WO2024040573A1

WO2024040573A1 - Battery system, electric device and energy storage device

Info

Publication number: WO2024040573A1
Application number: PCT/CN2022/115120
Authority: WO
Inventors: 王学辉; 陈小波; 高雄伟; 胡璐
Original assignee: 宁德时代新能源科技股份有限公司
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2024-02-29

Abstract

The present disclosure provides a battery system, an electric device and an energy storage device. The battery system comprises a battery. The battery comprises: a box, and a battery cell arranged in the box. The battery cell comprises: a cell casing, a battery core located in the cell casing, and a first pressure-relief mechanism arranged on the cell casing. The battery system further comprises a smoke gas discharge channel, wherein the smoke gas discharge channel is configured to discharge, to the outside of the battery system through the smoke gas discharge channel, gas which is discharged from the battery cell via the first pressure-relief mechanism. The smoke gas discharge channel comprises one or more climbing sections, a stop end of the climbing section being higher than a start end thereof. The electric device and the energy storage device each comprise the battery system.

Description

Battery systems, electrical equipment and energy storage equipment

Technical field

The present disclosure relates to the field of battery technology, and in particular, to a battery system, electrical equipment and energy storage equipment.

Background technique

When the battery of the battery energy storage system or power battery system (collectively referred to as the battery system) undergoes thermal runaway, a large amount of flammable gas will be released. After these combustible gases are discharged to the outside of the battery system, if they come into contact with combustion aids such as oxygen, they can easily be The ignition source ignites, causing violent combustion or even explosion, thus creating a safety hazard.

In related technologies, the battery system collects and discharges the smoke generated during thermal runaway, and flows along the horizontal smoke discharge channel to the pressure relief port for discharge. In this related technology, the flammable gas generated by thermal runaway is collected and discharged. The temperature of the discharged flue gas is relatively high, and the flue gas contains a large amount of flammable electrolyte vapor, so there is still a large safety hazard.

Contents of the invention

The present disclosure provides a battery system, electrical equipment and energy storage equipment that collects, processes and discharges combustible gas generated by thermal runaway, aiming to reduce potential safety risks of the battery system.

A first aspect of the present disclosure provides a battery system, including a battery. The battery includes a box and a battery cell disposed in the box. The battery cell includes a cell casing, a battery core located in the cell casing, and a battery cell disposed in the cell casing. The first pressure relief mechanism on the Wherein, the battery system includes a smoke exhaust channel, and the smoke exhaust channel is configured to discharge the gas in the single housing discharged from the first pressure relief mechanism out of the battery system along the smoke exhaust channel; the smoke exhaust channel includes one or more Climbing section, the height of the end of the climbing section is higher than the height of the starting end.

The smoke emission channel of the battery system of the present disclosure includes one or more climbing sections. The height of the terminal end of the climbing section is higher than the height of the starting end. After the battery thermal runaway occurs, the smoke discharged from the first pressure relief mechanism passes through the climbing section. During the climbing process, the potential energy of the flue gas increases, and the kinetic energy and internal energy decrease, which is conducive to lowering the temperature of the flue gas. Moreover, the electrolyte vapor is easier to cool down and condense, and is more likely to interact with the combustible gas produced by thermal runaway under the action of gravity. The remaining gases are separated, so that the flue gas discharged from the flue gas discharge channel contains less electrolyte vapor, thereby helping to reduce safety hazards.

In the battery system of some embodiments, at least one climbing section is configured such that the flue gas therein flows upward obliquely relative to the horizontal direction.

At least one climbing section is configured so that the flue gas in it flows upward obliquely relative to the horizontal direction, so that the climbing section has a longer flow path within a certain climbing height, which is conducive to lowering the temperature of the flue gas and more fully separating the electrolyte.

In the battery system of some embodiments, at least one climbing section is located inside the box; and/or at least one climbing section is located outside the box.

The climbing section can be arranged inside or outside the battery box, or the climbing section can be arranged both inside and outside the battery box, which facilitates flexible setting according to the installation environment and usage environment of the battery system. Climb section.

In the battery system of some embodiments, at least one climbing section extends from one of two opposite ends of the battery to the other.

The climbing section extending from one end to the other of the two opposite ends of the battery is conducive to making the climbing section have a certain length, which is conducive to fully cooling the flue gas and separating the electrolyte, and is conducive to reducing safety hazards.

In the battery system of some embodiments, at least two of the multiple climbing sections have the same angle with the horizontal plane; and/or at least two of the multiple climbing sections have different angles with the horizontal plane.

At least two of the multiple climbing sections have the same angle with the horizontal plane and/or at least two of the multiple climbing sections have different angles with the horizontal plane, which is conducive to full and reasonable utilization of the structure of the battery itself and/ Or the structure and space of the battery system should reasonably set the number, position and angle of the climbing sections, so as to facilitate the full cooling of the flue gas and the separation of the electrolyte.

In the battery system of some embodiments, and/or at least two climbing sections among the plurality of climbing sections are arranged adjacently; and/or at least two climbing sections among the plurality of climbing sections are arranged at intervals.

The arrangement of at least two climbing sections among multiple climbing sections adjacent to each other and/or the arrangement of at least two climbing sections among multiple climbing sections at intervals are conducive to full and reasonable utilization of the structure of the battery itself and/or the reasonable arrangement of the structure and space of the battery system. The number, position and angle of the climbing sections are conducive to sufficient flue gas cooling and electrolyte separation.

In the battery system of some embodiments, at least one climbing section is formed by a box and a battery pack including a plurality of battery cells.

At least one climbing section is formed by a box and a battery pack including multiple battery cells, which is conducive to increasing the cross-sectional area of the flue gas discharge channel as much as possible, reducing the flue gas pressure, making the electrolyte more likely to condense, and interacting with the combustible gas generated by thermal runaway. The remaining gases in the body are more fully separated, which helps reduce safety hazards.

In the battery system of some embodiments, the battery includes a thermal management component disposed in the case, and at least part of the smoke exhaust channel is formed by the thermal management component and the case.

At least part of the flue gas emission channel is formed by the thermal management component and the box, which is conducive to the temperature of the combustible gas generated by the thermal runaway being reduced under the action of the thermal management component, making the electrolyte more likely to condense and interact with the remaining gases in the combustible gas generated by the thermal runaway. The separation is more complete, thus helping to reduce safety hazards.

In the battery system of some embodiments, the battery includes a thermal management component disposed in the box, and at least one climbing section is located on a side of the thermal management component away from the battery cell and between the thermal management component and the box; or the climbing section and thermal management components are located at opposite ends of the battery cell.

At least one climbing section is located on the side of the thermal management component away from the battery cell and between the thermal management component and the box, which facilitates the combustible gas generated by thermal runaway to lower its temperature under the action of the thermal management component while or before climbing. , making the electrolyte easier to condense and more fully separated from the remaining gases in the combustible gas body generated by thermal runaway, thus helping to reduce safety hazards.

Locating the climbing section and the thermal management component at opposite ends of the battery cell facilitates the installation of the climbing section and the thermal management component respectively, so that the arrangement of the two is not affected by the other.

In the battery system of some embodiments, the thermal management component is located below the battery cell, and at least one climbing section is located below the thermal management component.

The thermal management component is located below the battery cell, and at least one climbing section is located below the thermal management component, which facilitates the separation of the battery cell and the combustible gas generated by thermal runaway through the thermal management component, and reduces the impact of the combustible gas generated by thermal runaway on the battery cell. In addition, thermal management components can cool the flue gas, lower the temperature of the flue gas, make the electrolyte condense more easily, and be more fully separated from the remaining gases in the combustible gas body generated by thermal runaway, thus helping to reduce safety hazards.

In the battery system of some embodiments, the battery includes a nozzle configured to inject the heat exchange medium into the flue gas discharge channel.

This setting is conducive to reducing the temperature of the flue gas, allowing the electrolyte to be more fully separated from the remaining gases in the combustible gas produced by thermal runaway, thereby helping to reduce potential safety hazards.

In the battery system of some embodiments, the nozzle is configured to inject the heat exchange medium into at least one climbing section.

Injecting the heat exchange medium into the climbing section will help more electrolyte and the rest of the combustible gas to separate under the action of gravity, which will help reduce safety hazards.

In the battery system of some embodiments, at least one climbing section is located above the battery cell; and/or at least one climbing section is located below the battery cell.

The climbing section can be arranged above the battery cell, or can be arranged below the battery cell, or there are climbing sections both above and below the battery cell, which facilitates flexible arrangement of the climbing section according to the internal structure of the battery.

In the battery system of some embodiments, the battery includes a second pressure relief mechanism, the second pressure relief mechanism is provided on the box, and the second pressure relief mechanism is located upstream or at the end of the smoke exhaust channel.

A part of the smoke discharge channel can be set up after the second pressure relief mechanism, that is, the second pressure relief mechanism is located upstream of the end of the smoke discharge channel, or the second pressure relief mechanism can be used as the end of the smoke discharge channel. This arrangement makes the smoke The position and length of the discharge channel can be more flexible, which will help reduce the temperature of the flue gas to below the specified temperature and the content of the electrolyte in the flue gas to reduce to the specified content before being discharged to the outside, thereby helping to reduce safety hazards.

In the battery system of some embodiments, the battery system includes: at least one layered plate configured to layer the smoke emission channel in the up and down direction and form a multi-layer baffle flow channel; and/or at least one layered plate. The baffle is disposed in the flue gas discharge channel and is configured to layer the flue gas discharge channel in the horizontal direction and form a multi-layer baffle flow channel.

Setting up layered plates that layer the flue gas discharge channel in the up and down direction and forming a multi-layer baffle flow channel, and setting up baffle plates in the flue gas discharge channel, on the one hand, can extend the flow path of the flue gas and enable convection. On the other hand, the centrifugal force during the deflection of the flue gas can be used to assist in the separation of the electrolyte and other gases, so that the electrolyte and the remaining gases in the combustible gas produced by thermal runaway are more fully separated, which is beneficial to reducing safety risks.

In the battery system of some embodiments, at least part of the baffle is disposed in the climbing section.

