Batteries and electrical equipment

Abstract

The embodiment of the present application provides a battery and an electric device. The battery includes a battery cell having a pressure release mechanism on a first wall thereof, a thermal management member for adjusting the temperature of the battery cell, the thermal management member being attached to a second wall of the battery cell, the second wall being a thermal management member different from the first wall, and a bus member for electrically connecting electrode terminals of the battery cell, the electrode terminals being provided on a third wall of the battery cell, the third wall being a bus member different from the first wall. By providing the bus member and the thermal management member on a side different from the pressure release mechanism, it is possible to keep the exhaust of the battery cell away from the bus member when the pressure release mechanism is activated, thereby preventing a short circuit of the battery and avoiding the destruction of the thermal management member due to the exhaust of the battery cell, and thus the thermal management member can continuously and normally adjust the temperature of the battery cell, improving the safety of the battery.

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This application claims priority to International Application No. PCT / CN2022 / 071536, filed on January 12, 2022, entitled "Battery Housing, Battery, Electrical Device, and Battery Manufacturing Method and Apparatus," the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the field of battery technology, and in particular to batteries and electrical devices. [Background technology]

[0003] With the continuous advancement of battery technology, various new energy industries using batteries as energy storage devices are rapidly developing. In the development of battery technology, in addition to the improvement of battery performance, safety issues cannot be ignored. If the safety of a battery cannot be guaranteed, the battery cannot be used. Therefore, how to improve battery safety is an urgent technical issue that needs to be solved in battery technology. Summary of the Invention

[0004] The embodiments of the present application provide a battery and an electrical device that can improve the safety of the battery.

[0005] In a first aspect, a battery is provided, the battery including a battery cell, a bus member, and a thermal management member, wherein a first wall of the battery cell is provided with a pressure release mechanism, the thermal management member is used to regulate a temperature of the battery cell, the thermal management member is attached to a second wall of the battery cell, the second wall being different from the first wall, the bus member is used to electrically connect electrode terminals of the battery cell, and the electrode terminals are provided to a third wall of the battery cell, the third wall being different from the first wall.

[0006] In an embodiment of the present application, if a thermal runaway occurs in a battery cell, the pressure release mechanism releases the battery cell's waste away from the thermal management member, preventing the waste from easily breaking through the thermal management member. The thermal management member reduces the temperature of the battery cell where thermal runaway occurs, preventing thermal diffusion, and improving battery safety. Furthermore, the battery's bus members electrically connect the electrode terminals of the battery cells, and the electrode terminals are located on a third wall of the battery cell, which is different from the first wall. This allows the battery cell's waste to move away from the bus member when the pressure release mechanism is activated, preventing a short circuit between the bus members due to the waste, thereby preventing a short circuit in the battery and improving battery safety.

[0007] In some embodiments, the second wall is different from the third wall.

[0008] In the embodiment of the present application, since the electrode terminals and bus members are provided on one side of the third wall, if the thermal management member is provided on the same side, it must be positioned to avoid the area of ​​the bus members. Therefore, to make it easier to install the thermal management member, the thermal management member can be attached to a wall other than the third wall, which does not need to avoid the bus members, makes installation easier, and also increases the contact area between the thermal management member and the battery cells, which is more advantageous for temperature regulation.

[0009] In some embodiments, the area of ​​the second wall is greater than or equal to the area of ​​the first wall and / or the area of ​​the second wall is greater than or equal to the area of ​​the third wall.

[0010] In the embodiments of the present application, by setting the area of ​​the second wall to be not smaller than that of the first wall and / or the third wall, it is possible to ensure that the second wall is not too small, and further to ensure that the contact area between the second wall and the thermal management member is limited to the area of ​​the second wall and is not too small, thereby ensuring the temperature regulation effect of the battery cell.

[0011] In some embodiments, the second wall is the wall of the battery cell with the largest area.

[0012] In the embodiment of the present application, the second wall is limited to be the wall with the largest area of ​​the battery cell, so that the highest temperature regulation efficiency for the battery cell can be achieved in the most convenient manner.

[0013] In some embodiments, the battery further includes a housing including an electrical cavity for housing the battery cells and the thermal management member, and a collection cavity for collecting battery cell exhaust upon activation of the pressure release mechanism.

[0014] In the embodiments of the present application, when thermal runaway occurs in the battery cell, the collection cavity can collect the battery cell's exhaust, preventing the battery cell's exhaust from being directly discharged outside the housing, thereby preventing the explosive force generated when the pressure release mechanism is activated from destroying other components, and improving the safety of the battery.

[0015] In some embodiments, the housing further includes a first housing wall spaced apart from the first wall, with a gap between the first wall and the first housing wall to form at least a portion of the collection cavity.

[0016] In the embodiments of the present application, by forming at least a portion of the collection cavity in the gap between the first wall and the first housing wall, the collection cavity can be used to collect battery cell waste without adding any extra components, thereby simplifying the battery structure, increasing the volume utilization rate of the battery, increasing the collection efficiency of battery cell waste, and improving the safety of the battery.

[0017] In some embodiments, the minimum distance between the first wall and the first housing wall is 7 mm or greater.

[0018] In the embodiment of the present application, by limiting the minimum distance between the first wall and the first housing wall to 7 mm or more, sufficient deformation space can be left for the pressure release mechanism, so that the exhaust of the battery cell can be released in a timely manner, thereby reducing the pressure or temperature inside the battery cell; sufficient release space can also be left for the exhaust released from the battery cell when the pressure release mechanism is activated, preventing the exhaust of the battery cell from accumulating excessively and contacting and affecting adjacent battery cells, thereby improving the safety of the battery.

[0019] In some embodiments, the minimum distance between the first wall and the first housing wall is between 7 mm and 25 mm.

[0020] In the embodiment of the present application, by limiting the minimum distance between the first wall and the first housing wall to 7 mm to 25 mm, it is possible not only to reduce the effect of external forces on the battery cell, but also to leave sufficient space for the operation of the pressure release mechanism and for waste materials released from the battery cell, and to improve the volume utilization rate of the battery and increase the energy density of the battery.

[0021] In some embodiments, the battery further includes an isolation member attached to the first wall and used to isolate the electrical cavity from the collection cavity, which can prevent at least a portion of the effluent from entering the electrical cavity from the collection cavity and avoid thermal diffusion.

[0022] In some embodiments, the housing further includes a second housing wall secured to the third wall and used to secure the battery cells to the housing.

[0023] In the embodiments of the present application, the fixing of the second housing wall and the third wall can realize the fixing of the battery cells, prevent the battery cells from shaking within the housing due to the influence of the external environment, and improve the stability and safety of the battery. Furthermore, without adding any other components, a gap can be formed between the first wall of the battery cells and the housing wall, and the gap can be used to form at least a part of a collection cavity for collecting waste from the battery cells, thereby improving the volume utilization rate of the battery and increasing the energy density of the battery.

[0024] In some embodiments, the third wall is secured to the second housing wall by an adhesive.

