Battery case, battery, and power consumption device

Abstract

A battery case, a battery, and an electric power consuming device. The battery case (41) includes a case body (10) having a plurality of side walls surrounding an accommodation space for accommodating battery cells (42), and a first pressure relief mechanism (20) installed on at least one side wall and used for pressure relief of the battery case (41), and the first pressure relief mechanism (20) does not protrude outward from the at least one side wall.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and particularly to a battery case, a battery, and a power consumption device.

Background Art

[0002] Secondary batteries, particularly lithium-ion batteries, have advantages such as high voltage, high specific energy, long cycle life, environmental friendliness, no pollution, a wide operating temperature range, and low self-discharge. They are widely applied in the fields of portable electronic devices and power devices for large new energy electric vehicles, and have great significance in solving human environmental pollution and energy crises. With the wide application of lithium-ion batteries, the safety performance of the batteries has become a problem of great concern to users.

Summary of the Invention

[0003] According to one aspect of the present disclosure, a battery case is provided, and this battery case includes a case body having a plurality of side walls surrounding an accommodation space for accommodating battery cells, and at least one first pressure relief mechanism installed on at least one side wall and used for pressure relief of the battery case. The first pressure relief mechanism does not protrude outward from the at least one side wall.

[0004] In this embodiment, the first pressure relief mechanism is installed on at least one side wall of the case body. When the battery cells in the case body run out of control, the generated high-temperature and high-pressure gas can escape outside the case body through the first pressure relief mechanism, thereby improving the safety in use of the battery. By making the first pressure relief mechanism not protrude outward from the side wall, risks such as failure or destruction of the first pressure relief mechanism due to collision between the first pressure relief mechanism and the external structure of the case body can be effectively reduced or avoided, further improving the safety in use of the battery.

[0005] In some embodiments, the at least one side wall includes a bottom plate of the case body, and the first pressure relief mechanism is installed on the bottom plate.

[0006] By installing the first pressure relief mechanism on the bottom plate of the case body and making the first pressure relief port of the first pressure relief mechanism flush with the outer surface of the bottom plate or recessed with respect to the outer surface of the bottom plate, when the battery cell runs away, the generated high-temperature and high-pressure gas can be discharged from the lower side of the case body, reducing the pressure inside the case body, and making it less likely for the first pressure relief mechanism to collide with or be pressed by the support structure below the case body. Thereby, the reliability of the first pressure relief mechanism is ensured, and the safety in the use of the battery is improved.

[0007] In some embodiments, the outer surface of the bottom plate has a first groove, and the first pressure relief mechanism is fitted in the first groove.

[0008] The first groove is installed on the outer surface of the bottom plate, and the first pressure relief mechanism is fitted in the first groove. In this way, by utilizing the concave structure of the first groove to realize the accommodation and fixation of the first pressure relief mechanism, not only the requirement that the first pressure relief mechanism does not protrude from the outer surface of the bottom plate outward is satisfied, but also the first pressure relief mechanism can be firmly attached to the bottom plate.

[0009] In some embodiments, the inner surface of the bottom plate has a first protrusion located on the opposite side of the first groove.

[0010] The first protrusion is installed on the inner surface of the bottom plate on the opposite side of the first groove. By using a mature process such as sheet metal, the first groove and the first protrusion can be formed on the bottom plate at the same time. Such a bottom plate having the first protrusion and the first groove can obtain better structural strength.

[0011] In some embodiments, a plurality of the first grooves are provided. The plurality of the first grooves are arranged at intervals along a first direction, and the longitudinal direction of the first grooves is parallel to a second direction. The first direction is perpendicular to the second direction, and both the first direction and the second direction are parallel to the outer surface of the bottom plate.

[0012] For installing a plurality of first pressure relief mechanisms, the plurality of first grooves may be arranged at intervals along a first direction parallel to the outer surface of the bottom plate, and each first groove may extend along a second direction. That is, the longitudinal direction of the first grooves is parallel to the second direction. Here, the second direction is parallel to the outer surface of the bottom plate and parallel to the first direction. In this way, by utilizing the longitudinal direction of the first grooves, a guiding role can be played for the high-temperature and high-pressure air flow discharged from the first pressure relief mechanism.

[0013] In some embodiments, in the height direction of the case body, the outer surface of the bottom plate is lower than the geometric center of the first pressure relief mechanism, and the ratio W / H of the distance W from the outer surface of the bottom plate to the geometric center of the first pressure relief mechanism to the height H of the case body satisfies W / H≥0.001.

[0014] By setting W / H to 0.001 or more, the risk due to tolerance can be effectively reduced.

[0015] In some embodiments, the battery case further includes a support bar installed on the inner surface of the bottom plate and configured to support a battery cell installed in the accommodation space. In the height direction of the case body, the support bar is higher than the first protrusion.

[0016] By installing support bars on the inner surface of the bottom plate, it plays a role in supporting the battery cells. And by making the support bars higher than the first protrusion in the height direction of the case body, an exhaust chamber can be formed between the lower end of the battery cell and the inner surface of the bottom plate, and it is ensured that a certain exhaust interval can be formed between the battery cell and the first pressure relief mechanism, ensuring that the high-temperature and high-pressure gas discharged from the battery cell can smoothly escape to the outside through the first pressure relief mechanism.

[0017] In some embodiments, a plurality of the support bars are installed, and the plurality of support bars are arranged at intervals along a first direction parallel to the outer surface of the bottom plate, and the first protrusion is located between two adjacent support bars.

[0018] The plurality of support bars may be used to support a plurality of rows of battery cells. Installing the first protrusion between two adjacent support bars avoids the mutual interference between the first protrusion and the support bars.

[0019] In some embodiments, the support bar has a cavity, the upper surface of the support bar for supporting the battery cell has a plurality of first through holes penetrating the cavity, and at least one side surface connected to the upper surface on the support bar has a plurality of second through holes penetrating the cavity.

[0020] The support bar having a cavity, a first through hole, and a second through hole is even lighter in weight, and when the battery cell fails, it is also acceptable for the high-temperature and high-pressure gas to flow through the support bar. When the first through hole of the support bar is at least partially aligned with the second pressure relief mechanism at the lower end of the battery cell, when the battery cell fails, the high-temperature and high-pressure gas inside the battery cell enters the cavity of the support bar from the second pressure relief mechanism through the first through hole, and then flows out of the support bar through the plurality of second through holes via the cavity, and can escape to the outside from the first pressure relief mechanism. In this way, it is possible to avoid as much as possible the high-temperature and high-pressure gas suddenly escaping from the first pressure relief mechanism and causing an open fire outside the battery due to the high-temperature and high-pressure gas.