Setting up baffles in the climbing section helps the flue gas to lower its temperature while climbing, and lengthens the climbing path, which helps to lower the temperature of the flue gas, making it easier for the electrolyte to condense and more easily separate from the remaining gases in the combustible gas body generated by thermal runaway. sufficient, thus helping to reduce safety hazards.

In the battery system of some embodiments, at least part of the baffle is configured to reciprocate the gas in the smoke discharge channel in a direction parallel to the bottom surface of the box; and/or at least part of the baffle is configured to The gas in the flue gas discharge channel is deflected back and forth in a direction perpendicular to the bottom surface of the box.

The arrangement of the above baffles in the flue gas discharge channel makes the flow path of the flue gas more flexible, which is conducive to extending the flow path of the flue gas and making the flue gas baffle obvious, thereby facilitating the use of centrifugal force to separate the electrolyte and other gases. The electrolyte is more fully separated from the remaining gases in the combustible gas produced by thermal runaway, thus helping to reduce safety hazards.

In the battery system of some embodiments, at least one climbing section includes a diverging flow channel with a flow area gradually increasing along the direction of flue gas flow.

The climbing section includes an expanded flow channel with a gradually increasing flow area along the direction of flue gas flow, which can gradually reduce the pressure and flow rate of the flue gas during the flow process, making the electrolyte more likely to condense and easily separated from the rest of the combustible gas, thereby facilitating Reduce safety risks.

In the battery system of some embodiments, at least one climbing section includes at least one wall with an angle between 5° and 60° with the horizontal plane.

Reasonably setting the angle between the wall of the climbing section and the horizontal plane will help ensure that a certain climbing length of the climbing section corresponds to a certain climbing height, which will help reduce the temperature of the flue gas and make the electrolyte separation more complete.

The flue gas emission channel includes other emission sections other than the climbing section, which is conducive to increasing the length of the flue gas emission channel. The flue gas is deflected at the junction of the climbing section and other emission sections, which is beneficial to reducing the flue gas temperature and removing the smoke from the flue gas. Separate the electrolyte to help reduce safety hazards.

In the battery system of some embodiments, the battery system includes a battery mounting part, the battery mounting part includes a mounting platform, and the battery is mounted on the mounting platform.

The battery is installed on the installation platform. The working position of the battery is stable, which is conducive to the stable position of the flue gas discharge channel, which helps the climbing section maintain its direction, and helps the climbing section function stably when flue gas is discharged, thereby helping to reduce safety hazards.

In the battery system of some embodiments, the bottom surface of the battery is disposed on the mounting platform inclined relative to the horizontal plane.

By arranging the bottom surface of the battery on the installation platform at an angle relative to the horizontal plane, the smoke emission flow channel inside the battery that is parallel to the bottom surface of the battery can form a climbing section, and the smoke emission flow can be achieved without modifying the internal structure of the battery. The road includes climbing sections.

In the battery system of some embodiments, the angle between the bottom surface of the battery and the horizontal plane is 5° to 60°.

Making the angle between the bottom surface of the battery and the horizontal plane is 5° to 60°, which will help ensure that a certain climbing length of the climbing section corresponds to a certain climbing height, which will help reduce the temperature of the flue gas and make the electrolyte separation more complete.

In the battery system of some embodiments, the battery mounting portion includes a mounting portion flue wall disposed on the mounting platform, and at least one climbing section is formed by the mounting portion flue wall or is formed by the mounting portion flue wall and the box.

A climbing section is set outside the box through the installation flue wall. When achieving the same climbing height requirement, no or fewer climbing sections can be set inside the battery, thereby reducing or eliminating the need to modify the internal structure of the battery; It is also possible to set the length of the flue gas emission channel and the length and climbing height of the climbing section according to the gas emission needs after thermal runaway without being restricted by the structure of the battery, making it easier to meet the flue gas treatment needs.

In the battery system of some embodiments, the battery installation part includes a third pressure relief mechanism, and the third pressure relief mechanism is disposed on the flue wall of the installation part and is located at the end of the smoke discharge channel.

Disposing the third pressure relief mechanism at the end of the flue gas discharge channel can control the flow and pressure of the gas discharged from the flue gas discharge channel, which is beneficial to reducing safety hazards.

In the battery system of some embodiments, the pressure relief port of the first pressure relief mechanism faces the smoke exhaust channel to discharge gas directly into the smoke exhaust channel.

The pressure relief port of the first pressure relief mechanism faces the flue gas discharge channel, so that the combustible gas generated by thermal runaway can be discharged from the pressure relief port of the first pressure relief mechanism and immediately filled into the flue gas discharge channel, and then guided through the flue gas discharge channel. , discharged from the battery system after treatment, which can reduce the impact of flammable gas generated by thermal runaway on battery cells that have not experienced thermal runaway.

In some embodiments of the battery system, the battery system is a power battery system or a battery energy storage system.

Whether the battery system in the embodiment of the present disclosure is a power battery system or a battery energy storage system, it can reduce safety hazards.

A second aspect of the disclosure provides an electrical device, including the battery system of the first aspect of the disclosure, and the battery system is used to supply power to the electrical device.

The electrical equipment of the present disclosure has the advantages of the battery system of the present disclosure.

A third aspect of the disclosure provides an energy storage device, including the battery system of the first aspect of the disclosure. The energy storage device uses the battery of the battery system as an energy storage carrier.

The energy storage device of the present disclosure has the advantages of the battery system of the present disclosure.

Description of drawings

In order to explain the technical solutions of the embodiments of the present disclosure more clearly, the drawings required to be used in the embodiments of the present disclosure will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. Those of ordinary skill in the art can also obtain other drawings based on the drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of electrical equipment according to an embodiment of the present disclosure;

Figure 2 is an exploded structural diagram of a battery according to an embodiment of the present disclosure;

Figure 3 is an exploded structural diagram of a battery cell according to an embodiment of the present disclosure;

Figure 4 is a schematic structural diagram of a battery system according to an embodiment of the present disclosure;

Figure 5 is a schematic diagram of the principle structure of a battery system according to an embodiment of the present disclosure;

Figure 6 is a schematic structural diagram of a battery system according to an embodiment of the present disclosure;

Figure 7 is a schematic cross-sectional structural diagram of a battery system according to an embodiment of the present disclosure;

Figure 8 is a partially enlarged structural schematic diagram of the battery system of the embodiment shown in Figure 7;

Figure 9 is a schematic structural diagram of a battery system according to an embodiment of the present disclosure;

Figure 10 is a schematic diagram of the exhaust path of the flue gas discharge channel including a baffle in the embodiment shown in Figure 9;

Figure 11 is a schematic diagram of the principle structure of a battery system according to an embodiment of the present disclosure; and

FIG. 12 is a schematic structural diagram of a battery system according to an embodiment of the present disclosure.

In the drawings, the drawings are not drawn to actual scale.

Detailed ways

The embodiments of the present disclosure will be described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the disclosure, but cannot be used to limit the scope of the disclosure, that is, the disclosure is not limited to the described embodiments.

In the description of the present disclosure, it should be noted that, unless otherwise specified, "plurality" means more than two; the terms "upper", "lower", "left", "right", "inside", " The orientation or positional relationship indicated such as "outside" is only to facilitate the description of the present disclosure and simplify the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. Public restrictions. Furthermore, the terms "first," "second," "third," etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. "Vertical" is not vertical in the strict sense, but within the allowable error range. "Parallel" is not parallel in the strict sense, but within the allowable error range.

The directional words appearing in the following description are the directions shown in the figures and do not limit the specific structure of the present disclosure. In the description of the present disclosure, it should also be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a removable connection. Detachable connection, or integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this disclosure may be understood based on specific circumstances.

In the process of forming the technical solution of the present disclosure, the inventor discovered that if only the flue gas is collected and discharged without electrolyte separation and treatment, there are still major safety risks.

Therefore, the present disclosure provides a battery system that utilizes flue gas emission channels to collect, process, and discharge combustible gases generated by thermal runaway to reduce potential safety risks of the battery system. The battery system can be a power battery system or a battery energy storage system. Furthermore, the present disclosure also provides an electrical device with the battery system and an energy storage device with the battery system.

Embodiments of the present disclosure provide an electrical device that uses a battery system as a power source, and the battery system is configured to provide electric energy to the electrical device. Electrical equipment can be, but is not limited to, portable equipment, laptops, battery cars, electric cars, ships, spacecraft, electric toys, electric tools, etc. For example, space vehicles include airplanes, rockets, space shuttles, and spacecrafts, among others. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, electric airplane toys, etc. Power tools include metal-cutting power tools, abrasive power tools, assembly power tools and railway power tools such as drills, power grinders, power wrenches, power screwdrivers, hammers, impact drills, concrete vibrators and planers.

Embodiments of the present disclosure provide an energy storage device that uses a battery of a battery system as an energy storage carrier. In this energy storage device, the battery system is a battery energy storage system. Battery energy storage systems use secondary batteries such as lithium batteries/lead batteries as energy storage carriers to store electrical energy within a certain period of time and supply electric energy within a certain period of time.

The battery mentioned in the embodiments of the present disclosure refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this disclosure may include a battery module or a battery pack, or the like. Batteries generally include a box for packaging one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

In the present disclosure, the battery cells may include lithium ion secondary batteries, lithium ion primary batteries, lithium sulfur batteries, sodium lithium ion batteries, sodium ion batteries or magnesium ion batteries, etc., which are not limited in the embodiments of the present disclosure. The battery cell may be in the shape of a cylinder, a flat body, a rectangular parallelepiped or other shapes, and the embodiments of the present disclosure are not limited thereto. Battery cells are generally divided into three types according to packaging methods: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present disclosure are not limited to this.

The battery cell mainly includes battery core, electrolyte, casing and end cap components. The battery core may include one or two or more electrode components. The battery core is packaged in the accommodation space of the housing through the end cover of the end cover assembly, the accommodation space is filled with electrolyte, and the electrode assembly is arranged in the accommodation space of the housing. The electrode assembly is the component in the battery cell where electrochemical reactions occur.