[0025] In the embodiment of the present application, adhesive has the advantages of low cost and easy availability, so by fixing the third wall and the second housing wall with adhesive, the difficulty of fixing is reduced and the manufacturing cost of the battery is reduced. In addition, in the actual manufacturing process of the battery, adhesive can be applied to a partial area of ​​the third wall, and adhesive can also be applied to a partial area of ​​the second housing wall, so the fixing method of the third wall and the second housing wall is more flexible.

[0026] In some embodiments, the battery includes a plurality of rows of battery cells arranged along a first direction, and each row of the plurality of rows of battery cells includes at least one battery cell arranged along a second direction, the first direction being perpendicular to the second direction and the second wall. By arranging the plurality of battery cells in the battery in an array in this manner, assembly of the battery can be facilitated and space utilization of the plurality of battery cells in the battery can also be improved.

[0027] In some embodiments, the thermal management member is attached to a second wall of at least one battery cell in at least one row of battery cells in the plurality of rows of battery cells.

[0028] In the embodiments of the present application, the manufacturing costs of the battery can be reduced by attaching the thermal management member to the second wall of at least one battery cell in at least one row of battery cells among the plurality of rows of battery cells.

[0029] In some embodiments, the battery cell includes two second walls arranged opposite to each other along the first direction, and at least one of the rows of battery cells has a thermal management element attached to the two second walls of the at least one battery cell on both sides along the first direction of the battery cells in at least one row of the plurality of rows of battery cells. In this way, by simultaneously adjusting the temperature of the battery cells in one row with the two thermal management elements, it is possible to increase the temperature adjustment efficiency and improve the safety of the battery.

[0030] In some embodiments, identical thermal management members are provided between adjacent battery cells in at least two rows of the battery cells, thereby improving the temperature regulation effect.

[0031] In some embodiments, the battery includes a plurality of thermal management elements arranged along the first direction, which can further improve the temperature regulation effect.

[0032] In some embodiments, the thermal management elements are spaced apart along the first direction, which can improve not only the volume utilization rate of the battery but also the temperature regulation efficiency.

[0033] In some embodiments, the heat management members are provided with heat exchange channels for containing a heat exchange medium, and the heat exchange channels of multiple heat management members are in communication with one another.

[0034] In the embodiments of the present application, multiple thermal management elements are connected to each other, which, on the one hand, facilitates management and control and improves the integrity and safety of the battery; and, on the other hand, when the temperature of a portion of the thermal management element in the battery changes significantly, the heat exchange channel can realize heat exchange, thereby reducing the temperature difference between the multiple thermal management elements and improving the temperature adjustment efficiency.

[0035] In some embodiments, the plurality of thermal management elements include adjacent first and second thermal management elements, the first thermal management element including a first connecting tube communicating with the heat exchange channel, the second thermal management element including a second connecting tube communicating with the heat exchange channel, and the first and second connecting tubes connected to each other such that the heat exchange channel of the first thermal management element and the heat exchange channel of the second thermal management element are in communication with each other.

[0036] In the embodiments of the present application, by connecting the heat exchange channels between adjacent first and second thermal management members through the first connecting pipe and the second connecting pipe, the difficulty of connecting the heat exchange channels can be reduced, and by arranging the members connected to the heat exchange channels together with the first and second thermal management members, the volume utilization rate of the battery can be improved, thereby increasing the energy density of the battery.

[0037] In some embodiments, the first connecting pipe is provided in an area extending beyond one row of battery cells along the second direction of the first thermal management member, and the second connecting pipe is provided in an area extending beyond one row of battery cells along the second direction of the second thermal management member, the one row of battery cells being a row of battery cells between the first thermal management member and the second thermal management member, and the first connecting pipe and the second connecting pipe extend along the first direction and are connected to each other.

[0038] In the embodiments of the present application, by extending the first connecting pipe and the second connecting pipe along the first direction and connecting them to each other, the transport path of the heat exchange medium in the heat exchange channel of the first heat management member and the heat exchange channel of the second heat management member can be shortened, which not only increases the transport efficiency of the heat exchange medium in the corresponding heat exchange channel, but also improves the volume utilization rate of the battery.

[0039] In some embodiments, the housing further comprises a support member for supporting the first connecting pipe and / or the second connecting pipe.

[0040] In an embodiment of the present application, by supporting the first connecting pipe and / or the second connecting pipe with the support member, a gap may be formed between a row of battery cells located between the first thermal management member and the second thermal management member and the wall of the housing without adding any other member. For example, a gap may be formed between a first wall of a row of battery cells and any wall of the housing, and the gap may be used to form at least a part of a collection cavity so that the collection cavity collects waste from the battery cells. This improves the volume utilization rate of the battery and increases the energy density of the battery.

[0041] In some embodiments, one side of the support member along a third direction is used to attach the first connecting pipe and / or the second connecting pipe, and the third direction is perpendicular to the first direction and the second direction.

[0042] In the embodiments of the present application, by attaching the first connecting pipe and / or the second connecting pipe to one side of the support member along the third direction, the space in the third direction of the battery can be utilized to improve the volume utilization rate of the battery.In addition, when assembling the battery, the support member can be provided and the first connecting pipe and / or the second connecting pipe can be attached while the first connecting pipe and the second connecting pipe are in communication with each other.It is also possible to first provide the support member and attach the first connecting pipe or the second connecting pipe, and then communicate the first connecting pipe and the second connecting pipe, thereby increasing the flexibility of assembly.

[0043] In some embodiments, one side of the support member along the third direction is provided with an accommodation groove for accommodating at least a portion of the first connecting pipe and / or at least a portion of the second connecting pipe.

[0044] In an embodiment of the present application, by providing an accommodation groove on one side of the support member along the third direction for accommodating at least a portion of the first connecting pipe and / or at least a portion of the second connecting pipe, the support member more stably supports and fixes the first connecting pipe and / or the second connecting pipe, preventing the first connecting pipe, the second connecting pipe and the row of battery cells between them from shaking within the housing, thereby improving the stability and safety of the battery.

[0045] In some embodiments, the first wall is disposed opposite the third wall and the second wall is connected to the first and third walls, or the first wall is disposed opposite the second wall and the third wall is connected to the first and second walls.

[0046] In the embodiment of the present application, the first wall of the battery cell is provided corresponding to the third wall, so that the pressure release mechanism is separated from the bus member, and thus, when the pressure release mechanism is activated, the exhaust of the battery cell may be discharged away from the bus member, reducing the impact of the exhaust on the bus member and avoiding short-circuiting of the battery. Also, since the second wall is provided to connect the first wall and the third wall, the three walls may be different, and the thermal management member may be located on a different side from the pressure release mechanism and the bus member, thereby preventing the pressure release mechanism and / or the bus member from adversely affecting the thermal management member in an abnormal state.