[0021] In some embodiments, the at least one side wall includes at least one side plate of the case body, and the first pressure relief mechanism is installed on the at least one side plate.

[0022] By installing the first pressure relief mechanism on the side plate of the case body and making the first pressure relief port of the first pressure relief mechanism flush with the outer surface of the side plate or recessed with respect to the outer surface of the side plate, when the battery cell runs away, the generated high-temperature and high-pressure gas can be discharged from the side of the case body, reducing the pressure inside the case body, and making it less likely for the first pressure relief mechanism to collide with or be pressed by other structures on the side of the case body. Thereby, the reliability of the first pressure relief mechanism is ensured, and the safety in the use of the battery is improved.

[0023] In some embodiments, the outer surface of the side plate has a second groove, and the first pressure relief mechanism is fitted in the second groove.

[0024] The second groove is installed on the outer surface of the side plate, and the first pressure relief mechanism is fitted in the second groove. In this way, by utilizing the concave structure of the second groove to realize the accommodation and fixation of the first pressure relief mechanism, it not only meets the requirement that the first pressure relief mechanism does not protrude from the outer surface of the side plate outward, but also enables the first pressure relief mechanism to be securely attached to the side plate.

[0025] In some embodiments, the at least one side plate includes two opposite side plates, at least two first pressure relief mechanisms are installed, and at least two of the first pressure relief mechanisms are respectively installed on the two opposite side plates.

[0026] By installing at least two first pressure relief mechanisms on two opposite side plates respectively, when the battery cell runs away, the high-temperature and high-pressure gas inside the case body can escape from the first pressure relief mechanisms on the two opposite side plates, shortening the path during gas pressure relief, making the pressure relief more balanced and more effective.

[0027] In some embodiments, in the height direction of the case body, the ratio W / H of the distance W from the outer surface of the bottom plate to the geometric center of the first pressure relief mechanism to the height H of the case body satisfies W / H < 1.

[0028] By making the ratio W / H of the distance W to the height H less than 1, the first pressure relief mechanism is not installed on the top cover of the case body. When the battery cell runs away, the risk that the high-temperature and high-pressure gas jets upward from the top cover of the battery case and enters the passenger compartment is reduced or avoided.

[0029] In one aspect of the present disclosure, a battery is provided, and this battery includes the aforementioned battery case, and a plurality of battery cells installed in the battery case. The battery including the aforementioned battery case has higher safety in use.

[0030] In some embodiments, the battery cell has an electrode terminal and a second pressure relief mechanism. In the height direction of the case body, the minimum distance h between the second pressure relief port of the second pressure relief mechanism and the electrode terminal is greater than the minimum distance L between the second pressure relief port of the second pressure relief mechanism and the inlet of the first pressure relief mechanism of the battery case.

[0031] By making the minimum distance h between the second pressure relief port of the second pressure relief mechanism of the battery cell and the electrode terminal greater than the minimum distance L between the second pressure relief port of the second pressure relief mechanism and the inlet of the first pressure relief mechanism, when a runaway occurs in the battery cell, if the high-temperature and high-pressure gas in the battery cell escapes from the second pressure relief port of the second pressure relief mechanism, since the second pressure relief port is closer to the inlet of the first pressure relief mechanism, the high-temperature and high-pressure gas can escape out of the first pressure relief mechanism as much as possible first, and it becomes difficult for the high-temperature and high-pressure gas to flow to the electrode terminal and affect the insulation characteristics of the battery cell. In this way, it is also possible to omit the installation of a dedicated exhaust passage in the battery case, simplify the design, and reduce the manufacturing difficulty and manufacturing cost of the battery case and the battery.

[0032] In some embodiments, the first pressure relief mechanism is located on the side where the second pressure relief mechanism is away from the electrode terminal.

[0033] By installing the first pressure relief mechanism on the side away from the electrode terminal with respect to the second pressure relief mechanism, the high-temperature and high-pressure gas that has escaped from the second pressure relief mechanism can escape to the outside more quickly via the first pressure relief mechanism, and it also becomes more difficult for the gas to flow to the electrode terminal and affect the insulation characteristics of the battery cell.

[0034] In some embodiments, the second pressure relief mechanism and the electrode terminal are respectively located at the lower end and the upper end of the battery cell, the first pressure relief mechanism is located on the bottom plate of the case body, and in the height direction of the case body, the inlet of the first pressure relief mechanism is lower than the second pressure relief port of the second pressure relief mechanism.

[0035] Install the second pressure relief mechanism and the electrode terminal at the lower end and the upper end of the battery cell respectively, position the first pressure relief mechanism on the bottom plate of the case body, and make it lower than the second pressure relief mechanism. In this way, the high-temperature and high-pressure gas that has escaped from the second pressure relief mechanism can be discharged to the outside more quickly from the bottom of the battery case, and it can have little or minimal impact on the insulation characteristics of the battery cell.

[0036] In some embodiments, the orthographic projection of the second pressure relief mechanism of the battery cell on the inner surface of the bottom plate of the case body does not overlap with the orthographic projection of the first pressure relief mechanism on the inner surface of the bottom plate of the case body.

[0037] The non-overlap of the orthographic projections of the second pressure relief mechanism and the first pressure relief mechanism on the inner surface of the bottom plate can avoid the high-temperature and high-pressure gas that has escaped from the second pressure relief mechanism from being discharged to the outside rapidly via the first pressure relief mechanism, thereby avoiding the risk of an open fire occurring outside the battery due to the high-temperature and high-pressure combustible gas.

[0038] In some embodiments, in the height direction of the case body, the ratio L / S of the minimum distance L to the minimum distance S between the inlet of the first pressure relief mechanism and the electrode terminal satisfies 0.001 ≦ L / S ≦ 1.

[0039] By making the L / S satisfy 0.001 ≦ L / S ≦ 1, when thermal runaway occurs in the battery cell, the high-temperature and high-pressure gas in the battery cell can smoothly escape to the outside through the second pressure relief mechanism and the first pressure relief mechanism, and the influence on the insulation performance of the battery can be avoided as much as possible, thereby improving the safety and reliability in the use of the battery.

[0040] In one aspect of the present disclosure, a power consumption device is provided, and this power consumption device includes the aforementioned battery, and the battery is used to provide electrical energy to the power consumption device.

[0041] The power consumption device using the aforementioned battery has better safety in use.

[0042] To more clearly explain the technical solutions of the embodiments of the present disclosure, hereinafter, the drawings necessary for use in the embodiments of the present disclosure will be briefly described. Obviously, the drawings described below are only some embodiments of the present disclosure, and those skilled in the art can obtain other drawings based on these drawings without creative efforts.

[0043] With reference to the drawings, the present disclosure can be more clearly understood based on the following detailed description.