The electrode assembly mainly consists of a positive electrode piece, a negative electrode piece and a separator. Battery cells mainly rely on the movement of metal ions between the positive and negative electrodes to work. The electrode assembly can be a rolled structure or a laminated structure.

The casing is a component used to provide an accommodation space for accommodating the electrode assembly, electrolyte, and other components therein. The housing can be of various shapes and sizes, such as cuboid, cylinder, hexagonal prism, etc. Specifically, the shape of the housing can be determined according to the specific shape and size of the electrode assembly. The material of the shell can be selected from copper, iron, aluminum, stainless steel, aluminum alloy, plastic and other materials.

The end cap refers to a component that covers the opening of the casing to isolate the internal environment of the battery cell from the external environment. The casing and the end cap together constitute the single shell of the battery cell. The shape of the end cap can be adapted to the shape of the housing to fit the housing. Optionally, the end cap can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap is less likely to deform when subjected to extrusion and collision, allowing the battery cell to have higher structural strength. Safety features could also be improved. Functional components such as electrode terminals can be provided on the end cap. The electrode terminal may be used to electrically connect with the electrode assembly for outputting or inputting electrical energy of the battery cell. The end cap can also be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not limited in the embodiments of the present disclosure.

A pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold can also be provided on the cell casing, such as the end cover or the casing. When the internal pressure or temperature of the battery cell reaches a predetermined threshold, the pressure relief mechanism takes action or the weak structure provided in the pressure relief mechanism is destroyed, thereby forming an opening or channel for the pressure or temperature inside the cell casing to be released. As shown in FIG. 3 , the pressure relief mechanism (first pressure relief mechanism 20A) of the battery cell 20 is, for example, an explosion-proof valve provided on the end cover.

The housing and the end cover may be independent components. The housing is provided with an opening, and the end cover covers the opening at the opening to form an internal environment of the battery cell. Without limitation, the end cover and the shell can also be integrated. Specifically, the end cover and the shell can form a common connection surface before other components are installed into the shell. When it is necessary to encapsulate the inside of the shell, The end cap is closed with the shell, and the shell and the end cap are packaged into one body.

In the battery cells of some embodiments, an insulating member may be provided inside the end cover, and the insulating member may be used to isolate the electrical connection components in the case from the end cover to reduce the risk of short circuit. For example, the insulating member may be an insulating plate, which may be made of plastic, rubber, or other materials.

The end cover and various components provided on the end cover, such as electrode terminals, explosion-proof valves, insulation plates, etc., form the end cover assembly.

The following describes the electrical equipment and its battery B, taking the electrical equipment-vehicle D in some embodiments of the present disclosure as an example.

Please refer to Figure 1. Figure 1 is a schematic structural diagram of a vehicle D provided by some embodiments of the present disclosure. Vehicle D can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or a range-extended vehicle. Vehicle D is provided with battery B inside, and battery B can be placed at the bottom, head, or tail of vehicle D. Battery B may be used to power vehicle D, for example, as the operating power source of vehicle D.

In some embodiments of the present disclosure, battery B can not only be used as an operating power source of vehicle D, but also can be used as a driving power source of vehicle D, replacing or partially replacing fuel or natural gas to provide driving power for vehicle D.

Please refer to Figure 2. Figure 2 is an exploded view of battery B provided by some embodiments of the present disclosure.

Battery B includes a case 1 and battery cells 20 accommodated in the case 1 . The box body 1 includes a box shell 11 and a box cover 12 that is fastened to the box shell 11 . The box body 1 is used to provide an accommodation space for the battery cells 20 . In the above embodiments, the box 1 is a rectangular parallelepiped as a whole. In embodiments not shown in the figures, the box 1 can also be in other shapes, such as a cylinder. The box 1 may also be provided with a pressure relief mechanism and a second pressure relief mechanism 1A for releasing the internal pressure when the internal pressure or temperature of the battery B reaches a threshold value. When the internal pressure or temperature of the box 1 reaches a predetermined threshold, the second pressure relief mechanism 1A takes action or the weak structure provided in the second pressure relief mechanism 1A is destroyed, thereby forming an opening for the internal pressure or temperature to be released. or channel. The second pressure relief mechanism 1A is, for example, an explosion-proof valve provided on the tank cover 12 .

In battery B, there are a plurality of battery cells 20 , and the plurality of battery cells 20 can be connected in series, in parallel, or in a mixed manner. Mixed connection means that multiple battery cells 20 are connected in series and in parallel. The plurality of battery cells 20 can be directly connected in series or in parallel or mixed together, and then the whole composed of the plurality of battery cells 20 is accommodated in the box 1 .

As shown in FIG. 2 , battery B may be composed of multiple battery cells 20 connected in series, parallel, or mixed to form a battery pack 2 . The battery pack 2 may be in the form of a battery module. A plurality of battery packs 2 are connected in series, parallel or mixed to form a whole, and are accommodated in the box 1 . Battery B may also include other structures. For example, battery B may also include a bus component for realizing electrical connections between multiple battery cells 20 .

Please refer to Figure 3. FIG. 3 is an exploded structural diagram of a battery cell 20 according to an embodiment of the present disclosure. The battery cell 20 in the embodiment of the present disclosure includes an end cap assembly 21, a casing 22 and a battery core. The battery core includes two electrode assemblies 24.

The end cap assembly 21 includes an end cap 211, a positive terminal 212, a negative terminal 213, an explosion-proof valve 20A as a first pressure relief mechanism, and an insulating plate 215. The end cap 211 is used to cooperate with the casing 22 to package the battery core in the sealed accommodation space formed by the end cap 211 and the casing 22 . The positive terminal 212 and the negative terminal 213 can be electrically connected to the corresponding positive tab 242 and negative tab 243 of the electrode assembly 24 through the positive connecting piece 22 and the negative connecting piece 23 respectively. The insulating plate 215 is arranged between the end cover 211 and the positive electrode connecting piece 22 and the negative electrode connecting piece 23 to achieve insulation between the end cover 211 and the positive electrode connecting piece 22 and the negative electrode connecting piece 23 as well as each electrode assembly 24 .

The battery system according to the embodiment of the present disclosure will be described below with reference to FIGS. 4 to 12 .

As shown in FIGS. 4 to 12 , embodiments of the present disclosure provide a battery system. The battery system includes battery B. Battery B includes a box 1 and a battery cell 20 disposed in the box 1. The battery cell 20 includes a cell casing, a battery core located in the cell casing, and a battery cell disposed on the cell casing. The first pressure relief mechanism 20A. Wherein, the battery system includes a smoke exhaust channel P, and the smoke exhaust channel P is configured to discharge the gas in the cell casing discharged from the first pressure relief mechanism 20A out of the battery system along the smoke exhaust channel P. The flue gas discharge channel P includes one or more climbing sections P1, and the height of the terminal end of the climbing section P1 is higher than the height of the starting end.

The smoke exhaust channel P of the battery system of the present disclosure includes one or more climbing sections P1. The height of the terminal end of the climbing section P1 is higher than the height of the starting end. After the thermal runaway occurs in battery B, the smoke discharged from the first pressure relief mechanism 20A When the flue gas passes through the climbing section P1, during the climbing process, the potential energy of the flue gas increases, and the kinetic energy and internal energy decrease, which is conducive to reducing the temperature of the flue gas, and the electrolyte vapor is easier to achieve cooling and condensation, and is prone to thermal runaway under the action of gravity. The remaining gases in the generated combustible gas are separated, so that the flue gas discharged from the flue gas discharge channel P contains less electrolyte vapor, thereby helping to reduce safety hazards.

The climbing section P1 can be formed by the structure of the battery B itself. For example, the climbing section P1 can be provided inside the battery B with a horizontal bottom surface. It can also be formed by the connection relationship between the battery B and other components of the battery system, for example, as shown in Figure 4 to Figure 7. As shown in Figures 9 and 11, it is formed by the acute angle between the bottom surface of battery B and the mounting platform 8. It can also be formed by other components of the battery system or the combination of other components and the box. For example, as shown in Figure 12, it is formed by the battery system. The mounting part flue wall 9 of the battery mounting part M is formed. Of course, when there are multiple climbing sections P1 in the smoke emission channel P, the different climbing sections P1 can be formed by the structure of the battery B itself, by the connection relationship between the battery B and other components of the battery system, or by the battery system. Formed by other components, different climbing sections P1 can also be formed by the above three formation methods, or by any two of the above three formation methods.

In the battery system of some embodiments, as shown in FIGS. 4 to 9 , 11 and 12 , at least one climbing section P1 is configured such that the flue gas in it flows upward obliquely relative to the horizontal direction.

At least one climbing section P1 is configured so that the flue gas in the climbing section P1 flows upward obliquely relative to the horizontal direction, so that the climbing section P1 has a longer flow path within a certain climbing height, which is conducive to lowering the temperature of the flue gas and further separating the electrolyte. full.

In the battery system of some embodiments, as shown in Figures 4 to 9 and 11, at least one climbing section P1 is located inside the box 1; and/or, as shown in Figure 12, at least one climbing section P1 is located inside the box 1 1Exterior.

The climbing section P1 can be arranged inside the box 1 of battery B, or can be arranged outside the box 1 of battery B, or the climbing section P1 can be arranged both inside and outside the box 1 of battery B, which is convenient according to the installation environment of the battery system. Set the climbing section P1 in a flexible way according to the usage environment.

In the battery system of some embodiments, as shown in FIGS. 4 to 9 , 11 and 12 , at least one climbing section P1 extends from one end to the other of two opposite ends of the battery B.

The climbing section P1 extends from one end to the other of the two opposite ends of the battery B, which is conducive to making the climbing section P1 have a certain length, which is conducive to fully cooling the flue gas and separating the electrolyte, and is conducive to reducing safety hazards.

In the battery system of some embodiments, at least two of the multiple climbing sections P1 have the same angle with the horizontal plane; and/or, as shown in Figure 7 and Figure 12, at least two of the multiple climbing sections P1 The angles between the two climbing sections P1 and the horizontal plane are different.