[0047] Alternatively, by arranging the first wall of the battery cell opposite the second wall, the pressure release mechanism is spaced apart from the thermal management member, thereby allowing the discharged matter of the battery cell to be spaced apart from the thermal management member when the pressure release mechanism is activated, thereby avoiding damage to the thermal management member and further improving the safety of the battery. Also, since a third wall is provided to connect the first wall and the second wall, the three walls may be different, and the bus member may be located on a different side from the pressure release mechanism and the thermal management member, thereby preventing the pressure release mechanism and / or the thermal management member from adversely affecting the bus member in an abnormal state.

[0048] In a second aspect, there is provided an electrical device including a battery according to the first aspect, the battery being adapted to supply battery energy to the electrical device.

[0049] In some embodiments, the electrical device is a vehicle, a watercraft, or a spacecraft. [Brief explanation of the drawings]

[0050] In order to more clearly explain the technical solutions in the embodiments of the present application, the following briefly introduces the drawings necessary for the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on the drawings without any creative efforts.

[0051] [Figure 1] 1 is a structural schematic diagram of a vehicle disclosed in an embodiment of the present application. [Figure 2] 1 is a schematic exploded structural view of a battery disclosed in one embodiment of the present application. [Figure 3] 1 is a schematic side view of a battery cell disclosed in one embodiment of the present application. [Figure 4] 1 is a schematic exploded structural view of a battery cell disclosed in an embodiment of the present application; [Figure 5] 1 is a schematic side view of a battery disclosed in one embodiment of the present application. [Figure 6] FIG. 2 is a schematic exploded view of another battery disclosed in an embodiment of the present application. [Figure 7] FIG. 2 is a cross-sectional schematic view of another battery disclosed in one embodiment of the present application. [Figure 8] FIG. 2 is a schematic exploded view of a further battery disclosed in an embodiment of the present application. [Figure 9] FIG. 2 is a cross-sectional schematic view of yet another battery disclosed in one embodiment of the present application. [Figure 10] 1 is a partial cross-sectional schematic view of yet another battery disclosed in one embodiment of the present application. [Figure 11] FIG. 2 is another cross-sectional schematic view of yet another battery disclosed in an example of the present application. [Figure 12] FIG. 2 is another partial cross-sectional schematic view of yet another battery disclosed in one embodiment of the present application. [Figure 13] 1 is a partial schematic view of a thermal management member disclosed in one embodiment of the present application. [Figure 14] FIG. 2 is a partial schematic diagram of yet another battery disclosed in one embodiment of the present application. [Figure 15]FIG. 10 is a schematic diagram of a top view structure of a further alternative battery in which a first thermal management member and a second thermal management member are connected to each other in accordance with an embodiment of the present application. [Figure 16] FIG. 10 is a partial side schematic view of yet another battery disclosed in one embodiment of the present application. [Figure 17] FIG. 2 is another partial schematic view of yet another battery disclosed in one embodiment of the present application. [Figure 18] FIG. 2 is another cross-sectional schematic view of yet another battery disclosed in an embodiment of the present application. [Figure 19] FIG. 2 is another partial schematic view of yet another battery disclosed in one embodiment of the present application.

[0052] In the drawings, the drawings are not necessarily drawn to scale. DETAILED DESCRIPTION OF THE INVENTION

[0053] The embodiments of the present application will be described in more detail below with reference to the drawings and examples. The detailed description of the following examples and the accompanying drawings are used to exemplify the principles of the present application, but cannot be used to limit the scope of the present application, i.e., the present application is not limited to the examples described.

[0054] In the description of this application, unless otherwise specified, "plurality" means two or more, and orientations or positional relationships indicated by "up," "down," "left," "right," "inside," "outside," etc. are intended to facilitate and simplify the description of this application, but do not indicate or imply that the devices or elements shown must have a particular orientation or be configured and operated in a particular orientation, and therefore should not be understood as limiting this application. Furthermore, the terms "first," "second," and "third" are for illustrative purposes only and should not be understood as indicating or implying relative importance. "Perpendicular" does not mean perpendicular in the strict sense, but rather within a margin of error. "Parallel" does not mean parallel in the strict sense, but rather within a margin of error.

[0055] All directional terms appearing in the following description refer to the directions shown in the drawings and do not limit the specific structure of the present application. In the description of the present application, unless otherwise clearly specified and limited, the terms "attached," "coupled," "connected," and "fixed" should be understood in a broad sense, for example, they may be fixedly connected, detachably connected, integrally connected, directly connected, or indirectly connected via an intermediate medium. Those skilled in the art can understand the specific meanings of the above terms in the present application according to the specific circumstances.

[0056] In this application, 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., and the embodiments of this application are not limited thereto. The battery cell may have a cylindrical, flat, rectangular, or other shape, and the embodiments of this application are not limited thereto. Battery cells are generally divided into three types according to packaging methods: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the embodiments of this application are not limited thereto.

[0057] The battery referred to in the examples of this application refers to a single physical module containing one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may include a battery module or a battery pack. The battery typically includes a housing for enclosing one or more battery cells. The housing can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells.

[0058] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell operates primarily by relying on the movement of metal ions between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode current collector, and the current collector without the positive electrode active material layer protrudes from the current collector coated with the positive electrode active material layer and is used as a positive electrode tab. For example, in a lithium-ion battery, the positive electrode current collector may be made of aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector, and the current collector without the negative electrode active material layer protrudes from the current collector coated with the negative electrode active material layer and is used as a negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon or silicon, etc. To ensure that they do not melt even when a large current flows, multiple positive electrode tabs are stacked, and multiple negative electrode tabs are stacked. The material of the separator may be polypropylene (PP) or polyethylene (PE), etc. Furthermore, the electrode assembly may have a wound structure or a stacked structure, and the embodiments of the present application are not limited thereto.

[0059] With the development of battery technology, various design factors, such as performance parameters such as energy density, cycle life, discharge capacity, and charge / discharge ratio, must be considered simultaneously. Battery safety must also be considered. The main safety hazard in batteries occurs during the charge / discharge process. To improve battery safety, battery cells are typically equipped with a pressure release mechanism. The pressure release mechanism refers to an element or component that activates to release the internal pressure or temperature of the battery cell when the internal pressure or temperature reaches a predetermined threshold. The predetermined threshold can be adjusted according to design needs. For example, the predetermined threshold can depend on one or more materials among the positive electrode sheet, negative electrode sheet, electrolyte, and separator of the battery cell. The pressure release mechanism can use a pressure- or temperature-sensitive element or component. That is, when the internal pressure or temperature of the battery cell reaches a predetermined threshold, the pressure release mechanism activates, forming a channel for releasing the internal pressure or temperature. Furthermore, a thermal management component is typically attached to the surface of the battery cell to manage and regulate the temperature of the battery cell.

[0060] In related art, the thermal management member is typically attached to a wall where the pressure release mechanism of the battery cell is provided. This allows the thermal management member to regulate the temperature of the battery cell when the battery cell operates normally. However, if thermal runaway occurs in the battery cell, for example, if the pressure release mechanism of the battery cell is activated, the force and destructive power of the discharged material released by the pressure release mechanism of the battery cell is large and even sufficient to pierce the thermal management member. This reduces the effect of the thermal management member in regulating the temperature of the battery cell when thermal runaway occurs (for example, lowering the temperature of the battery cell where thermal runaway occurs), which may cause thermal diffusion of the battery.

