe is provided with an annular boss, and the explosion relief membrane is embedded in the first interface and welded to the annular boss.

4. The explosion relief connecting pipe according to claim 3, characterized in that, The explosion venting membrane has a groove in the middle area to form a weak explosion venting zone.

5. A battery component, characterized in that, It includes a housing and multiple individual batteries disposed within the housing; the housing is provided with an explosion vent, and an explosion vent connection pipe as described in any one of claims 1 to 4 is fixedly connected to the explosion vent.

6. The battery component according to claim 5, characterized in that, The first port of the tee pipe is fixedly connected to the explosion vent of the outer shell by welding.

7. The battery component according to claim 6, characterized in that, The top plate of the battery component housing has a first clearance hole corresponding to the polarity terminal of each individual battery cell; the polarity terminal of each individual battery cell extends out of the first clearance hole, and the area of ​​the top plate of the housing corresponding to the first clearance hole is fixedly sealed with the housing of the individual battery cell; the housing is provided with a shared chamber, and the inner cavity of the shared chamber is connected to the inner cavity of all individual batteries cell.

8. A battery cluster, characterized in that, It includes a plurality of battery components as described in any one of claims 5 to 7, wherein the plurality of battery components are arranged in sequence; the explosion relief connection pipes of adjacent battery components are connected by an insulating flexible pipe to form an explosion relief manifold.

9. The battery cluster according to claim 8, characterized in that, The insulated flexible tube is fitted onto the second and third interfaces of the tee pipe and then secured with clamps.

10. The battery cluster according to claim 8, characterized in that, A heat-insulating sealing gasket is provided between the second and third interfaces of the insulated flexible tube and the tee tube.

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