At least two of the multiple climbing sections P1 have the same angle with the horizontal plane and/or at least two of the multiple climbing sections P1 have different angles with the horizontal plane, which is conducive to full and reasonable use of battery B. The structure and/or the structure and space of the battery system should reasonably set the number, position and angle of the climbing section P1, so as to facilitate the full cooling of the flue gas and the separation of the electrolyte.

In the battery system of some embodiments, as shown in Figures 7 and 12, at least two of the multiple climbing sections P1 are arranged adjacently; and/or, as shown in Figure 12, at least two of the multiple climbing sections P1 At least two climbing sections P1 are set apart.

At least two climbing sections P1 among the multiple climbing sections P1 are arranged adjacently; and/or at least two climbing sections P1 among the multiple climbing sections P1 are arranged at intervals, which is conducive to full and reasonable utilization of the structure of the battery B itself and/or The structure and space of the battery system should reasonably set the number, position and angle of the climbing section P1, so as to facilitate the full cooling of the flue gas and the separation of the electrolyte.

The flue gas discharge channel P may only include one or more climbing sections P1, or may include discharge sections other than the climbing section P1. As shown in Figures 9 and 11, it may include one or more descending sections P2; and/or, As shown in Figure 12, one or more horizontal sections P3 may be included. The flue gas emission channel P includes other emission sections other than the climbing section P1, which is conducive to increasing the length of the flue gas emission channel P. The flue gas is deflected at the junction of the climbing section and other emission sections, thereby helping to reduce the flue gas temperature. The electrolyte is separated from the flue gas, thereby helping to reduce safety hazards.

In the battery system of some embodiments, as shown in FIG. 4 , at least one climbing section P1 is formed by the box 1 and the battery pack 2 including a plurality of battery cells 20 .

At least one climbing section P1 is formed by the box 1 and the battery pack 2 including a plurality of battery cells 20, which is conducive to increasing the cross-sectional area of the flue gas discharge channel P as much as possible, reducing the flue gas pressure, making it easier for the electrolyte to condense and interact with heat. The remaining gases in the combustible gas produced out of control are more fully separated, thus helping to reduce safety hazards.

In the battery system of some embodiments, as shown in FIGS. 5 to 8 , battery B includes a thermal management component 3 disposed in the box 1 , and at least part of the smoke exhaust channel P is formed by the thermal management component 3 and the box 1 .

At least part of the flue gas discharge channel P is formed by the thermal management component 3 and the box 1, which is conducive to the temperature of the combustible gas generated by the thermal runaway being reduced under the action of the thermal management component 3, making the electrolyte easier to condense and interacting with the combustible gas generated by the thermal runaway. The remaining gases in the body are more fully separated, which helps reduce safety risks.

In the battery system of some embodiments, battery B includes a thermal management component 3 disposed in the box 1. As shown in Figures 5 and 7, at least one climbing section P1 is located on the thermal management component 3 away from the battery cells 20. One side is located between the thermal management component 3 and the box 1; or as shown in FIG. 6, the climbing section P1 and the thermal management component 3 are respectively located at opposite ends of the battery cell 20.

At least one climbing section P1 is located on the side of the thermal management component 3 away from the battery cell 20 and between the thermal management component 3 and the box 1, which facilitates the combustible gas generated by thermal runaway to escape from the thermal management component at the same time or before and after climbing. 3, the temperature is lowered under the action of 3, making the electrolyte easier to condense and more fully separated from the remaining gases in the combustible gas body generated by thermal runaway, thus helping to reduce safety hazards.

Locating the climbing section P1 and the thermal management component 3 at opposite ends of the battery cell 20 facilitates the installation of the climbing section P1 and the thermal management component 3 respectively, so that the arrangement of the two is not affected by the other.

In the battery system of some embodiments, as shown in Figures 5, 7 to 8, the thermal management component 3 is located below the battery cell 20, and at least one climbing section P1 is located below the thermal management component 3. The thermal management component 3 may be, for example, a heat exchange plate with a medium channel inside. For example, a heat exchange medium, such as water, can be introduced into the medium channel.

Locating the thermal management component 3 below the battery cell 20 and locating at least one climbing section P1 below the thermal management component 3 facilitates the separation of the battery cell 20 and the combustible gas generated by thermal runaway through the thermal management component 3, thereby reducing the risk of thermal runaway. The impact of combustible gas on the battery cells 20, and the thermal management component 3 can cool the flue gas, lower the temperature of the flue gas, make the electrolyte more likely to condense, and more fully separate from the remaining gases in the combustible gas body generated by thermal runaway, thereby helping to reduce Security risks.

In the battery system of some embodiments, as shown in FIGS. 7 and 8 , battery B includes a nozzle 5 configured to inject the heat exchange medium into the flue gas discharge channel P. The heat exchange medium is water.

In the battery system of some embodiments, as shown in Figures 7 and 8, the nozzle 5 is configured to inject the heat exchange medium to at least one climbing section P1.

Injecting the heat exchange medium into the climbing section P1 will help more electrolyte and other gases separate under the action of gravity, which will help reduce safety risks.

In the battery system of some embodiments, as shown in FIGS. 4 and 12 , at least one climbing section P1 is located above the battery cell 20 ; or, as shown in FIGS. 5 to 9 and 11 , at least one climbing section P1 is located above the battery cell 20 . Below the battery cell 20 . Of course, in an embodiment not shown in the figure, the smoke exhaust channel P of the battery system may include both a climbing section P1 located below the battery cell 20 and a climbing section P1 located above the battery cell 20 .

The climbing section P1 can be arranged above the battery cell 20, or can be arranged below the battery cell 20, or the climbing section P1 is provided both above and below the battery cell 20, which facilitates flexible arrangement of the climbing section according to the internal structure of the battery B. P1.

In the battery system of some embodiments, battery B includes a second pressure relief mechanism 1A. The second pressure relief mechanism 1A is provided on the box 1 and is located upstream or at the end of the smoke exhaust channel P. In the embodiment shown in FIGS. 4 to 11 , the second pressure relief mechanism 1A is located at the end of the smoke discharge channel P, and the smoke is discharged from the battery system through the second pressure relief mechanism 1A. As shown in the embodiment shown in Figure 12, the second pressure relief mechanism 1A is located upstream of the end of the smoke discharge channel P. After the smoke passes through the second pressure relief mechanism 1A, it continues to flow in the remaining smoke discharge channel P and then is discharged from the battery system. .

A part of the smoke discharge channel P can be set up after the second pressure relief mechanism 1A, that is, the second pressure relief mechanism 1A is located upstream of the end of the smoke discharge channel P, or the second pressure relief mechanism 1A can be used as the end of the smoke discharge channel P. , this setting makes the position and length of the flue gas emission channel P more flexible, which is beneficial to reducing the temperature of the flue gas to below the specified temperature and the content of the electrolyte in the flue gas to lowering to the specified content before being discharged to the outside, thereby helping to reduce safety hazards.

In the battery system of some embodiments, as shown in Figures 9 to 11, the battery system includes: at least one layered plate 6, the layered plate 6 is configured to layer and form the smoke exhaust channel P in the up and down direction. A multi-layer baffle flow channel; and/or at least one baffle 7. The baffle 7 is provided in the flue gas discharge channel P and is configured to layer the flue gas discharge channel P in the horizontal direction and form a multi-layer baffle. Flow channel.

The stratified plate 6 is provided to layer the flue gas discharge channel P in the up and down direction and form a multi-layer baffle flow channel, and the baffle plate 7 is provided in the flue gas discharge channel P. On the one hand, the flow path of the flue gas can be extended. , and can cool the flowing flue gas. On the other hand, the centrifugal force during the deflection of the flue gas can be used to assist in separating the electrolyte and other gases, so that the electrolyte is more fully separated from the remaining gases in the combustible gas produced by thermal runaway, which is beneficial to reducing the Security risks.

In the embodiment shown in FIGS. 9 to 11 , only one layered board 6 is included. In an embodiment not shown, two or more layered boards 6 may also be provided.

In the battery system of some embodiments, as shown in Figures 9 to 11, at least part of the baffle 7 is disposed in the climbing section P1.

The baffle 7 is provided in the climbing section P1 to help the flue gas lower its temperature while climbing and extend the climbing path, thereby helping to lower the flue gas temperature and making it easier for the electrolyte to condense and interact with the remaining gases in the combustible gas body generated by thermal runaway. The separation is more complete, thus helping to reduce safety hazards.

In the embodiment shown in FIGS. 9 to 11 , the baffles 7 are disposed in the climbing section P1. However, in the embodiment not shown, the baffles 7 can also be disposed in other parts of the flue gas discharge channel P. Within the discharge section, such as the horizontal section and/or the descending section.

In the battery system of some embodiments, as shown in FIGS. 9 to 10 , at least part of the baffle 7 is configured to cause the gas in the smoke discharge channel P to reciprocally deflect in a direction parallel to the bottom surface of the box 1 ; and/or, as shown in FIG. 11 , at least part of the baffle 7 is configured to reciprocate the gas in the flue gas discharge channel P in a direction perpendicular to the bottom surface of the box 1 .

The arrangement of the above baffles 7 in the flue gas discharge channel P makes the flow path of the flue gas more flexible, which is conducive to extending the flow path of the flue gas and making the flue gas baffle obvious, thereby facilitating the use of centrifugal force to separate the electrolyte and other gases. , so that the electrolyte can be more fully separated from the remaining gases in the combustible gas body generated by thermal runaway, thus helping to reduce safety hazards.

In the battery system of some embodiments, as shown in Figure 12, at least one climbing section P1 includes a diverging flow channel with a gradually increasing flow area along the direction of flue gas flow.

The climbing section P1 includes an expanded flow channel with a gradually increasing flow area along the direction of flue gas flow, which can gradually reduce the pressure and flow rate of the flue gas during the flow process. The electrolyte is more likely to condense and separate from the rest of the gas, thereby helping to reduce safety. Hidden danger.

In the battery system of some embodiments, at least one climbing section P1 includes at least one wall with an angle between 5° and 60° with the horizontal plane.