[0061] In view of this, the present application provides a battery including a battery cell, a bus member, and a thermal management member. Here, a pressure release mechanism is provided on a first wall of the battery cell, and the thermal management member is attached to a second wall of the battery cell, which is different from the first wall. Thus, if thermal runaway occurs in the battery cell, exhaust from the battery cell discharged by the pressure release mechanism is discharged in a direction away from the thermal management member, and therefore the exhaust is less likely to penetrate the thermal management member. The thermal management member can lower the temperature of the battery cell in which thermal runaway occurs, avoid heat diffusion, and improve battery safety. Furthermore, the bus member of the battery electrically connects electrode terminals of the battery cell, and the electrode terminals are provided on a third wall of the battery cell, which is different from the first wall. Thus, when the pressure release mechanism is activated, exhaust from the battery cell is discharged away from the bus member, avoiding a short circuit between the bus members due to the exhaust, thereby preventing a short circuit in the battery and improving battery safety.

[0062] The technical solutions described in the embodiments of this application are applicable to various electric devices that use batteries. The electric devices may be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, electric tools, etc. The vehicles may be fuel-powered vehicles, gasoline-powered vehicles, or new energy vehicles, and the new energy vehicles may be pure electric vehicles, hybrid vehicles, or extended-range vehicles. The spacecraft and aircraft include airplanes, rockets, space shuttles, and spaceships. The electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric aircraft toys. The electric tools include metal cutting electric tools, polishing electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, electric impact drills, concrete vibrators, and electric planers. In the embodiments of this application, the electric devices are not particularly limited.

[0063] In the following embodiment, for ease of explanation, the electrical device will be described as a vehicle.

[0064] For example, FIG. 1 is a structural schematic diagram of a vehicle 1 in one embodiment of the present application. The vehicle 1 may be a fuel-powered vehicle, a gas-powered vehicle, or a new-energy vehicle, and the new-energy vehicle may be a pure electric vehicle, a hybrid vehicle, or a range-extending vehicle, etc. A motor 40, a controller 30, and a battery 10 may be provided inside the vehicle 1, and the controller 30 is used to control the battery 10 to supply power to the motor 40. For example, the battery 10 may be provided at the bottom, head, or rear of the vehicle 1. The battery 10 may be used to supply power to the vehicle 1. For example, the battery 10 may be used as an operating power source for the circuit system of the vehicle 1, for example, for operating power needs during startup, navigation, and operation of the vehicle 1. In another embodiment of the present application, the battery 10 may not only serve as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to supply driving power to the vehicle 1.

[0065] Figure 2 is a partially exploded schematic view of a battery 10 as described in an embodiment of the present application. Figure 3 is a side schematic view of a battery cell 20 as described in an embodiment of the present application.

[0066] 2 and 3 includes a battery cell 20, a thermal management member 13, and a bus member 12. Here, a pressure release mechanism 213 is provided on a first wall 21a of the battery cell 20, the thermal management member 13 is used to adjust the temperature of the battery cell 20, and the thermal management member 13 is attached to a second wall 21b of the battery cell 20, and the second wall 21b is different from the first wall 21a, the bus member 12 is used to electrically connect electrode terminals 214 of the battery cell 20, and the electrode terminals 214 are provided on a third wall 21c of the battery cell 20, and the third wall 21c is different from the first wall 21a.

[0067] The shape of the battery cell 20 in the embodiments of the present application may be set according to actual applications. The battery cell 20 may have a polyhedron structure, and the polyhedron structure may be surrounded by multiple walls, so that the battery cell 20 may include multiple walls. Here, a first wall 21a of the battery cell 20 is provided with a pressure release mechanism 213, and a second wall 21b of the battery cell 20 faces the thermal management member 13. The first wall 21a and the second wall 21b may be any two different walls of the battery cell 20, and the first wall 21a and the third wall 21c may also be any two different walls of the battery cell 20. For example, the first wall 21a and the second wall 21b may or may not intersect, and the first wall 21a and the third wall 21c may or may not intersect, and the embodiments of the present application are not limited thereto.

[0068] It should be understood that the pressure release mechanism 213 in the embodiments of the present application refers to an element or member that is activated to release the internal pressure or temperature of the battery cell 20 when the internal pressure or temperature reaches a predetermined threshold. The design of the predetermined threshold varies depending on design needs. The predetermined threshold may depend on one or more materials selected from the positive electrode sheet, the negative electrode sheet, the electrolyte, and the separator of the battery cell 20. The pressure release mechanism 213 may be directly mounted on the first wall 21a, or may be provided separately from the first wall 21a and fixed to the first wall 21a by welding, adhesion, or other methods.

[0069] It should be understood that regulating the temperature of the battery cells 20 by the thermal management member 13 may include heating or cooling the battery cells 20. For example, if the temperature of the battery cells 20 exceeds a predetermined threshold, lowering the temperature of the battery cells 20 can improve the safety of the battery, and heating the battery cells 20 before using the battery in some regions where temperatures are relatively low in winter can improve the performance of the battery.

[0070] In the embodiment of the present application, the thermal management member 13 is not fixedly attached to the second wall 21b of the battery cell 20. For example, the thermal management member can be attached to the second wall 21b of the battery cell 20 with an adhesive (e.g., a thermally conductive adhesive), or the thermal management member 13 can be sandwiched and fixed between two adjacent battery cells 20.

[0071] It should be understood that the battery cell 20 includes at least two electrode terminals 214, and the at least two electrode terminals 214 may be provided on at least the same third wall 21c or on different third walls 21c. In FIGS. 2 and 3, an example is shown in which the two electrode terminals 214 of the battery cell 20 are provided on the same third wall 21c. The bus member 12 can connect multiple battery cells 20 in series / parallel via the two electrode terminals 214. For example, a positive terminal 214a and a negative terminal 214b are provided on the third wall 21c of the battery cell 20, and the bus member 12 connects the positive terminal 214a and the negative terminal 214b of two adjacent battery cells 20, respectively, to connect the two adjacent battery cells 20 in series. For example, the bus member 12 connects the two positive terminals 214a of each of the two adjacent battery cells 20, respectively, to connect the two adjacent battery cells 20 in parallel.

[0072] In the embodiment of the present application, when thermal runaway occurs in the battery cell 20, the exhaust from the battery cell 20 discharged by the pressure release mechanism 213 is discharged in a direction away from the thermal management member 13, so that the exhaust does not easily penetrate the thermal management member 13. The thermal management member 13 can lower the temperature of the battery cell 20 where thermal runaway has occurred, avoid heat diffusion, and improve the safety of the battery 10. In addition, the bus member 12 of the battery 10 electrically connects the electrode terminals 214 of the battery cell 20, and the electrode terminals 214 are provided on the third wall 21c of the battery cell 20, which is different from the first wall 21a. As a result, when the pressure release mechanism 213 is activated, the exhaust from the battery cell 20 is discharged away from the bus member 12, avoiding a short circuit between the bus members 12 due to the exhaust, thereby preventing a short circuit in the battery 10 and improving the safety of the battery 10.