Brief Description of the Drawings

[0044]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Embodiments for Carrying Out the Invention

[0045] It should be understood that the dimensions of each part shown in the drawings are not drawn according to the actual proportional relationship. The same or similar reference numerals represent the same or similar members.

[0046] Hereinafter, the embodiments of the present disclosure will be described in more detail by combining the drawings and the embodiments. The following detailed description of the embodiments and the drawings are for exemplarily explaining the principle of the present disclosure, but do not limit the scope of the present disclosure, that is, the present disclosure is not limited to the described embodiments.

[0047] In the description of the present disclosure, it should be pointed out that, unless otherwise specifically described, "a plurality" means two or more, and the orientation or positional relationship indicated by terms such as "up", "down", "left", "right", "inside", "outside", etc. does not indicate or imply that the indicated device or element must have a specific orientation and must be configured and operated in a specific orientation. Instead, it is only for facilitating the description of the present disclosure and simplifying the description, and should not be understood as a limitation of the present disclosure. It should be noted that terms such as "first", "second", "third", etc. are used only for the purpose of description and should not be understood 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.

[0048] Any directional terms 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 be further noted that, unless otherwise explicitly specified and limited, terms such as "attachment", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection, and it may be directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present disclosure may be understood according to specific situations.

[0049] Hereinafter, some embodiments of the present invention will be described in detail with reference to the drawings. Unless there is a contradiction, the features in the following embodiments can be combined with each other.

[0050] In some related technologies, a first explosion-proof valve is installed on the bottom plate of the battery case body as a pressure relief mechanism, and inside the case body, a dedicated air flow path structure is installed to guide the high-temperature and high-pressure gas discharged from the explosion-proof valve of the battery cell to the first explosion-proof valve. The inventors have found through research that due to structural design and assembly tolerances, etc., the first explosion-proof valve may protrude from the surface of the bottom plate. Thus, in some scenarios such as when the battery is mounted on a vehicle, the first explosion-proof valve may collide with or be pressed by other structures, resulting in a failure of the first explosion-proof valve, thereby affecting the safety in the use of the battery. In addition, the installation of a dedicated air flow path structure inside the case body makes the design of the battery case body more complex, leading to an increase in the manufacturing difficulty and manufacturing cost of the battery case body and the battery.

[0051] In view of this, the embodiments of the present disclosure provide a battery case, a battery, and a power consumption device that can improve the safety in the use of the battery.

[0052] The battery case according to the embodiments of the present disclosure is applicable to various batteries. The battery may be used to supply power to a power-consuming device such as a vehicle. For example, it supplies a power source for steering or a power source for driving and traveling to the vehicle. The battery may include a battery cell and a battery case for accommodating the battery cell. The battery cell may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc., but in the embodiments of the present disclosure, it is not limited thereto. The battery cell may have a cylindrical shape, a flat shape, a rectangular parallelepiped shape, or other shapes, etc., and in the embodiments of the present disclosure, it is not limited thereto either.

[0053] The battery case can accommodate a battery module including a plurality of battery cells connected in series, in parallel, or in series-parallel, and various types of battery cells. The battery module can be mounted within the case body of the battery case. As the minimum unit constituting the battery, the battery cell can include an electrode assembly capable of generating an electrochemical reaction.

[0054] The battery according to the embodiments of the present disclosure is applicable to various power-consuming devices using the battery. The power-consuming device may be a mobile phone, a portable device, a notebook computer, an electric bicycle, an electric vehicle, a ship, a spacecraft, an electric toy, and an electric tool, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle, and a spaceship, etc. The electric toy includes a stationary or mobile electric toy, such as a game console, an electric vehicle toy, an electric ship toy, and an electric airplane toy, etc. The electric tool includes a metal-cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric driver, an electric hammer, an electric impact drill, a concrete vibrator, and an electric milling machine, etc. In the embodiments of the present disclosure, there is no particular limitation on the above power-consuming devices.

[0055] FIG. 1 is a schematic structural diagram of a power consumption device according to some embodiments of the present disclosure. For convenience, it will be described by taking the example that the power consumption device is a vehicle. The vehicle 50 may be a fuel oil vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle or a hybrid electric vehicle, etc. The battery 40 may be installed at the bottom, front, or rear of the vehicle 50.

[0056] The battery 40 may be used for supplying power to the vehicle 50. For example, taking the battery 40 as the operating power source of the vehicle 50, it can be used in the electrical circuit system of the vehicle 50. For example, it can be used for the operating power requirements during the start, navigation, and running of the vehicle 50. The battery 40 can not only be used as the operating power source of the vehicle 50, but also as the driving power source of the vehicle 50 to provide driving power to the vehicle 50 instead of, or partly instead of, fuel oil or natural gas.

[0057] Inside the vehicle 50, an axle, wheels, a motor 52, and a controller 51 may be further installed. The controller 51 is used to control the battery 40 to supply power to the motor 52. For example, when used in the vehicle 50 with the battery 40 as the driving power source, the controller 51 supplies the power required for constant speed and acceleration to the motor 52. The motor 52 is used to drive the rotation of the axle, thereby driving the rotation of the wheels.

[0058] FIG. 2 is a schematic structural diagram of a battery according to some embodiments of the present disclosure. FIGS. 3 and 4 are respectively exploded schematic diagrams of the battery from different perspectives according to some embodiments of the present disclosure. FIG. 5 is a schematic xz cross-sectional view of the battery according to some embodiments of the present disclosure.

[0059] Referring to FIGS. 2 to 5, in some embodiments, the battery 40 includes a battery case 41 and a plurality of battery cells 42 installed in the battery case 41. The battery case 41 provides functions such as accommodating, supporting, cooling, sealing, and preventing collision for the battery cells 42, and further can avoid foreign substances such as liquid from the outside having an adverse effect on the charge and discharge or safety of the battery cells.

[0060] In FIGS. 2 to 5, the battery cells 42 are electrically connected to each other, for example, connected in series, in parallel, or in series-parallel to realize the electrical characteristic parameters of the required battery 40. The plurality of battery cells 42 are arranged in a row, and one row or a plurality of rows of battery cells 42 may be installed in the case body as required.

[0061] In some embodiments, each battery cell 42 of the battery 40 can be arranged along at least one of the longitudinal direction and the width direction of the battery case. According to the actual demand, at least one row or one column of battery cells 42 can be installed. According to the demand, in the height direction of the battery 40, one layer or a plurality of layers of battery cells 42 can also be installed.

[0062] In some embodiments, a plurality of battery cells 42 are first connected in series, in parallel, or in series-parallel to form a battery module, and then a plurality of battery modules are connected in series, in parallel, or in series-parallel to form a whole, which may be accommodated in the battery case 41. In some other embodiments, all the battery cells 42 are directly connected in series, in parallel, or in series-parallel, and the whole composed of all the battery cells 42 is accommodated in the battery case 41.