Reasonably setting the angle between the wall of the climbing section P1 and the horizontal plane will help ensure that a certain climbing length of the climbing section corresponds to a certain climbing height, which will help reduce the temperature of the flue gas and make the electrolyte separation more complete. The angle between at least one wall surface of at least one climbing section P1 and the horizontal plane may be, for example, 6°, 10°, 20°, 30°, 45°, 55°, etc.

In the battery system of some embodiments, as shown in FIGS. 4 to 9 , 11 and 12 , the battery system includes a battery mounting part M, the battery mounting part M includes a mounting platform 8 , and the battery B is mounted on the mounting platform 8 .

Battery B is installed on the installation platform 8. The working position of battery B is stable, which is conducive to the stable position of the flue gas discharge channel P, which is conducive to the climbing section P1 to maintain its direction, and is conducive to the climbing section P1 to function stably during flue gas discharge. This will help reduce safety risks.

In the battery system of some embodiments, as shown in FIGS. 4 to 9 and 11 , the bottom surface of battery B is arranged on the mounting platform 8 with an inclination relative to the horizontal plane.

By arranging the bottom surface of battery B on the mounting platform 8 at an angle relative to the horizontal plane, the flue gas discharge flow channel inside battery B that is parallel to the bottom surface of battery B can form a climbing section P1 without the need to modify the internal structure of battery B, that is, The flue gas discharge flow path can include a climbing section P1.

In the battery system of some embodiments, the angle between the bottom surface of battery B and the horizontal plane is 5° to 60°.

Making the angle between the bottom surface of battery B and the horizontal plane is 5° to 60°, which will help ensure that a certain climbing length of climbing section P1 corresponds to a certain climbing height, which will help reduce the temperature of the flue gas and make the electrolyte more fully separated. The angle between the bottom surface of battery B and the horizontal plane may be, for example, 8°, 12°, 22°, 30°, 40°, 50°, etc.

In the battery system of some embodiments, as shown in Figure 12, the battery mounting part M includes a mounting part flue wall 9 disposed on the mounting platform 8, and at least one climbing section P1 is formed by the mounting part flue wall 9 or by the mounting part. The lower flue wall 9 and the box body 1 are formed together.

The climbing section P1 is set outside the box 1 through the installation flue wall 9. When the same climbing height requirement is achieved, no or less climbing section P1 can be set inside the battery B, thereby reducing or eliminating the need for battery B. The modification of the internal structure; it is also possible to set the length of the flue gas emission channel P and the length and climbing height of the climbing section P1 according to the gas emission needs after thermal runaway without being restricted by the structure of the battery B, making it easier to meet the flue gas treatment needs.

In the battery system of some embodiments, as shown in Figure 12, the battery installation part M includes a third pressure relief mechanism 9A. The third pressure relief mechanism 9A is provided on the flue wall 9 of the installation part and is located in the smoke exhaust channel P. end.

By arranging the third pressure relief mechanism 9A at the end of the flue gas discharge channel P, the flow rate and pressure of the gas discharged from the flue gas discharge channel P can be controlled to a certain extent, which is beneficial to reducing potential safety hazards.

In the battery system of some embodiments, as shown in FIG. 8 , the pressure relief port of the first pressure relief mechanism 20A faces the smoke discharge channel P to discharge gas directly into the smoke discharge channel P.

The pressure relief port of the first pressure relief mechanism 20A faces the flue gas discharge channel P, so that the combustible gas generated by thermal runaway is discharged from the pressure relief port of the first pressure relief mechanism 20A and immediately filled into the flue gas discharge channel P, and then passes through the flue gas. The discharge channel P is diverted and discharged from the battery system after treatment, which can reduce the impact of combustible gas generated by thermal runaway on the battery cells 20 that have not experienced thermal runaway.

An embodiment of the present disclosure also provides an electrical device, including the battery system of the aforementioned embodiment, and the battery system is used to supply power to the electrical device.

An embodiment of the present disclosure also provides an energy storage device, including the battery system of the aforementioned embodiment. The energy storage device uses battery B of the battery system as an energy storage carrier.

The battery system of each embodiment of the present disclosure will be described in detail below with reference to FIGS. 4 to 12 .

FIG. 4 is a schematic structural diagram of a battery system according to an embodiment of the present disclosure.

As shown in FIG. 4 , the battery system includes a battery B and a battery mounting part M.

Battery B includes a case 1 and a battery pack 2 installed in the case 1 . The battery pack 2 includes a plurality of battery cells 20 arranged side by side. 2 , the battery cell 20 includes a cell casing composed of a casing 25 and an end cover 211, a battery core located in the cell casing, and a first pressure relief mechanism 20A provided on the cell casing. The cell includes two electrode assemblies 24 .

The battery mounting part M includes a mounting platform 8 on which the battery B is mounted. In this embodiment, the upper surface of the mounting platform 8 is horizontal. The bottom surface of the battery B, that is, the bottom surface of the box 1, is arranged on the mounting platform 8 at an angle relative to the upper surface of the mounting platform 8, that is, relative to the horizontal plane. The connection and fixation between battery B and the installation platform 8 can be through threaded connectors, clamping, riveting, welding, etc. The embodiments of the present disclosure relate to the connection between battery B and the installation platform 8, and the connection methods of the two are not the same. Make limitations.

As shown in FIG. 4 , the battery system includes a flue gas discharge channel P. The flue gas discharge channel P is configured so that the gas in the unit housing discharged from the first pressure relief mechanism 20A flows along the flue gas discharge channel. P drain the battery system. The flue gas discharge channel P includes a climbing section P1, and the height of the terminal end (right end in Figure 4) of the climbing section P1 is higher than the height of the starting end (left end in Figure 4). The climbing section P1 is configured so that the flue gas in the climbing section P1 flows upward obliquely with respect to the horizontal direction.

In this embodiment, the climbing section P1 is formed by the connection relationship between battery B and other components of the battery system. As shown in FIG. 4 , it is formed by forming an acute angle between the bottom surface of battery B and the mounting platform 8 . In the battery system of the embodiment of the present disclosure, the angle between the bottom surface of battery B and the horizontal plane is 7°. The entire box 1 of battery B is square, so that the angles between the top surface of the battery pack 2 and the top wall of the box 1 and the horizontal plane are both 7°.

The climbing section P1 is located inside the box 1 and above the battery cells 20 , extending from one end (the left end in Figure 4 ) to the other end (the right end in Figure 4 ) of the two opposite ends of the battery B.

As shown in FIG. 4 , battery B includes a second pressure relief mechanism 1A. The second pressure relief mechanism 1A is provided on the box 1 . In FIG. 4 , it is located above the right side wall of the box 1 . The second pressure relief mechanism 1A is located at the end of the smoke discharge channel P, and the smoke is discharged from the battery system through the second pressure relief mechanism 1A.

In this embodiment, the pressure relief port of the first pressure relief mechanism 20A of each battery cell 20 faces the smoke discharge channel P to discharge gas directly into the smoke discharge channel P. Corresponding to the embodiment shown in FIG. 4 , the pressure relief port of the first pressure relief mechanism 20A of each battery cell 20 faces upward. Once a certain battery cell 20 experiences thermal runaway, the first pressure relief port of the battery cell 20 will The mechanism 20A directly discharges the high-temperature and high-pressure gas in the single shell to the flue gas discharge channel P. After the high-temperature and high-pressure gas is discharged into the flue gas discharge channel P, it quickly fills the entire flue gas discharge channel P. When the pressure in the flue gas discharge channel P When the working pressure is greater than the working pressure of the second pressure relief mechanism 1A, the flue gas is discharged from the pressure relief port of the second pressure relief mechanism 1A. During the process of the flue gas flowing in the flue gas discharge channel P, in this embodiment, that is, the climbing section P1, the temperature decreases, and the electrolyte mixed in the flue gas condenses and is better separated under the action of gravity, thus, from the first The smoke discharged from the pressure relief port of the second pressure relief mechanism 1A reduces the safety hazard compared with related technologies.

The battery system of this embodiment can be installed on electrical equipment as a power battery system, or can also be installed on energy storage equipment as a battery energy storage system.

FIG. 5 is a schematic structural diagram of a battery system according to an embodiment of the present disclosure. Only the differences between the embodiment shown in FIG. 5 and the embodiment shown in FIG. 4 will be described below. For unexplained parts, reference may be made to the relevant descriptions of the foregoing embodiments.

The climbing section P1 is formed by forming an acute angle between the bottom surface of the battery B and the mounting platform 8 . The angle between the bottom surface of battery B and the horizontal plane is 10°.

As shown in Figure 5, the flue gas discharge channel P includes a climbing section P1. The height of the terminal end (right end in Figure 5) of the climbing section P1 is higher than the height of the starting end (left end in Figure 5). The climbing section P1 is configured so that the flue gas in the climbing section P1 flows upward obliquely with respect to the horizontal direction. The climbing section P1 is located inside the box 1 and below the battery cell 20 , extending from one end (the left end in Figure 5 ) to the other end (the right end in Figure 5 ) of the two opposite ends of the battery B.

As shown in FIG. 5 , the second pressure relief mechanism 1A is provided on the box 1 . In Figure 5, it is located below the right side wall of box 1. The second pressure relief mechanism 1A is located at the end of the smoke discharge channel P, and the smoke is discharged from the battery system through the second pressure relief mechanism 1A.

As shown in FIG. 5 , a thermal management component 3 is provided below the battery pack 2 and spaced apart from the bottom wall of the box 1 . The thermal management component 3 is a heat exchange plate with a medium channel inside. In this embodiment, the climbing section P1 is located on the side of the thermal management component 3 away from the battery cell 20 and between the thermal management component 3 and the box 1 . As shown in FIG. 5 , the climbing section P1 is located below the thermal management component 3 . The space formed by the thermal management component 3 and the box 1 forms an air collecting chamber. In this embodiment, the air collecting chamber is also the flue gas discharge channel P and its climbing section P1. The heat exchange medium can be introduced into the interior of the thermal management component 3 . The heat exchange medium is water, for example.