[0073] Optionally, in the embodiment of the present application, the third wall 21c is different from the second wall 21b, and for example, as shown in Figures 2 and 3, the first wall 21a, the second wall 21b, and the third wall 21c may be any three different walls of the battery cell 20.

[0074] Because the electrode terminals 214 and bus members 12 are provided on one side of the third wall 21c, if the thermal management member 13 is provided on the same side, it must be positioned to avoid the area of ​​the bus members 12. Therefore, to more easily provide the thermal management member 13, it can be attached to a wall other than the third wall 21c. This eliminates the need to avoid the bus members 12, makes attachment easier, and also increases the contact area between the thermal management member 13 and the battery cells 20, which is more advantageous for temperature regulation.

[0075] It should be noted that the contact area between the thermal management member 13 and the second wall 21b of the battery cell 20 in the embodiments of the present application may be set according to actual applications, and the contact area refers to the area of ​​the area where the thermal management member 13 exchanges heat with the second wall 21b of the battery cell 20, and the contact here can refer to direct contact between the thermal management member 13 and the second wall 21b, or can refer to indirect contact between the thermal management member 13 and the second wall 21b through thermally conductive adhesive, thermal pad, etc.

[0076] Alternatively, in the embodiment of the present application, the first wall 21a of the battery cell 20 is arranged opposite the third wall 21c, and the second wall 21b is connected to the first wall 21a and the third wall 21c, or the first wall 21a is arranged opposite the second wall 21b, and the third wall 21c is connected to the first wall 21a and the second wall 21b.

[0077] In the embodiment of the present application, the first wall 21a of the battery cell 20 is disposed opposite the third wall 21c, so that the pressure release mechanism 213 is spaced apart from the bus member 12, whereby, when the pressure release mechanism 213 is activated, exhaust from the battery cell 20 may be discharged away from the bus member 12, reducing the impact of the exhaust on the bus member 12 and avoiding short-circuiting of the battery 10. In addition, since the second wall 21b is provided to connect the first wall 21a and the third wall 21c, the three walls may be different, and the thermal management member 13 may be disposed on a different side from the pressure release mechanism 213 and the bus member 12, thereby preventing the pressure release mechanism 213 and / or the bus member 12 from adversely affecting the thermal management member 13 in an abnormal state.

[0078] Alternatively, by providing the first wall 21a of the battery cell 20 opposite the second wall 21b, the pressure release mechanism 213 is spaced apart from the thermal management member 13, so that when the pressure release mechanism 213 is activated, the discharged matter of the battery cell 20 can be spaced apart from the thermal management member 13, avoiding damage to the thermal management member 13 and further improving the safety of the battery 10. Also, since the third wall 21c is provided to connect the first wall 21a and the second wall 21b, the three walls may be different, and the bus member 12 may be located on a different side from the pressure release mechanism 213 and the thermal management member 13, thereby preventing the pressure release mechanism 213 and / or the thermal management member 13 from adversely affecting the bus member 12 in an abnormal state.

[0079] Optionally, in the embodiment of the present application, the area of ​​the second wall 21b is equal to or greater than the area of ​​the first wall 21a and / or equal to or greater than the area of ​​the third wall 21c. By setting the area of ​​the second wall 21b not smaller than the area of ​​the first wall 21a and / or the third wall 21c, it is possible to ensure that the second wall 21b is not too small, and further to ensure that the contact area between the second wall 21b and the thermal management member 13 is limited by the area of ​​the second wall 21b and is not too small, thereby ensuring the temperature regulation effect of the battery cell 20.

[0080] For example, the first wall 21a may be the wall with the smallest area of ​​the battery cell 20, and the second wall 21b may be the wall with the largest or largest area, which will increase the contact area between the thermal management member 13 and the battery cell 20 and improve the temperature regulation effect for the battery cell 20. Alternatively, the third wall 21c may be the wall with the smallest area, and the second wall 21b may be the wall with the largest or largest area, which will increase the contact area between the thermal management member 13 and the battery cell 20 and improve the temperature regulation effect for the battery cell 20. Furthermore, for example, the first wall 21a may be the wall with the smallest area, the third wall 21c may be the wall with a medium area, and the second wall 21b may be the wall with a medium or larger area, which will further increase the contact area between the thermal management member 13 and the battery cell 20 and significantly improve the temperature regulation effect for the battery cell 20; however, the embodiments of the present application are not limited thereto.

[0081] Optionally, in the embodiment of the present application, the second wall 21b is the wall of the battery cell 20 with the largest area.

[0082] For example, if the battery cell 20 has at least one wall with the largest area, the second wall 21b may be any one of the at least one wall with the largest area. The larger the contact area between the thermal management member 13 and the battery cell 20, the higher the temperature regulation effect for the battery cell 20. In this way, by attaching the thermal management member 13 to the wall with the largest area of ​​the battery cell 20, the highest temperature regulation efficiency for the battery cell 20 can be achieved in the most convenient manner.

[0083] For example, FIG. 4 is a schematic exploded view of a battery cell according to an embodiment of the present application. As shown in FIG. 4, the battery cell 20 includes a case 21, which may include multiple walls. The second wall 21b may be any wall on the case 21 other than the first wall 21a. For example, the battery cell 20 shown in FIG. 4 is an exploded view of any battery cell 20 of the battery 10 shown in FIGS. 2 and 3. In this case, as shown in FIGS. 2 to 4, the second wall 21b may be a wall with a small area on the case 21. Alternatively, unlike the position of the second wall 21b shown in FIG. 4, the second wall 21b in the embodiment of the present application may be a wall with the largest area on the case 21. The case 21 may also include at least two walls with the same area. For example, if the case 21 of the battery cell 20 is a rectangular parallelepiped, the case 21 may include two walls with the same area and the largest areas that are located opposite each other, and the second wall 21b may be any of these walls.

[0084] The case 21 may include a case body 211 and a cover plate 212. The walls of the case body 211 and the cover plate 212 are both referred to as walls of the battery cell 20. The shape of the case body 211 may be determined according to the combined shape of one or more electrode assemblies 22 therein. For example, the case body 211 may be a hollow rectangular parallelepiped, cube, or cylinder, and at least one surface of the case body 211 has an opening so that one or more electrode assemblies 22 can be disposed within the case body 211. For example, if the case body 211 is a hollow rectangular parallelepiped or cube, at least one surface of the case body 211 is an open surface, i.e., the surface has no walls, and the interior and exterior of the case body 211 are in communication. If the case body 211 is a hollow cylinder, each of the two end surfaces of the case body 211 may be an open surface, i.e., the end surface has no walls, and the interior and exterior of the case body 211 are in communication. At least one cover plate 212 can be provided to cover at least one opening of the case body 211, and each cover plate 212 is connected to the case body 211 to form a sealed cavity for accommodating the electrode assembly 22. The case body 211 is filled with an electrolyte such as an electrolyte solution.