[0063] Referring to FIGS. 2 to 4, the embodiment of the present disclosure provides a battery case 41, which includes a case body 10 and a first pressure relief mechanism 20. The case body 10 has a plurality of side walls surrounding an accommodation space for accommodating the battery cells 42. The first pressure relief mechanism 20 is installed on at least one side wall and is used for pressure relief of the battery case 41. The first pressure relief mechanism 20 does not protrude outward from the at least one side wall.

[0064] In this embodiment, the first pressure relief mechanism 20 is installed on at least one side wall of the case body 10. When the battery cell 42 in the case body 10 runs amok, the generated high-temperature and high-pressure gas can escape outside the case body 10 through the first pressure relief mechanism 20, thereby improving the safety in the use of the battery 40. By making the first pressure relief mechanism 20 not protrude from the side wall outward, risks such as the failure and destruction of the first pressure relief mechanism 20 caused by the collision between the first pressure relief mechanism 20 and the external structure of the case body 10 can be effectively reduced or avoided, further improving the safety in the use of the battery 40.

[0065] In this embodiment, the plurality of side walls of the case body 10 may include a bottom plate 11, side plates 12, and a top cover 13 that can be sequentially stacked and installed to surround the internal accommodation space. In FIG. 3, four side plates 12 are connected to form a rectangular frame, and the bottom plate 11 and the top cover 13 are respectively installed on the upper and lower sides of the rectangular frame. In some other embodiments, the plurality of side walls of the case body 10 may include a bottom plate 11 and a top cover 13 that can be sequentially stacked and installed to surround the internal accommodation space.

[0066] The first pressure relief mechanism 20 is for discharging the internal pressure of the battery case 41. In some embodiments, the first pressure relief mechanism 20 may be an explosion-proof valve, but it may also be an explosion-proof sheet, an air valve, a pressure relief valve, a safety valve, etc.

[0067] For the convenience of description, referring to FIGS. 2 to 5, the height direction of the battery case 41 is defined as z. In a plane perpendicular to the height direction z of the battery case 41, the first direction x and the second direction y that are perpendicular to each other can be respectively the longitudinal direction and the width direction of the battery case 41. The plurality of battery cells 42 may be arranged in an array along the first direction x and the second direction y. For each side wall of the case body 10, the inner side and the outer side are defined by the inside and the outside of the case body 10. For example, the inner surface of a certain side wall is the surface of the side wall close to the internal accommodation space of the case body, and the outer surface is the surface of the side wall away from the internal accommodation space of the case body.

[0068] In the normal arrangement state of the battery case 41, the bottom plate 11 of the battery case 41 is at least partially located below the battery cell 42, and the top cover 13 is at least partially located above the battery cell 42. The battery case 41 may be arranged in other directions. For example, in a state where the battery case 41 is placed horizontally, one side plate is at least partially located below the battery cell 42, and the other side plate 12 opposite thereto is at least partially located above the battery cell 42. Further, for example, the battery case 41 may be turned upside down, that is, the top cover 13 of the battery case 41 is at least partially located below the battery cell 42, but the bottom plate 11 is at least partially located above the battery cell 42.

[0069] Referring to FIGS. 3 to 5, in some embodiments, the at least one side wall includes the bottom plate 11 of the case body 10, and the first pressure relief mechanism 20 is installed on the bottom plate 11. The first pressure relief mechanism 20 may be installed on the bottom plate 11 by adopting a plurality of installation methods, such as fastening, adhesion, bolt connection, etc.

[0070] In this embodiment, the first pressure relief mechanism 20 is installed on the bottom plate 11 of the case body 10, and the first pressure relief port 21 of the first pressure relief mechanism 20 is flush with the outer surface 11a of the bottom plate 11 or recessed with respect to the outer surface 11a of the bottom plate 11. When the battery cell 42 runs away, the generated high-temperature and high-pressure gas can be discharged from the lower side of the case body 10, the pressure inside the case body 10 can be reduced, and it is less likely that the first pressure relief mechanism 20 hits or is pressed by the support structure below the case body 10. Thereby, the reliability of the first pressure relief mechanism 20 is ensured, and the safety in use of the battery 40 is improved.

[0071] FIG. 6 is a schematic structural view of the bottom plate of the battery case according to some embodiments of the present disclosure. FIGS. 7(a) and 7(b) are schematic structural views of the bottom plate viewed from the upward angle and the downward angle in FIG. 6, respectively. Referring to FIG. 7(a), in some embodiments, the outer surface 11a of the bottom plate 11 has a first groove 111, and the first pressure relief mechanism 20 is fitted into the first groove 111. Along the height direction z of the case body 10, the groove wall and the groove bottom of the first groove 111 are higher than the outer surface of the bottom plate 11. In FIG. 7(a), a through hole 23 for communicating the inside and the outside of the bottom plate 11 may be installed at the groove bottom of the first groove 111.

[0072] The first groove 111 is installed on the outer surface 11a of the bottom plate 11, and the first pressure relief mechanism 20 is fitted into the first groove 111. In this way, by utilizing the concave structure of the first groove 111, realizing the accommodation and fixation of the first pressure relief mechanism 20 not only meets the requirement that the first pressure relief mechanism 20 does not protrude from the outer surface 11a of the bottom plate 11 outward, but also enables the first pressure relief mechanism 20 to be securely attached to the bottom plate 11.

[0073] Referring to FIGS. 3 to 6 and FIG. 7(b), in some embodiments, the inner surface 11b of the bottom plate 11 has a first protrusion 112 located on the opposite side of the first groove 111. In the structure where the first protrusion 112 located on the opposite side of the first groove 111 is installed on the inner surface 11b of the bottom plate 11, the first groove 111 and the first protrusion 112 can be simultaneously formed on the bottom plate 11 by using a mature process such as sheet metal. In addition, the bottom plate 11 having the first protrusion 112 and the first groove 111 can obtain better structural strength, withstand impact, and be difficult to deform.

[0074] The first groove 111 may adopt cross-sections of various shapes, such as a circular cross-section, a polygonal cross-section, etc. The number of the first grooves 111 may be set to one, but may also be set to a plurality. For the plurality of the first grooves 111, at least one first pressure relief mechanism 20 may be installed in each first groove 111. Referring to FIGS. 3 to 7(b), in some embodiments, a plurality of the first grooves 111 are provided, and the plurality of the first grooves 111 are arranged at intervals along a first direction x, and the longitudinal direction of the first groove 111 is parallel to a second direction y, the first direction x is perpendicular to the second direction y, and both the first direction x and the second direction y are parallel to the outer surface 11a of the bottom plate 11.