In this embodiment, the first pressure relief mechanism 20A of each battery cell 20 is disposed at the bottom of the cell casing, and the pressure relief port faces the smoke exhaust channel P to discharge gas directly into the smoke exhaust channel P. The plate portion of the thermal management component 3 opposite to each pressure relief port is provided with openings to avoid the pressure relief ports. Corresponding to the embodiment shown in FIG. 5 , the pressure relief port of the first pressure relief mechanism 20A of each battery cell 20 is directed downward. Once a certain battery cell 20 undergoes thermal runaway, the first pressure relief port of the battery cell 20 will The mechanism 20A directly discharges the high-temperature and high-pressure gas in the single shell to the flue gas discharge channel P. After the high-temperature and high-pressure gas is discharged into the flue gas discharge channel P, it quickly fills the entire flue gas discharge channel P. When the pressure in the flue gas discharge channel P When the working pressure is greater than the working pressure of the second pressure relief mechanism 1A, the flue gas is discharged from the pressure relief port of the second pressure relief mechanism 1A. When the flue gas enters the flue gas discharge channel P and flows in the climbing section P1 of the flue gas discharge channel P, the temperature decreases due to the cooling effect, pressure reduction and potential energy increase of the thermal management component 3, and the electrolyte mixed in the flue gas The condensation is better separated under the action of gravity, thereby reducing the safety risks of the flue gas discharged from the pressure relief port of the second pressure relief mechanism 1A relative to the related technology.

FIG. 6 is a schematic structural diagram of a battery system according to an embodiment of the present disclosure. Only the differences between the embodiment shown in FIG. 6 and the embodiment shown in FIG. 5 will be described below. For unexplained parts, reference may be made to the relevant descriptions of the foregoing embodiments.

As shown in Figure 6, the climbing section P1 is formed by forming an acute angle between the bottom surface of the battery B and the mounting platform 8. The angle between the bottom surface of battery B and the horizontal plane is 12°.

As shown in Figure 6, the flue gas discharge channel P includes a climbing section P1. The height of the terminal end (right end in Figure 6) of the climbing section P1 is higher than the height of the starting end (left end in Figure 6). The climbing section P1 is configured so that the flue gas in the climbing section P1 flows upward obliquely with respect to the horizontal direction. The climbing section P1 is located inside the box 1 and above the battery cells 20, and extends from one end (the left end in Figure 6) of the two opposite ends of the battery B (the right end in Figure 6) to the other end (the right end in Figure 6).

The climbing section P1 and the thermal management component 3 are respectively located at opposite ends of the battery cell 20 . In this embodiment, the thermal management component 3 is disposed at the bottom of the battery pack 2 . A partition plate 4 is provided at the top of the battery pack 2, and the partition plate 4 is spaced apart from the top wall of the box 1. The space formed by the partition plate 4 and the upper part of the box wall of the box 1 forms an air collecting chamber, which is also the smoke discharge channel P and its climbing section P1.

As shown in FIG. 6 , the second pressure relief mechanism 1A is provided on the box 1 . In Figure 6, it is located above the right side wall of box 1. The second pressure relief mechanism 1A is located at the end of the smoke discharge channel P, and the smoke is discharged from the battery system through the second pressure relief mechanism 1A.

In this embodiment, the first pressure relief mechanism 20A of each battery cell 20 is disposed on the top of the cell casing, and the pressure relief port faces the smoke exhaust channel P to discharge gas directly into the smoke exhaust channel P. The plate body portion of the partition plate 4 opposite to each pressure relief port is provided with openings to avoid the pressure relief ports. Corresponding to the embodiment shown in FIG. 6 , the pressure relief port of the first pressure relief mechanism 20A of each battery cell 20 faces upward. Once a certain battery cell 20 experiences thermal runaway, the first pressure relief port of the battery cell 20 will The mechanism 20A directly discharges the high-temperature and high-pressure gas in the single shell to the flue gas discharge channel P. After the high-temperature and high-pressure gas is discharged into the flue gas discharge channel P, it quickly fills the entire flue gas discharge channel P. When the pressure in the flue gas discharge channel P When the working pressure is greater than the working pressure of the second pressure relief mechanism 1A, the flue gas is discharged from the pressure relief port of the second pressure relief mechanism 1A. During the flow of flue gas in the climbing section P1 of the flue gas discharge channel P, the temperature decreases, and the electrolyte mixed in the flue gas condenses and is better separated under the action of gravity, thus, from the second pressure relief mechanism 1A The smoke discharged from the pressure relief port reduces the safety hazard compared to related technologies.

FIG. 7 is a schematic cross-sectional structural diagram of a battery system according to an embodiment of the present disclosure. FIG. 8 is a partially enlarged structural schematic diagram of the battery system according to the embodiment shown in FIG. 7 . Only the differences between the embodiment shown in FIG. 7 and FIG. 8 and the embodiment shown in FIG. 5 will be described below. For unexplained parts, reference may be made to the relevant descriptions of the foregoing embodiments.

As shown in Figure 7, the climbing section P1 is formed by forming an acute angle between the bottom surface of the battery B and the mounting platform 8. The angle between the bottom surface of battery B and the horizontal plane is 10.

As shown in Figure 7, the flue gas discharge channel P includes two climbing sections P1. A climbing section P1 (hereinafter referred to as the bottom climbing section) is located below the battery cell 20 of the battery pack 2. The height of the terminal end (right end in Figure 7) of the bottom climbing section is higher than the height of the starting end (left end in Figure 7). Another climbing section P1 (hereinafter referred to as the side climbing section) is located on the side of the battery cell 20 of the battery pack 2 (right side in Figure 7), and the height of the terminal end of the side climbing section (middle right side in Figure 7) The height higher than the starting end (lower end on the right in Figure 7). The bottom climbing section extends from one end (the left end in Figure 7) to the other end (the right end in Figure 7) of the two opposite ends of the battery B. Both the bottom climbing section P1 and the side climbing section are configured so that the flue gas in them flows upward obliquely with respect to the horizontal direction. Both the bottom climbing section and the side climbing section are located inside the box 1 .

As shown in FIG. 7 , the second pressure relief mechanism 1A is provided on the box 1 . In Figure 7, it is located in the middle of the right side wall of box 1. The second pressure relief mechanism 1A is located at the end of the smoke discharge channel P, and the smoke is discharged from the battery system through the second pressure relief mechanism 1A.

As shown in FIG. 7 , a thermal management component 3 is provided below the battery pack 2 and spaced apart from the bottom wall of the box 1 . In this embodiment, the bottom climbing section is located on the side of the thermal management component 3 away from the battery cell 20 and between the thermal management component 3 and the box 1 . The space formed by the thermal management component 3 and the box 1 forms an air collecting chamber, which is also a part of the flue gas discharge channel P and its bottom climbing section.

The side climbing section is located on the right side of the box 1, and the starting end of the side climbing section is connected and connected with the ending end of the bottom climbing end.

As shown in Figures 7 and 8, battery B includes a nozzle 5 configured to inject the heat exchange medium into the flue gas discharge channel P. As shown in the embodiment shown in Figures 7 and 8, the nozzle 5 is arranged in the gas collecting chamber near the right end of the box, and is configured to inject the heat exchange medium to the bottom climbing section.

In this embodiment, the first heat exchange medium W1, such as water, flows into the internal flow channel of the thermal management component 3, and the second heat exchange medium W2, such as water, flows into the pipe connected to the nozzle 5. The first heat exchange medium W1 and the third heat exchange medium The two heat exchange media W2 are controlled independently of each other.

In this embodiment, the first pressure relief mechanism 20A of each battery cell 20 is disposed at the bottom of the cell casing, and the pressure relief port climbs toward the bottom section of the smoke exhaust channel P to discharge gas directly into the smoke exhaust channel P. The plate portion of the thermal management component 3 opposite to each pressure relief port is provided with openings to avoid the pressure relief ports. Corresponding to the embodiment shown in FIGS. 7 and 8 , the pressure relief port of the first pressure relief mechanism 20A of each battery cell 20 is directed downward. Once a certain battery cell 20 undergoes thermal runaway, the first pressure relief port of the battery cell 20 will be released. A pressure relief mechanism 20A directly releases the high-temperature and high-pressure gas in the single shell to the bottom climbing section. After the high-temperature and high-pressure gas is discharged into the bottom climbing section, it quickly fills the entire flue gas discharge channel P. When the pressure in the flue gas discharge channel P is greater than When the working pressure of the second pressure relief mechanism 1A is high, the flue gas is discharged from the pressure relief port of the second pressure relief mechanism 1A. When the flue gas flows in the bottom climbing section and the side climbing section of the flue gas discharge channel P, the temperature decreases due to the decrease in pressure, the cooling effect of the thermal management component 3 and the increase in potential energy, and the electrolyte mixed in the flue gas condenses. It is better separated under the action of gravity. Since the flue gas discharge channel includes a side climbing section, the flue gas temperature can be more fully reduced and the electrolyte can be separated. Therefore, the safety hazard of the smoke discharged from the pressure relief port of the second pressure relief mechanism 1A is further reduced. In addition, the second heat exchange medium W2 can be sprayed into the flue gas discharge channel P through the nozzle 5 as needed to further reduce the flue gas temperature and more electrolyte is separated from the flue gas, thereby reducing the safety risks of the flue gas. Low.

FIG. 9 is a schematic diagram of the principle structure of a battery system according to an embodiment of the present disclosure; FIG. 10 is a schematic diagram of the exhaust path of a flue gas discharge channel including a baffle according to the embodiment shown in FIG. 9 . Only the differences between the embodiment shown in FIG. 9 and FIG. 10 and the embodiment shown in FIG. 5 will be described below. For unexplained parts, reference may be made to the relevant descriptions of the foregoing embodiments.

As shown in Figure 7, the climbing section P1 is formed by forming an acute angle between the bottom surface of the battery B and the mounting platform 8. The angle between the bottom surface of battery B and the horizontal plane is 5°.

As shown in Figure 9, the flue gas discharge channel P includes a climbing section P1 and two descending sections P2.