[0085] In the embodiment of the present application, the first wall 21a of the battery cell 20 is provided with a pressure release mechanism 213, which is activated to release the internal pressure or temperature of the battery cell 20 when the internal pressure or temperature of the battery cell 20 reaches a threshold. Optionally, the first wall 21a may be any wall of the battery cell 20. For example, the first wall 21a may be the wall with the largest area of ​​the battery cell 20. In this manner, since the area of ​​the second wall 21b is equal to or greater than the area of ​​the first wall 21a, the first wall 21a and the second wall 21b may have the same area and both are the walls with the largest area of ​​the battery cell 20. Alternatively, for example, the first wall 21a may be the wall with the smallest area of ​​the battery cell 20. For example, the first wall 21a may be the bottom wall of the case body 211 to facilitate installation. For ease of illustration, in FIG. 4, the first wall 21a is separated from the case body 211, but this does not limit whether or not there is an opening on the bottom side of the case body 211; that is, the bottom wall and the side wall of the case body 211 may be an integral structure, or may be two independent parts connected to each other.

[0086] 4 , the pressure release mechanism 213 may be a part of the first wall 21a, or may be a separate structure from the first wall 21a, for example, by being fixed to the first wall 21a by welding. When the pressure release mechanism 213 is a part of the first wall 21a, i.e., when the pressure release mechanism 213 can be formed integrally with the first wall 21a, the pressure release mechanism 213 may be formed by providing scores or grooves in the first wall 21a. The scores make the thickness of the area of ​​the first wall 21a where the pressure release mechanism 213 is located thinner than the thickness of the area of ​​the first wall 21a other than the pressure release mechanism. Because the wall thickness at the score positions is thinner than the wall thickness of the first wall 21a other than the scores, a large amount of gas is generated inside the battery cell 20. When the internal pressure rises to a predetermined threshold or the internal heat of the battery cell 20 rises to a predetermined threshold, the wall at the score positions and the wall adjacent to the score positions rupture, thereby releasing the pressure and heat inside the battery cell 20.

[0087] Optionally, the pressure release mechanism 213 of the embodiment of the present application may be various possible pressure release structures, and the embodiment of the present application is not limited thereto. For example, the pressure release mechanism 213 may be a temperature-sensitive pressure release mechanism configured to melt when the internal temperature of the battery cell 20 provided with the pressure release mechanism 213 reaches a threshold, and / or the pressure release mechanism 213 may be a pressure-sensitive pressure release mechanism configured to burst when the internal air pressure of the battery cell 20 provided with the pressure release mechanism 213 reaches a threshold.

[0088] 4, for example, the battery cell 20 includes two electrode terminals 214, and these two electrode terminals 214 are provided on a plate-shaped cover plate 212, that is, the cover plate 212 is the third wall 21c of the battery cell 20. These at least two electrode terminals 214 may include at least one positive terminal 214a and at least one negative terminal 214b.

[0089] The electrode terminals 214 in the embodiment of the present application are electrically connected to the electrode assembly 22 and are used to output electrical energy. For example, each electrode terminal 214 may be provided with a corresponding current collecting member 23, which is located between the cover plate 212 and the electrode assembly 22 and is used to electrically connect the electrode assembly 22 and the electrode terminal 214.

[0090] As shown in FIG. 4 , each electrode assembly 22 has a first tab 221a and a second tab 222a. The polarities of the first tab 221a and the second tab 222a are opposite. For example, if the first tab 221a is a positive electrode tab, the second tab 222a is a negative electrode tab. The first tab 221a of one or more electrode assemblies 22 is connected to one electrode terminal via one current collecting member 23, and the second tab 222a of one or more electrode assemblies 22 is connected to another electrode terminal via another current collecting member 23. For example, the positive electrode terminal 214a is connected to the positive electrode tab via one current collecting member 23, and the negative electrode terminal 214b is connected to the negative electrode tab via another current collecting member 23.

[0091] In the battery cell 20, the electrode assembly 22 may be configured as a single or multiple electrode assemblies 22 according to actual usage needs. As shown in FIG. 4, the battery cell 20 is provided with four electrode assemblies 22, but the embodiments of the present application are not limited thereto.

[0092] Optionally, as shown in FIG. 4 , the battery cell 20 may further include a backing plate 24. The backing plate 24 is located between the electrode assembly 22 and the bottom wall of the case body 211 to support the electrode assembly 22 and effectively prevent the electrode assembly 22 from interfering with the rounded corners around the bottom wall of the case body 211. The backing plate 24 may also have one or more through-holes, such as a uniformly arranged plurality of through-holes. Alternatively, if a pressure release mechanism 213 is provided in the bottom wall of the case body 211, a through-hole may be provided at a position corresponding to the pressure release mechanism 213 to facilitate the guide of liquid and gas. Specifically, this allows the spaces between the upper and lower surfaces of the backing plate 24 to communicate with each other, allowing gas and electrolyte generated inside the battery cell 20 to freely pass through the backing plate 24.

[0093] Fig. 5 is a partial cross-sectional schematic view of a battery 10 according to an embodiment of the present application. For example, the partial cross-sectional schematic view shown in Fig. 5 may be a partial cross-sectional schematic view along a direction perpendicular to the first direction X of the battery 10 shown in Fig. 2, where the first direction X may be the arrangement direction of the multiple battery cells 20 in the battery 10. The battery 10 shown in Fig. 5 further includes a housing 11 including an electrical cavity 111 for accommodating the battery cells 20 and the thermal management member 13, and a collection cavity 112 for collecting waste from the battery cells 20 when the pressure release mechanism 213 is activated.

[0094] It should be understood that the electrical cavity 111 in the embodiments of the present application may be used to house the battery cells 20 and the thermal management members 13, and there is no limit to the number of the housed battery cells 20 and the thermal management members 13. The electrical cavity 111 may also be provided with a structure for fixing the battery cells 20 and / or the thermal management members 13.

[0095] Optionally, the shape of the electrical cavity 111 may be determined depending on the housed battery cells 20 and / or thermal management members 13. For example, as shown in Figures 2 to 5, the electrical cavity 111 may be a hollow rectangular parallelepiped surrounded by at least six walls for ease of processing.

[0096] It should be understood that the collection cavity 112 in the embodiment of the present application is used to collect the effluent of the battery cells 20. Specifically, the collection cavity 112 may contain air or other gas. Alternatively, the collection cavity 112 may contain a liquid such as a cooling medium, or a member for containing the liquid may be provided to further reduce the temperature of the effluent entering the collection cavity. Furthermore, optionally, the gas or liquid in the collection cavity 112 may circulate.

[0097] It should be understood that the electrical cavity 111 in the embodiments of the present application may be sealed or non-sealed, and similarly, the collection cavity 112 in the embodiments of the present application may be sealed or non-sealed, and the embodiments of the present application are not limited thereto.