[0075] In order to install a plurality of the first pressure relief mechanisms 20, the plurality of the first grooves 111 may be arranged at intervals along a first direction x parallel to the outer surface 11a of the bottom plate 11, and each first groove 111 may extend along a second direction y, that is, the longitudinal direction of the first groove 111 is parallel to the second direction y. Here, the second direction y is parallel to the outer surface 11a of the bottom plate 11 and parallel to the first direction x. In this way, by using the longitudinal direction of the first groove 111, a guiding role for the high-temperature and high-pressure air flow discharged from the first pressure relief mechanism 20 can be played.

[0076] FIG. 8 is a schematic diagram of the size relationship of the bottom plate of the battery case according to some embodiments of the present disclosure. Referring to FIG. 8, in some embodiments, in the height direction z of the case body 10, the outer surface 11a of the bottom plate 11 is lower than the geometric center 22 of the first pressure relief mechanism 20, and in the height direction z of the case body 10, the ratio W / H of the distance W from the outer surface 11a of the bottom plate 11 to the geometric center 22 of the first pressure relief mechanism 20 to the height H of the case body 10 (refer to FIG. 2) satisfies W / H≧0.001. Here, the geometric center 22 may be the midpoint of the first pressure relief mechanism 20 in the height direction z of the case body 10.

[0077] H may adopt a value of 50 to 1000 mm. When the first pressure relief mechanism 20 is installed on the bottom plate 11, W may adopt a value of 1 to 1000 mm. However, when the first pressure relief mechanism 20 is installed on the side plate 12, W may adopt a value of 10 to 990 mm. The distance W represents the depth of the inner recess of the first pressure relief mechanism 20 installed on the bottom plate 11 with respect to the outer surface 11a of the bottom plate 11. When considering the tolerance factor, if the depth of the inner recess is set to be too small, there is still a risk that the first pressure relief mechanism 20 will protrude from the outer surface 11a of the bottom plate 11 and be collided with or pressed by the external structure. Therefore, by setting W / H to be 0.001 or more, the above risk caused by the tolerance can be effectively reduced.

[0078] Referring to the above embodiments, in one experimental example, the value of H is 200 mm, the value of W is 20 mm, and calculating W / H gives 0.1, and the value of W / H satisfies the requirement of W / H≥0.001. In the experimental results, the first pressure relief mechanism 20 can reliably and effectively relieve pressure.

[0079] Referring to the above embodiments, in another experimental example, the value of H is 200 mm, the value of W is 5 mm, and calculating W / H gives 0.025, and the value of W / H satisfies the requirement of W / H≥0.001. In the experimental results, the first pressure relief mechanism 20 can reliably and effectively relieve pressure.

[0080] Referring to the above embodiments, in one comparative experimental example, the value of H is 1000 mm, the value of W is 0.5 mm, and calculating W / H gives 0.0005, and the value of W / H does not satisfy the requirement of W / H≥0.001. In the experimental results, the first pressure relief mechanism 20 collided with the outer surface of the bottom plate and malfunctioned due to protruding outwards.

[0081] As can be seen from the above experimental examples and comparative experimental examples, by making the value of W / H satisfy W / H≥0.001, the risk that the first pressure relief mechanism 20 protrudes from the outer surface 11a of the bottom plate 11 due to the tolerance and is collided with or pressed by the external structure can be effectively reduced.

[0082] Referring to FIGS. 3 to 8, in some embodiments, the battery case 41 further includes a support bar 30. The support bar 30 is installed on the inner surface 11b of the bottom plate 11 and is configured to support the battery cell 42 installed in the accommodation space. Referring to FIGS. 5 and 8, in the height direction z of the case body 10, the support bar 30 is higher than the first protrusion 112.

[0083] By installing the support bar 30 on the inner surface 11b of the bottom plate 11, it plays a role in supporting the battery cell 42, and by making the support bar 30 higher than the first protrusion 112 in the height direction z of the case body 10, an exhaust chamber can be formed between the lower end of the battery cell 42 and the inner surface 11b of the bottom plate 11, and it is ensured that a certain exhaust interval can be formed between the battery cell 42 and the first pressure relief mechanism 20, ensuring that the high-temperature and high-pressure gas discharged from the battery cell 42 smoothly escapes to the outside through the first pressure relief mechanism 20.

[0084] Referring to FIGS. 3 to 5, in some embodiments, a plurality of the support bars 30 are installed. The plurality of support bars 30 are arranged at intervals along the first direction x parallel to the outer surface 11a of the bottom plate 11, and the first protrusion 112 is located between two adjacent support bars 30. The plurality of support bars 30 may be used to support a plurality of rows of battery cells 42. Installing the first protrusion 112 between two adjacent support bars 30 can avoid mutual interference between the first protrusion 112 and the support bar 30.

[0085] Referring to FIGS. 4 and 8, in some embodiments, the support bar 30 has a cavity 33. The upper surface of the support bar 30 for supporting the battery cell 42 has a plurality of first through holes 31 penetrating the cavity 33, and at least one side surface connected to the upper surface on the support bar 30 has a plurality of second through holes 32 penetrating the cavity 33.

[0086] The support bar 30 having the cavity 33, the first through hole 31, and the second through hole 32 is even lighter in weight, which helps to reduce the weight of the entire battery. And when the battery cell 42 fails, the high-temperature and high-pressure gas can flow through the support bar 30. If the first through hole 31 of the support bar 30 is at least partially aligned with the second pressure relief mechanism at the lower end of the battery cell 42, when the battery cell 42 fails, the high-temperature and high-pressure gas inside the battery cell 42 enters the cavity 33 of the support bar 30 from the second pressure relief mechanism through the first through hole 31, and then flows out of the support bar 30 through the plurality of second through holes 32 via the cavity 33, and escapes from the first pressure relief mechanism 20 to the outside. In this way, it is possible to avoid as much as possible the high-temperature and high-pressure gas suddenly escaping from the first pressure relief mechanism 20 and causing an open fire outside the battery 40 due to the high-temperature and high-pressure gas. The plurality of through holes 32 can realize the distribution of the high-temperature and high-pressure gas in the cavity 33, making the high-temperature and high-pressure gas flowing out of the support bar 30 more balanced in the longitudinal direction of the support bar 30, and avoiding the local pressure in the battery case being too high due to the local accumulation of the high-temperature and high-pressure gas.

[0087] In the above embodiment, the first pressure relief mechanism 20 may be installed on the bottom plate 11 of the case body 10. In some other embodiments, the first pressure relief mechanism 20 may be installed on other side walls of the case body 10, or not only is the first pressure relief mechanism 20 installed on the bottom plate 11, but also the first pressure relief mechanism 20 is installed on other side walls of the case body 10.