In this embodiment, a partition plate 4 is provided below the battery pack 2 and separated from the bottom wall of the box 1 . The partition plate 4 and the lower wall of the box 1 form a gas collecting chamber.

Battery B also includes a layered plate 6 and a plurality of baffles 7 . The layered plate 6 and the baffle plate 7 are both located in the air collection chamber. The layered plate 6 is configured to layer the flue gas discharge channel P in the up and down direction and form a multi-layer baffle flow channel. The baffle 7 is disposed in the flue gas discharge channel P and is configured to layer the flue gas discharge channel P in the horizontal direction and form a multi-layer baffle flow channel.

As shown in FIG. 9 , the layered plate 6 is arranged in the air collection chamber. Three ends of the layered plate are airtightly connected to the side wall of the box 1 , and one end is spaced apart from the side wall of the box 1 . In this embodiment, the layered plate 6 is arranged parallel to the bottom wall of the box 1 and the partition plate 4. The three ends of the layered plate 6 and the side wall of the box 1 are airtightly connected as shown in Figure 9. The front end, rear end and right end of , and the end spaced from the side wall of the box 1 is the right end shown in Figure 9. The layered plate 6 divides the gas collection bin into two layers of flue gas emission channels arranged at the upper and lower levels. The part of the flue gas emission channel P located on the upper layer forms a descending section P2 (hereinafter referred to as the upper layer descending section). The one on the right connects the upper and lower layers. The flue gas emission channel part of the two-layer flue gas emission channel part forms a descending section P2 (hereinafter referred to as the side descending section), and the flue gas emission part located on the lower layer constitutes a climbing section P1.

The climbing section P1 is located inside the box 1 and below the battery cells 20 of the battery pack 2. The height of the terminal end (right end in Figure 9) of the climbing section P1 is higher than the height of the starting end (left end in Figure 9). The climbing section P1 extends from one end (the left end in Figure 9 ) to the other end (the right end in Figure 9 ) of the two opposite ends of the battery B, and is configured so that the smoke in it flows upward obliquely with respect to the horizontal direction.

As shown in FIG. 9 , the second pressure relief mechanism 1A is provided on the box 1 . In Figure 9, it is located at the lower part of the right side wall of box 1. The second pressure relief mechanism 1A is located at the end of the smoke discharge channel P, and the smoke is discharged from the battery system through the second pressure relief mechanism 1A.

As shown in FIG. 9 , a plurality of baffles 7 are arranged in parallel and spaced apart in the climbing section P1 and are configured to cause the gas in the flue gas discharge channel P to reciprocate in a direction parallel to the bottom surface of the box 1 . As shown in Figures 9 and 10, the baffles 7 of the two installation methods are arranged alternately. The first type of baffle 7 is airtightly connected to the rear side wall, bottom wall and partition plate 4 of the box 1 and is spaced apart from the front side wall of the box 1. The second type of baffle 7 is connected to the front side wall of the box 1. The side walls, the bottom wall and the partition plate 4 are airtightly connected and spaced apart from the rear side wall of the box 1, so that the multiple baffles 7 allow the gas entering the climbing section P1 to follow the baffle flow path shown in Figure 10 It flows and climbs from the starting end to the ending end, and is finally discharged from the battery system through the pressure relief port of the second pressure relief mechanism 1A.

In this embodiment, the first pressure relief mechanism 20A of each battery cell 20 is disposed at the bottom of the cell casing, and the pressure relief port faces the upper descending section of the smoke exhaust channel P to discharge gas directly into the smoke exhaust channel P. The plate body portion of the partition plate 4 opposite to each pressure relief port is provided with openings to avoid the pressure relief ports. Corresponding to the embodiment shown in FIGS. 9 and 10 , the pressure relief port of the first pressure relief mechanism 20A of each battery cell 20 is directed downward. Once a certain battery cell 20 undergoes thermal runaway, the first pressure relief port of the battery cell 20 will be released. A pressure relief mechanism 20A directly releases the high-temperature and high-pressure gas in the single shell to the upper descending section. After the high-temperature and high-pressure gas is discharged into the upper descending section, it quickly fills the entire flue gas discharge channel P. When the pressure in the flue gas discharge channel P is greater than When the working pressure of the second pressure relief mechanism 1A is high, the flue gas is discharged from the pressure relief port of the second pressure relief mechanism 1A. The flue gas flows through the upper descending section, the side descending section and the climbing section P1 successively in the flue gas discharge channel P. When flowing in the two descending sections P2, the temperature of the flue gas decreases due to expansion into a larger space and contact with the partition plate 4, the box 1 and the layered plate 6, and the electrolyte is partially condensed and separated. In the process of entering the climbing section from the upper descending section, due to the steering of the flue gas, under the combined action of centrifugal force and gravity, the electrolyte initially separates. After entering the climbing section P1, it gradually climbs along the baffle flow channel in the climbing section P1. During the process, the temperature of the flue gas is further reduced, and the electrolyte mixed in the flue gas condenses more and is better separated under the action of gravity and the centrifugal force of the flue gas turning. Therefore, the safety hazard of the smoke discharged from the pressure relief port of the second pressure relief mechanism 1A is further reduced.

FIG. 11 is a schematic structural diagram of a battery system according to an embodiment of the present disclosure. Only the differences between the embodiment shown in FIG. 11 and the embodiments shown in FIGS. 9 and 10 will be described below. For unexplained parts, reference may be made to the relevant descriptions of the foregoing embodiments.

As shown in FIG. 11 , a plurality of baffles 7 are configured to reciprocally deflect the gas in the flue gas discharge channel P in a direction perpendicular to the bottom surface of the box 1 . As shown in Figure 11, the baffles 7 of the two installation methods are arranged alternately. The first type of baffle 7 is airtightly connected to the front and rear side walls and bottom wall of the box 1 and is spaced apart from the partition plate 4. The second type of baffle 7 is airtightly connected to the front and rear side walls of the box 1 and the partition plate 4. Closely connected and spaced apart from the bottom side wall of the box 1, the multiple baffles 7 allow the gas entering the climbing section P1 to flow and climb along the baffle flow channel shown in Figure 11 from the starting end to the ending end, and finally The battery system is discharged from the pressure relief port of the second pressure relief mechanism 1A.

In this embodiment, the first pressure relief mechanism 20A of each battery cell 20 is disposed at the bottom of the cell casing, and the pressure relief port faces the upper descending section of the smoke exhaust channel P to discharge gas directly into the smoke exhaust channel P. The plate body portion of the partition plate 4 opposite to each pressure relief port is provided with openings to avoid the pressure relief ports. Corresponding to the embodiment shown in FIG. 11 , the pressure relief port of the first pressure relief mechanism 20A of each battery cell 20 is directed downward. Once a certain battery cell 20 undergoes thermal runaway, the first pressure relief port of the battery cell 20 will The mechanism 20A directly discharges the high-temperature and high-pressure gas in the single shell to the upper descending section. After the high-temperature and high-pressure gas is discharged into the upper descending section, it quickly fills the entire flue gas discharge channel P. When the pressure in the flue gas discharge channel P is greater than the second discharge When the working pressure of the pressure mechanism 1A is reduced, the flue gas is discharged from the pressure relief port of the second pressure relief mechanism 1A. The flue gas flows through the upper descending section, the side descending section and the climbing section P1 successively in the flue gas discharge channel P. When flowing in the two descending sections P2, the temperature of the flue gas decreases due to expansion into a larger space and contact with the partition plate 4, the box 1 and the layered plate 6, and the electrolyte is partially condensed and separated. In the process of entering the climbing section from the upper descending section, due to the steering of the flue gas, under the combined action of centrifugal force and gravity, the electrolyte initially separates. After entering the climbing section P1, it gradually climbs along the baffle flow channel in the climbing section P1. During the process, the temperature of the flue gas is further reduced, and the electrolyte mixed in the flue gas condenses more and is better separated under the action of gravity and the centrifugal force of the flue gas turning. Therefore, the safety hazard of the smoke discharged from the pressure relief port of the second pressure relief mechanism 1A is further reduced.

In this embodiment, the battery system includes battery B and battery mounting part M.

The battery mounting part M includes a mounting platform 8 and a mounting part flue wall 9 .

Battery B is installed on the installation platform 8. The upper surface of the mounting platform 8 is level. The bottom of battery B is also level. As shown in Figure 12, the bottom surface of the box 1 is directly connected to the upper surface of the mounting platform 8. Similar to the previous embodiments, the battery B and the mounting platform 8 may be connected and fixed through threaded connectors, clamping, riveting, welding, etc.

As shown in FIG. 12 , the battery system includes a smoke exhaust channel P configured to discharge the gas in the cell housing discharged from the first pressure relief mechanism 20A out of the battery system along the smoke exhaust channel P.

As shown in Figure 12, the flue gas discharge channel P includes a climbing section P1, and the height of the terminal end (right end in Figure 11) of the climbing section P1 is higher than the height of the starting end (left end in Figure 11). The climbing section P1 is configured so that the flue gas in the climbing section P1 flows upward obliquely with respect to the horizontal direction. In this embodiment, the climbing section P1 is formed by the battery B and the battery mounting component M of the battery system.

As shown in Figure 12, battery B includes a second pressure relief mechanism 1A. The second pressure relief mechanism 1A is provided on the box 1. In Figure 12, it is located above the right side wall of the box 1. The second pressure relief mechanism 1A is located upstream of the end of the flue gas discharge channel P. A partial flue gas discharge channel P is also provided downstream of the second pressure relief mechanism 1A, that is, outside the box 1 .

As shown in Figure 12, the installation part flue wall 9 includes a first wall part 91 that is spaced parallel to the right side wall of the box 1 of the battery B where the second pressure relief mechanism 1A is provided, and a first wall part 91 connected to the box 1. The second wall portion 92 above the left box wall and flush with the left box wall, the third wall portion 93 connected to the top of the first wall portion 91 and the second wall portion are spaced parallel to the top wall of the box body 1 A fourth wall portion is provided, and two fifth wall portions 95 are airtightly connected to the front and rear ends of the first wall portion 91 , the second wall portion 92 , the third wall portion 93 and the fourth wall portion 94 respectively. The fourth wall 94 is located between the top wall of the box 1 and the third wall 93 and is spaced apart from the third wall 93. The right end of the fourth wall 94 is airtightly connected to the first wall 91. There is a gap between the fourth wall portion 94 and the second wall portion 92 .