[0098] Therefore, in the battery 10 of the embodiment of the present application, if thermal runaway occurs in the battery cell 20, the collection cavity 112 can collect the exhaust from the battery cell 20, preventing the exhaust from the battery cell 20 from being directly released outside the housing 11, thereby preventing the explosive force generated when the pressure release mechanism 213 is activated from destroying other components, and improving the safety of the battery 10.

[0099] It should be understood that the collection cavity 112 in the embodiments of the present application may be implemented in a variety of ways.

[0100] Optionally, in an embodiment of the present application, as shown in Figures 2 to 5, the housing 11 further includes a first housing wall 114 opposed to and spaced apart from the first wall 21a, with a gap 113 between the first wall 21a and the first housing wall 114 to form at least a portion of the collection cavity 112. For example, the first wall 21a may not be at least partially in contact with the first housing wall 114 to form the gap 113.

[0101] In an embodiment of the present application, by forming at least a portion of the collection cavity 112 in the gap 113 between the first wall 21a and the first housing wall 114, the collection cavity 112 can collect the waste from the battery cells 20 without adding any extra components, thereby simplifying the structure of the battery 10, increasing the volume utilization rate of the battery 10, increasing the efficiency of collecting waste from the battery cells 20, and improving the safety of the battery 10.

[0102] In some embodiments of the present disclosure, as shown in FIGS. 2 to 5, the minimum distance L between the first wall 21a and the first housing wall 114 is 7 mm or greater.

[0103] Here, the minimum distance L between the first wall 21a and the first housing wall 114 may be the minimum distance L among the distances from different points on the first wall 21a to the first housing wall 114. For example, when the pressure release mechanism 213 is provided directly on the first wall 21a of the battery cell 20 in the form of a score, the minimum distance L between the first wall 21a and the first housing wall 114 is the distance from any point in the non-scored area on the first wall 21a to the first housing wall 114, and is 7 mm or more.

[0104] It should be noted that when there is an area of ​​mutual contact between the first wall 21a and the first housing wall 114, for example when the first wall 21a and the first housing wall 114 are contacted by a connecting member, the minimum distance L between the first wall 21a and the first housing wall 114 is the minimum distance L from any point on the first wall 21a that is not in contact with the first housing wall 114 to the first housing wall 114.

[0105] In the embodiment of the present application, by limiting the minimum distance L between the first wall 21a and the first housing wall 114 to 7 mm or more, sufficient deformation space can be left for the pressure release mechanism 213, and the exhaust of the battery cell 20 can be released in a timely manner, thereby reducing the pressure or temperature inside the battery cell 20; sufficient release space can be left for the exhaust released from the battery cell 20 when the pressure release mechanism 213 is activated, preventing the exhaust of the battery cell 20 from accumulating excessively and contacting and affecting the adjacent battery cell 20, and improving the safety of the battery 10.

[0106] In some embodiments of the present application, the minimum distance L between the first wall 21a and the first housing wall 114 is 7 mm to 25 mm. For example, the minimum distance L between the first wall 21a and the first housing wall 114 is 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, and 25 mm.

[0107] It can be understood that the greater the minimum distance L between the first wall 21a and the first housing wall 114, the easier it is for the exhaust of the battery cell 20 to be released when the pressure release mechanism 213 is activated. However, the greater the minimum distance L between the first wall 21a and the first housing wall 114, the greater the volume of the collection cavity 112, which reduces the volume utilization rate of the battery 10 and the energy density of the battery 10.

[0108] In the embodiment of the present application, by limiting the minimum distance L between the first wall 21a and the first housing wall 114 to 7 mm to 25 mm, it is possible not only to reduce the effect of external forces on the battery cell 20, but also to leave sufficient space for the operation of the pressure release mechanism 213 and for waste materials released from the battery cell 20, and to improve the volume utilization rate of the battery 10 and increase the energy density of the battery 10.

[0109] Fig. 6 is a diagram showing a battery 10 according to another embodiment of the present application. Fig. 7 is a partial cross-sectional schematic view of a battery 10 according to another embodiment of the present application. For example, Fig. 7 may be a cross-sectional schematic view of a portion of the battery 10 shown in Fig. 6 perpendicular to the first direction X. Here, the first direction X is the same as the first direction X in the above embodiment.

[0110] As shown in FIGS. 6 and 7, the battery 10 further includes an isolation member 15 attached to the first wall 21 a and used to isolate the electrical cavity 111 and the collection cavity 112 .

[0111] It should be understood that "isolated" here refers to separation and does not necessarily mean sealing. Specifically, the electrical cavity 111 and the collection cavity 112 are isolated by the isolation member 15, that is, the electrical cavity 111 for accommodating the battery cells 20 and the thermal management member 13 and the collection cavity 112 for collecting effluent are spatially separated from each other, thereby preventing at least a portion of the effluent from entering the collection cavity 112 into the electrical cavity 111 and avoiding thermal diffusion.

[0112] In the embodiment of the present application, the isolation member 15 includes a wall common to the electrical cavity 111 and the collection cavity 112. As shown in Figures 6 and 7, the isolation member 15 (or a part thereof) can directly function as a wall common to the electrical cavity 111 and the collection cavity 112, thereby making it possible to minimize the distance between the electrical cavity 111 and the collection cavity 112, thereby saving space and improving the volume utilization rate of the housing 11.

[0113] In the housing 11 of the embodiment of the present application, the electrical cavity 111 and the collection cavity 112 may be realized by the isolation member 15 in various ways, but the embodiment of the present application is not limited thereto. For example, referring to Figures 6 and 7, for the electrical cavity 111, the housing 11 may include a first cover having an opening, and the isolation member 15 covers the opening of the first cover to form the electrical cavity 111. In this way, the wall for forming the electrical cavity 111 includes the first cover and the isolation member 15. Here, the first cover may be realized in various ways. For example, the first cover may be a hollow, one-piece structure with an open end, or the first cover may include a first portion 111a and a second portion 112b with openings on opposite sides, where the first portion 111a covers the opening on one side of the second portion 112b to form the open-ended first cover, and the isolation member 15 covers the opening on the other side of the second portion 112b to form the electrical cavity 111. As shown in Figures 6 and 7, the housing 11 further includes a protective member 113c for forming the collection cavity 112 together with the isolation member 15. The protective member 113c may also be used to protect the isolation member 15, i.e., the wall of the collection cavity 112 includes the protective member 113c and the isolation member 15.

[0114] 6 and 7, the housing 11 may also include a closed second cover, which may be used to form the electrical cavity 111, or an isolation member 15 may be provided in the second cover to isolate the electrical cavity 111 and further isolate the collection cavity 112. Here, the second cover may be realized in various ways, for example, the second cover may include a third part and a fourth part, with an opening on one side of the fourth part to form a semi-closed structure, the isolation member 15 provided inside the fourth part, the third part covering the opening of the fourth part, and further forming a closed second cover.