[0088] FIG. 9 is a schematic structural view of a side plate of a battery case according to some embodiments of the present disclosure. Referring to FIGS. 2 to 4 and FIG. 9, in some embodiments, the at least one side wall includes at least one side plate 12 of the case body 10, and the first pressure relief mechanism 20 is installed on the at least one side plate 12.

[0089] In this embodiment, the first pressure relief mechanism 20 is installed on the side plate 12 of the case body 10, and the first pressure relief port 21 of the first pressure relief mechanism 20 is flush with the outer surface 12a of the side plate 12 or recessed with respect to the outer surface 12a of the side plate 12. When the battery cell 42 runs away, the generated high-temperature and high-pressure gas can be discharged from the side of the case body 10, the pressure inside the case body 10 can be reduced, and the first pressure relief mechanism 20 is less likely to collide with or be pressed by other structures on the side of the case body 10. Thereby, the reliability of the first pressure relief mechanism 20 is ensured, and the safety in the use of the battery 40 is improved.

[0090] Referring to FIGS. 3 and 9, in some embodiments, the outer surface 12a of the side plate 12 has a second groove 121, and the first pressure relief mechanism 20 is fitted in the second groove 121. A through hole 24 for communicating the inside and the outside of the side plate 12 may be installed at the bottom of the second groove 121.

[0091] The second groove 121 is installed on the outer surface of the side plate 12, and the first pressure relief mechanism 20 is fitted in the second groove 121. In this way, by using the concave structure of the second groove 121 to realize the accommodation and fixation of the first pressure relief mechanism 20 not only meets the requirement that the first pressure relief mechanism 20 does not protrude from the outer surface of the side plate 12 outward, but also the first pressure relief mechanism 20 can be firmly attached to the side plate 12.

[0092] In FIGS. 3 and 9, the at least one side plate 12 includes two opposing side plates 12, at least two first pressure relief mechanisms 20 are installed, and at least two of the first pressure relief mechanisms 20 are respectively installed on the two opposing side plates 12. For example, on each of the two opposing side plates 12, one first pressure relief mechanism 20 may be installed, and the two first pressure relief mechanisms 20 may be installed symmetrically or offset.

[0093] In this embodiment, at least two first pressure relief mechanisms 20 are respectively installed on two opposing side plates 12. When the battery cell 42 runs away, the high-temperature and high-pressure gas in the case body 10 can escape from the first pressure relief mechanisms 20 on the two opposing side plates 12, shortening the path during gas pressure relief, making the pressure relief more balanced and more effective.

[0094] In each of the above embodiments of the battery case, in the height direction z of the case body 10, the ratio W / H of the distance W from the outer surface 11a of the bottom plate 11 to the geometric center 22 of the first pressure relief mechanism 20 and the height H of the case body 10 can satisfy W / H < 1. By making the ratio W / H of the distance W to the height H less than 1, the first pressure relief mechanism 20 is not installed on the top cover of the case body 10. When the battery cell 42 runs away, the risk that the high-temperature and high-pressure gas jets upward from the top cover of the battery case 41 and enters the passenger compartment is reduced or prevented.

[0095] Referring to the above embodiments, in one experimental example, the value of H is 200 mm, the value of W is 20 mm, and calculating W / H gives 0.1, and the value of W / H satisfies the requirement of W / H < 1. In the experimental results, the first pressure relief mechanism 20 can reliably and effectively relieve pressure, and the high-temperature and high-pressure gas does not escape upward.

[0096] Referring to the above embodiments, in another experimental example, the value of H is 200 mm, the value of W is 5 mm, and calculating W / H gives 0.025, and the value of W / H satisfies the requirement of W / H < 1. In the experimental results, the first pressure relief mechanism 20 can reliably and effectively relieve pressure, and the high-temperature and high-pressure gas does not escape upward.

[0097] Referring to the above embodiments, in one comparative experimental example, the value of H is 200 mm, the value of W is 200 mm, and calculating W / H gives 1, and the value of W / H does not satisfy the requirement of W / H < 1. In the experimental results, since the first pressure relief mechanism is installed on the top cover, there is a risk that the high-temperature and high-pressure gas escapes upward and enters the passenger compartment.

[0098] As can be seen from the above experimental examples and comparative experimental examples, by making the value of W / H satisfy W / H < 1, when the battery cell 42 runs away, the high-temperature and high-pressure gas effectively reduces or prevents the risk of jetting upward from the top cover of the battery case 41 and entering the passenger compartment.

[0099] The battery cases according to the above embodiments can be applied to various types of batteries. Referring to FIGS. 2 to 5, the embodiments of the present application provide a battery 40 including the aforementioned battery case 41 and a plurality of battery cells 42. The plurality of battery cells 42 are installed in the battery case 41. The battery 40 including the aforementioned battery case 41 has higher safety in use.

[0100] FIG. 10 is a schematic diagram of the size relationship of a battery according to some embodiments of the present disclosure. Referring to FIGS. 4 and 10, in some embodiments, each battery cell 42 has an electrode terminal 421 and a second pressure relief mechanism 422. For a plurality of battery cells, the electrode terminals 421 of each battery cell may be electrically connected via a member such as a bus bar. The second pressure relief mechanism 422 is for releasing the internal pressure of the battery cell 42. For example, when a runaway situation such as thermal runaway occurs in the battery cell 42, the high-temperature and high-pressure gas generated inside can escape from the second pressure relief mechanism 422 to the outside. In some embodiments, the second pressure relief mechanism 422 may be an explosion-proof valve, but may also be an explosion-proof sheet, an air valve, a pressure relief valve, a safety valve, or the like.

[0101] In the height direction z of the case body 10, the minimum distance h between the second pressure relief port 422a of the second pressure relief mechanism 422 and the electrode terminal 421 is greater than the minimum distance L between the second pressure relief port 422a of the second pressure relief mechanism 422 and the inlet 25 of the first pressure relief mechanism 20 of the battery case 41.

[0102] After the battery cell 42 runs away, the high-temperature and high-pressure gas in the battery cell 42 escapes from the second pressure relief port 422a of the second pressure relief mechanism 422. Since the second pressure relief port 422a is closer to the inlet 25 of the first pressure relief mechanism 20, the high-temperature and high-pressure gas can escape as much as possible from the first pressure relief mechanism 20 first, and it becomes difficult to flow to the electrode terminal 421 and affect the insulation characteristics of the battery cell 42. Thus, it is also possible to omit the installation of a dedicated exhaust passage in the battery case 41, simplify the design, and reduce the manufacturing difficulty and manufacturing cost of the battery case 41 and the battery 40.