As shown in FIG. 12 , in the embodiment of the present disclosure, a part of the smoke discharge channel is located inside the box 1 , and the other part of the smoke discharge channel is located outside the box 1 .

The flue gas discharge channel located inside the box 1 is a horizontal section P3, hereinafter referred to as the internal horizontal section. The inner horizontal section is located above the battery cell 20 and extends from one end (the left end in FIG. 12 ) to the other end (the right end in FIG. 12 ) of the two opposite ends of the battery B.

The flue gas discharge channel located outside the box 1 includes a climbing section P1 (hereinafter referred to as the right climbing section) between the box 1 and the first wall 91 in sequence according to the flow direction of the gas. The horizontal section P3 between the fourth wall portions 94 (hereinafter referred to as the outer horizontal section), the climbing section P1 (hereinafter referred to as the left climbing section) located in the interval between the fourth wall section 94 and the second wall section 92 and the third The climbing section P1 between the wall portion 93 and the fourth wall portion 94 (hereinafter referred to as the upper climbing section). The outer horizontal section is located above the battery cell 20 and extends from one end (the right end in FIG. 12 ) to the other end (the left end in FIG. 12 ) of the two opposite ends of the battery B. The upper climbing section is formed by the mounting part flue wall 9, is located above the battery cell 20, and extends from one end (the left end in Figure 12) of the two opposite ends of the battery B to the other end (the right end in Figure 12).

As shown in Figure 12, the upper climbing section includes a diverging flow channel with a gradually increasing flow area along the direction of flue gas flow. The fourth wall portion 94 forming the bottom wall of the upper climbing section is horizontal, and the third wall portion 93 forming the top wall of the upper climbing section is inclined relative to the horizontal plane at an angle of 15° with the horizontal plane.

As shown in Figure 12, the battery installation part M includes a third pressure relief mechanism 9A. The third pressure relief mechanism 9A is provided on the upper part of the first wall part 91 of the installation part flue wall 9 and is located at the end of the flue gas discharge channel P. .

In this embodiment, the pressure relief port of the first pressure relief mechanism 20A of each battery cell 20 faces the inner horizontal section of the smoke discharge channel P, so that the gas can be discharged directly into the smoke discharge channel P. Corresponding to the embodiment shown in FIG. 12 , the pressure relief port of the first pressure relief mechanism 20A of each battery cell 20 faces upward. Once a certain battery cell 20 undergoes thermal runaway, the first pressure relief port of the battery cell 20 will The mechanism 20A directly discharges the high-temperature and high-pressure gas in the unit shell to the internal horizontal section of the flue gas discharge channel P. After the high-temperature and high-pressure gas is discharged into the internal horizontal section of the flue gas discharge channel P, it quickly fills the entire internal horizontal section. When the pressure in the internal horizontal section is greater than the working pressure of the second pressure relief mechanism 1A, the flue gas will be released from the second pressure relief mechanism. The exhaust from the pressure relief port of the mechanism 1A enters and fills the smoke exhaust channel P outside the box 1 . When the flue gas pressure in the flue gas discharge channel P outside the box 1 reaches the working pressure of the third pressure relief mechanism 9A, the flue gas discharge channel P outside the box 1 climbs along the right climbing section, the external horizontal section, and the left side. section and the upper climbing section until the battery system is discharged from the pressure relief port of the third pressure relief mechanism 9A. In this embodiment, the flue gas is first depressurized and cooled in the internal horizontal section, and part of the electrolyte is separated from the flue gas. After the flue gas leaves the box 1 and enters the flue gas discharge channel P outside the box 1, due to the space The expansion and potential energy increase further reduce the pressure and temperature, the electrolyte is more fully condensed, and is fully separated under the action of gravity and the centrifugal force caused by the direction of the flue gas. The flue gas discharged from the pressure relief port of the third pressure relief mechanism 9A is relatively Reduce security risks in related technologies.

While the present disclosure has been described with reference to preferred embodiments, various modifications may be made and equivalents may be substituted for components thereof without departing from the scope of the disclosure. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any way. The present disclosure is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

A battery system includes a battery (B). The battery (B) includes a box (1) and a battery cell (20) arranged in the box (1). The battery cell (20) It includes a single casing, a battery core located in the single casing, and a first pressure relief mechanism (20A) provided on the single casing; wherein,

The battery system includes a smoke discharge channel (P) configured to discharge gas in the cell casing discharged from the first pressure relief mechanism (20A) along the The smoke exhaust channel (P) discharges the battery system;

The flue gas discharge channel (P) includes one or more climbing sections (P1), and the height of the terminal end of the climbing section (P1) is higher than the height of the starting end.
The battery system according to claim 1, wherein at least one of the climbing sections (P1) is configured so that the flue gas in it flows upward obliquely with respect to the horizontal direction.
The battery system according to claim 1 or 2, wherein,

At least one of the climbing sections (P1) is located inside the box (1); and/or

At least one climbing section (P1) is located outside the box (1).
The battery system according to any one of claims 1 to 3, wherein at least one climbing section (P1) extends from one end to the other of two opposite ends of the battery (B).
The battery system according to any one of claims 1 to 4, wherein,

At least two of the plurality of climbing sections (P1) have the same angle with the horizontal plane; and/or

At least two of the plurality of climbing sections (P1) have different angles with the horizontal plane.
The battery system according to any one of claims 1 to 5, wherein,

At least two of the climbing sections (P1) among the plurality of climbing sections (P1) are arranged adjacently; and/or

At least two of the plurality of climbing sections (P1) are arranged at intervals.
The battery system according to any one of claims 1 to 6, wherein at least one of the climbing sections (P1) consists of the box (1) and a battery pack including a plurality of the battery cells (20). (2) Formation.
The battery system according to any one of claims 1 to 7, wherein the battery (B) includes a thermal management component (3) disposed in the box (1), at least part of the smoke exhaust A channel (P) is formed by the thermal management component (3) and the box (1).
The battery system according to any one of claims 1 to 8, wherein the battery (B) includes a thermal management component (3) disposed in the box (1), wherein

At least one of the climbing sections (P1) is located on the side of the thermal management component (3) away from the battery cell (20) and between the thermal management component (3) and the box (1). time; or

At least one of the climbing sections (P1) and the thermal management component (3) are respectively located at opposite ends of the battery cell (20).
The battery system according to claim 8 or 9, wherein the thermal management component (3) is located below the battery cell (20), and at least one of the climbing sections (P1) is located at the thermal management component (3). ) below.
The battery system according to any one of claims 1 to 10, wherein the battery (B) includes a nozzle (5) configured to inject into the smoke exhaust channel (P) heat exchange medium.
The battery system according to claim 11, wherein the nozzle (5) is configured to inject heat exchange medium to at least one of the climbing sections (P1).
The battery system according to any one of claims 1 to 12, wherein

At least one of the climbing sections (P1) is located above the battery cell (20); and/or

At least one of the climbing sections (P1) is located below the battery cell (20).
The battery system according to any one of claims 1 to 13, wherein the battery (B) includes a second pressure relief mechanism (1A), the second pressure relief mechanism (1A) is provided in the box (1), the second pressure relief mechanism (1A) is located upstream or at the end of the flue gas discharge channel (P).
The battery system according to any one of claims 1 to 14, wherein the battery system includes:

At least one layered plate (6) configured to layer the flue gas discharge channel (P) in the up and down direction and form a multi-layer baffle flow channel; and/or

At least one baffle (7) is provided in the flue gas discharge channel (P) and is configured to layer the flue gas discharge channel (P) in the horizontal direction and A multi-layer baffle flow channel is formed.
The battery system according to claim 15, wherein at least part of the baffle (7) is provided in the climbing section (P1).
The battery system according to claim 15 or 16, wherein,

At least part of the baffles (7) is configured to reciprocate the gas in the flue gas discharge channel (P) in a direction parallel to the bottom surface of the box (1); and/or

At least part of the baffles (7) is configured to reciprocate the gas in the flue gas discharge channel (P) in a direction perpendicular to the bottom surface of the box (1).
The battery system according to any one of claims 1 to 17, wherein at least one of the climbing sections (P1) includes a diverging flow channel with a flow area gradually increasing along the flue gas flow direction.
The battery system according to any one of claims 1 to 18, wherein at least one of the climbing sections (P1) includes at least one wall with an angle from the horizontal plane of 5° to 60°.
The battery system according to any one of claims 1 to 19, wherein the battery system includes a battery mounting part (M) including a mounting platform (8), and the battery (B ) is installed on the installation platform (8).
The battery system according to claim 20, wherein the bottom surface of the battery (B) is arranged on the mounting platform (8) with an inclination relative to the horizontal plane.
The battery system according to claim 21, wherein the angle between the bottom surface of the battery (B) and the horizontal plane is 5° to 60°.
The battery system according to any one of claims 20 to 22, wherein the battery mounting part (M) includes a mounting part flue wall (9) disposed on the mounting platform (8), at least one The climbing section (P1) is formed by the installation part flue wall (9) or is formed by the installation part flue wall (9) and the box (1).
The battery system according to claim 23, wherein the battery mounting part (M) includes a third pressure relief mechanism (9A), the third pressure relief mechanism (9A) is disposed on the mounting part flue wall ( 9) and located at the end of the flue gas discharge channel (P).
The battery system according to any one of claims 1 to 24, wherein the pressure relief port of the first pressure relief mechanism (20A) faces the smoke discharge channel (P) to discharge gas directly into the Smoke exhaust channel (P).
The battery system according to any one of claims 1 to 25, wherein the battery system is a power battery system or a battery energy storage system.
An electrical device includes the battery system according to any one of claims 1 to 26, the battery system being used to supply power to the electrical device.
An energy storage device comprising the battery system according to any one of claims 1 to 26, the energy storage device using the battery (B) of the battery system as an energy storage carrier.