[0103] Referring to FIG. 10, in some embodiments, the first pressure relief mechanism 20 is located on the side where the second pressure relief mechanism 422 is away from the electrode terminal 421. Thus, by installing the first pressure relief mechanism 20 on the side where the second pressure relief mechanism 422 is away from the electrode terminal 421, the high-temperature and high-pressure gas released from the second pressure relief mechanism 422 can escape outside more quickly via the first pressure relief mechanism 20, and it also becomes more difficult to flow to the electrode terminal 421 and affect the insulation characteristics of the battery cell 42.

[0104] In FIG. 10, the second pressure relief mechanism 422 and the electrode terminal 421 may be located at the lower end and the upper end of the battery cell 42 respectively, the first pressure relief mechanism 20 may be located on the bottom plate 11 of the case body 10, and in the height direction z of the case body 10, the inlet 25 of the first pressure relief mechanism 20 is lower than the second pressure relief port 422a of the second pressure relief mechanism 422.

[0105] The second pressure relief mechanism 422 and the electrode terminal 421 are installed at the lower end and the upper end of the battery cell 42 respectively, the first pressure relief mechanism 20 is located on the bottom plate 11 of the case body 10, and is lower than the second pressure relief mechanism 422. In this way, the high-temperature and high-pressure gas released from the second pressure relief mechanism 422 can be discharged outside more quickly from the bottom of the battery case 41, and can affect the insulation characteristics of the battery cell 42 as little as possible or minimally.

[0106] Referring to FIG. 10, in some embodiments, the orthographic projection of the second pressure relief mechanism 422 of each battery cell 42 on the inner surface 11b of the bottom plate 11 of the case body 10 does not overlap with the orthographic projection of the first pressure relief mechanism 20 on the inner surface 11b of the bottom plate 11 of the case body 10.

[0107] The non - overlapping of the orthographic projections of the second pressure relief mechanism 422 and the first pressure relief mechanism 20 on the inner surface 11b of the bottom plate 11 can avoid the high - temperature and high - pressure gas escaped from the second pressure relief mechanism 422 being rapidly discharged outside through the first pressure relief mechanism 20. Thereby, the risk of an open fire occurring outside the battery 40 due to the high - temperature and high - pressure combustible gas is avoided.

[0108] In the battery according to each of the above embodiments, the second pressure relief mechanism 422 is not limited to being installed at the lower end of the battery cell, and may be installed at other parts of the battery cell, such as the side wall or the upper end. However, the first pressure relief mechanism 20 is not limited to being installed on the bottom plate, and may be installed on other side walls of the case body 10.

[0109] Referring to FIG. 10, in the height direction z of the case body 10, the ratio L / S of the minimum distance L between the second pressure relief port 422a of the second pressure relief mechanism 422 and the inlet 25 of the first pressure relief mechanism 20 of the battery case 41, and the minimum distance S between the inlet 25 of the first pressure relief mechanism 20 and the electrode terminal 421 can satisfy 0.001 ≦ L / S ≦ 1.

[0110] When the first pressure relief mechanism 20 is installed on the bottom plate 11, the value of L may be 1 to 200 mm, and the value of S may be 5 to 1000 mm. When the first pressure relief mechanism 20 is installed on the side plate 12, the value of L may be 1 to 800 mm, and the value of S may be 1 to 1000 mm. L represents the distance between the second pressure relief port 422a of the second pressure relief mechanism 422 and the inlet 25 of the first pressure relief mechanism 20 of the battery case 41. If L is too small compared to S, it means that the second pressure relief port 422a of the second pressure relief mechanism 422 is too close to the inlet 25 of the first pressure relief mechanism 20, indicating that the exhaust interval is insufficient, which affects the smooth escape of the high-temperature and high-pressure gas discharged from the battery cell 42 to the outside. If L is too large compared to S, it means that the inlet 25 of the first pressure relief mechanism 20 is close to the electrode terminal 421. Thus, when the high-temperature and high-pressure gas escapes to the outside via the first pressure relief mechanism 20, it is likely to flow to the electrode terminal 421 and affect the insulation performance of the battery 40.

[0111] Therefore, by making the ratio L / S satisfy 0.001 ≦ L / S ≦ 1, when a runaway occurs in the battery cell 42, the high-temperature and high-pressure gas in the battery cell 42 can smoothly escape to the outside via the second pressure relief mechanism 422 and the first pressure relief mechanism 20, and the influence on the insulation performance of the battery 40 can be avoided as much as possible. Thereby, the safety and reliability in the use of the battery 40 are improved.

[0112] Referring to the above embodiment, in one experimental example, the value of L is 20 mm, the value of S is 200 mm, and L / S is calculated to obtain 0.1. The value of L / S satisfies the requirement of 0.001 ≦ L / S ≦ 1. In the experimental results, when the high-temperature and high-pressure gas in the case body is discharged from the first pressure relief mechanism 20, it does not cause problems that affect the insulation performance of the electrode terminals and busbars.

[0113] Referring to the above embodiments, in another experimental example, the value of L is 10 mm, the value of S is 300 mm, and calculating L / S gives approximately 0.0333. The value of L / S satisfies the requirement of 0.001 ≤ L / S ≤ 1. In the experimental results, when the high-temperature and high-pressure gas in the case body is discharged from the first pressure relief mechanism 20, it does not cause problems that affect the insulation performance of the electrode terminals and busbars.

[0114] Referring to the above embodiments, in yet another experimental example, the value of L is 5 mm, the value of S is 1000 mm, and calculating L / S gives 0.005. The value of L / S satisfies the requirement of 0.001 ≤ L / S ≤ 1. In the experimental results, when the high-temperature and high-pressure gas in the case body is discharged from the first pressure relief mechanism 20, it does not cause problems that affect the insulation performance of the electrode terminals and busbars.

[0115] Referring to the above embodiments, in a comparative example, the value of L is 200 mm, the value of S is 20 mm, and calculating L / S gives 10. The value of L / S does not satisfy the requirement of 0.001 ≤ L / S ≤ 1. In the experimental results, when the high-temperature and high-pressure gas in the case body is discharged from the first pressure relief mechanism 20, it results in a decrease in the insulation performance of the electrode terminals and busbars.

[0116] As can be seen from the above experimental examples and comparative experimental examples, by making L / S satisfy 0.001 ≤ L / S ≤ 1, when a runaway occurs in the battery cell 42, the high-temperature and high-pressure gas in the battery cell 42 can smoothly escape outside through the second pressure relief mechanism 422 and the first pressure relief mechanism 20, and the influence on the insulation performance of the battery 40 can be avoided as much as possible. Thereby, the safety and reliability in the use of the battery 40 can be effectively improved.

[0117] In one aspect of the present disclosure, a power consumption device is provided, and the power consumption device includes the aforementioned battery, and the battery is used to provide electrical energy to the power consumption device. The power consumption device using the aforementioned battery can obtain better safety in use.

[0118] The present disclosure has been described with reference to the preferred embodiments, but various improvements can be made thereto without departing from the scope of the present disclosure, and members thereof may be replaced with equivalent ones. In particular, as long as there is no structural contradiction, the technical features mentioned in each embodiment may be combined in any manner. The present disclosure is not limited to the specific embodiments disclosed herein, but includes all technical solutions included in the claims.

Explanation of Reference Numerals

[0119] 10: Case body 11: Bottom plate 12: Side plate 13: Top cover 111: First groove 112: First protrusion 121: Second groove 11a: Outer surface of the bottom plate 11b: Inner surface of the bottom plate 12a: Outer surface of the side plate 20: First pressure relief mechanism 21: First pressure relief port 22: Geometric center 23, 24: Through holes 25: Inlet 30: Support bar 31: First through hole 32: Second through hole 33: Cavity 40: Battery 41: Battery case 42: Battery cell 421: Electrode terminal 422: Second pressure relief mechanism 422a: Second pressure relief port 50: Vehicle 51: Controller 52: Motor

Claims

1. A battery case (41), wherein the battery case (41) comprises: A case body (10) having a plurality of side walls surrounding an accommodation space for accommodating a battery cell (42); and At least one first pressure relief mechanism (20) installed on at least one side wall and used for pressure relief of the battery case (41), The first pressure relief mechanism (20) does not protrude from the at least one side wall outward, the battery case (41).

2. The at least one side wall includes a bottom plate (11) of the case body (10), and the first pressure relief mechanism (20) is installed on the bottom plate (11). The battery case (41) according to Claim 1.

3. The outer surface (11a) of the bottom plate (11) has a first groove (111), and the first pressure relief mechanism (20) is fitted into the first groove (111). The battery case (41) according to Claim 2.

4. The inner surface (11b) of the bottom plate (11) has a first protrusion (112) located on the opposite side of the first groove (111). The battery case (41) according to Claim 3.

5. A plurality of the first grooves (111) are provided, and the plurality of first grooves (111) are arranged at intervals along a first direction (x), and the longitudinal direction of the first groove (111) is parallel to a second direction (y). The first direction (x) is perpendicular to the second direction (y), and both the first direction (x) and the second direction (y) are parallel to the outer surface (11a) of the bottom plate (11). The battery case (41) according to Claim 3.

6. In the height direction (z) of the case body (10), the outer surface (11a) of the bottom plate (11) is lower than the geometric center (22) of the first pressure relief mechanism (20), and the ratio W / H of the distance W from the outer surface (11a) of the bottom plate (11) to the geometric center (22) of the first pressure relief mechanism (20) to the height H of the case body (10) satisfies W / H≧0.

001. The battery case (41) according to Claim 2.

7. Further includes a support bar (30) installed on the inner surface (11b) of the bottom plate (11) and configured to support the battery cell (42) installed in the accommodation space, In the height direction (z) of the case body (10), the support bar (30) is higher than the first protrusion (112). The battery case (41) according to Claim 4.

8. A plurality of the support bars (30) are provided, and the plurality of support bars (30) are arranged at intervals along a first direction (x) parallel to an outer surface (11a) of the bottom plate (11), and the first protrusion (112) is located between two adjacent support bars (30). The battery case (41) according to claim 7.

9. The support bar (30) has a cavity (33), and a plurality of first through holes (31) penetrating the cavity (33) are formed on an upper surface of the support bar (30) for supporting a battery cell (42), and a plurality of second through holes (32) penetrating the cavity (33) are formed on at least one side surface of the support bar (30) connected to the upper surface. The battery case (41) according to claim 7.

10. The at least one side wall includes at least one side plate (12) of the case body (10), and the first pressure relief mechanism (20) is installed on the at least one side plate (12). The battery case (41) according to claim 1.

11. An outer surface (12a) of the side plate (12) has a second groove (121), and the first pressure relief mechanism (20) is fitted in the second groove (121). The battery case (41) according to claim 10.

12. The at least one side plate (12) includes two opposite side plates (12), at least two first pressure relief mechanisms (20) are installed, and the at least two first pressure relief mechanisms (20) are respectively installed on the two opposite side plates (12). The battery case (41) according to claim 10.

13. In the height direction (z) of the case body (10), a ratio W / H of a distance W from the outer surface (11a) of the bottom plate (11) to a geometric center (22) of the first pressure relief mechanism (20) to a height H of the case body (10) satisfies W / H < 1. The battery case (41) according to claim 2.

14. A battery (40), wherein the battery (40) comprises the battery case (41) according to any one of claims 1 to 13, and a plurality of battery cells (42) installed in the battery case (41). The battery (40).

15. The battery cell (42) has an electrode terminal (421) and a second pressure relief mechanism (422). In the height direction (z) of the case body (10), the minimum distance h between the second pressure relief port (422a) of the second pressure relief mechanism (422) and the electrode terminal (421) is greater than the minimum distance L between the second pressure relief port (422a) of the second pressure relief mechanism (422) and the inlet (25) of the first pressure relief mechanism (20) of the battery case (41). The battery (40) according to claim 14.

16. The battery (40) according to claim 15, wherein the first pressure relief mechanism (20) is located on the side where the second pressure relief mechanism (422) is away from the electrode terminal (421).

17. The second pressure relief mechanism (422) and the electrode terminal (421) are respectively located at the lower end and the upper end of the battery cell (42). The first pressure relief mechanism (20) is located on the bottom plate (11) of the case body (10). And in the height direction (z) of the case body (10), the inlet (25) of the first pressure relief mechanism (20) is lower than the second pressure relief port (422a) of the second pressure relief mechanism (422). The battery (40) according to claim 15.

18. The orthographic projection of the second pressure relief mechanism (422) of the battery cell (42) on the inner surface (11b) of the bottom plate (11) of the case body (10) does not overlap with the orthographic projection of the first pressure relief mechanism (20) on the inner surface (11b) of the bottom plate (11) of the case body (10). The battery (40) according to claim 15.

19. In the height direction (z) of the case body (10), the ratio L / S of the minimum distance L and the minimum distance S between the inlet (25) of the first pressure relief mechanism (20) and the electrode terminal (421) satisfies 0.001 ≦ L / S ≦ 1. The battery (40) according to claim 15.

20. A power consumption device, wherein the power consumption device includes the battery (40) according to claim 14, and the battery (40) is for providing electrical energy to the power consumption device. A power consumption device.

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