[0115] In the embodiment of the present application, the isolation member 15 is provided with a pressure release area 151, which is used to discharge effluent through the pressure release area 151 into the collection cavity 112 when the pressure release mechanism 213 is activated, thereby preventing destructive damage to other battery cells 20 in the electrical cavity 111 due to the effluent, preventing heat diffusion, and improving the safety of the battery 10. Optionally, the isolation member 15 also includes a non-pressure release area 152, which is an area on the isolation member 15 other than the pressure release area 151. For example, an adhesive (not shown) can be applied to the non-pressure release area 152 to fix the battery cell 20 and the isolation member 15, i.e., to bond and fix the first wall 21 a of the battery cell 20 to the isolation member 15.

[0116] It should be understood that the pressure release region 151 of the isolation member 15 in the embodiments of the present application may be realized in various ways. For example, the pressure release region 151 of the isolation member 15 does not need to be subjected to any special treatment, and the embodiments of the present application refer to only the portion of the isolation member 15 facing the pressure release mechanism 213, distinguishing this portion and calling it the pressure release region 151.

[0117] Also, for example, pressure relief area 151 of isolation member 15 may be specially treated to more easily break when pressure relief mechanism 213 is activated.

[0118] As one example, the pressure release area 151 is a weakened area that can be broken when the pressure release mechanism 213 is activated, allowing waste to pass through the weakened area and enter the collection cavity 112. By configuring the pressure release area 151 as a weakened area, when the pressure release mechanism 213 is not activated, for example, during normal use of the battery 10, the isolation member 15 is relatively sealed, effectively protecting the pressure release mechanism 213 from being broken and damaged by external forces. Furthermore, when the pressure release mechanism 213 is activated, the strength of the weakened area is weaker than the strength of areas of the isolation member 15 other than the pressure release area 151, so the weakened area is easily broken. As a result, waste from the battery cell 20 provided with the pressure release mechanism 213 can be discharged from the electrical cavity 111 through the weakened area and, for example, pass through the weakened area and enter the collection cavity 112.

[0119] As another example, the pressure relief area 151 may be a through-hole, which is used to allow effluent to pass through the through-hole and enter the collection cavity 112 when the pressure relief mechanism 213 is activated. If the pressure relief area 151 is a through-hole, it is easier to process, and on the other hand, the effluent discharged by the pressure relief mechanism 213 can be released more quickly.

[0120] Above, several possible implementations of the electrical cavity 111 and the collecting cavity 112 in the embodiments of the present application have been described with reference to the drawings. For ease of explanation, the following description will mainly focus on the case where the isolation member 15 is not provided, but the embodiments of the present application are not limited thereto.

[0121] Fig. 8 is a partially exploded view of a battery 10 according to yet another embodiment of the present application. Fig. 9 is a partial cross-sectional schematic view of a battery 10 according to yet another embodiment of the present application. For example, Fig. 9 may be a cross-sectional schematic view of a portion of the battery 10 shown in Fig. 8 perpendicular to the first direction X. Here, the first direction X is the same as the first direction X in the above embodiment.

[0122] As shown in Figures 8 and 9, the housing 11 further includes a second housing wall 115, which is fixed to the third wall 21c and is used to secure the battery cell 20 to the housing 11.

[0123] In the embodiment of the present application, the fixing of the second housing wall 115 and the third wall 21c can realize the fixing of the battery cell 20, which not only prevents the battery cell 20 from shaking within the housing due to the influence of the external environment and improves the stability and safety of the battery 10, but also allows a gap to be formed between the first wall 21a of the battery cell 20 and the wall of the housing 11 without adding any other parts, and the gap can be used to form at least a part of a collection cavity for collecting waste from the battery cell 20, thereby improving the volume utilization rate of the battery 10 and increasing the energy density of the battery 10.

[0124] The second housing wall 115 and the third wall 21c may be directly fixed to each other or indirectly fixed to each other by a fixing member, which may include, but is not limited to, a bolt, an engagement groove, etc.

[0125] The second housing wall 115 and the third wall 21c are described as being directly fixed to each other. For example, there is a magnetic material on the side of the second housing wall 115 that is closer to the third wall 21c, and there is also a magnetic material on the side of the third wall 21c that is closer to the second housing wall 115. The magnetic force between the magnetic materials fixes the second housing wall 115 to the third wall 21c, thereby realizing the fixation of the battery cell 20 to the housing 11.

[0126] Optionally, the second housing wall 115 and the third wall 21c may be fixed in other ways. Figure 10 is a partial enlarged view of area B in Figure 9. Optionally, in the embodiment of the present application, the third wall 21c is fixed to the second housing wall 115 by adhesive 17 to facilitate processing.

[0127] For example, adhesive 17 may be applied to an area on the third wall 21c where the electrode terminals 214 are not provided, and the third wall 21c may be fixed to the second housing wall 115. Illustratively, the adhesive 17 may be a thermally conductive silica gel, an epoxy resin adhesive, a polyurethane adhesive, or the like.

[0128] Optionally, in the embodiment of the present application, the battery cell 20 and the housing 11 can be fixed to each other by other walls, similar to the third wall 21c and the second housing wall 115. For example, the battery cell 20 and the housing 11 can be fixed to each other by the first wall 21a of the battery cell 20 and the first housing wall 114 of the housing 11, and for example, the first wall 21a and the first housing wall 114 may be connected by a connecting member (e.g., adhesive).

[0129] In the embodiment of the present application, adhesive 17 has the advantages of being low cost and easily available, so by fixing third wall 21c and second housing wall 115 with adhesive 17, the degree of difficulty in fixing them is reduced, thereby reducing the manufacturing cost of battery 10. Furthermore, in the actual manufacturing process of battery 10, adhesive 17 can be applied to a partial area of ​​third wall 21c, or adhesive 17 can be applied to a partial area of ​​second housing wall 115, which increases the flexibility of the fixing method for third wall 21c and second housing wall 115.

[0130] Fig. 11 is yet another partial cross-sectional schematic view of a battery 10 according to yet another embodiment of the present application. For example, Fig. 11 may be a cross-sectional schematic view of a portion of the battery 10 shown in Fig. 8 taken perpendicular to the first direction X. Fig. 12 is a partial enlarged view of region C in Fig. 11. As shown in Figs. 11 and 12, adhesive 17 may be applied to a portion of the first wall 21a other than the pressure release mechanism 213, with a thickness corresponding to the thickness of the adhesive 17, and the first wall 21a of the battery cell 20 may be fixed to the first housing wall 114 with the adhesive 17, thereby achieving fixation of the battery cell 20 to the housing 11.

[0131] Furthermore, a gap 113 may be left between the area of ​​the first wall 21a where the adhesive 17 is not applied and the first housing wall 114. The gap 113 forms at least a part of the collection cavity 112. When the pressure release mechanism 213 is activated, the adhesive 17 does not affect the operation of the pressure release mechanism 213, so that the discharged matter from the battery cell 20 may be directly discharged into the collection cavity 112 through the pressure release mechanism 213. Here, the thickness of the adhesive 17 is related to the size of the gap 113; the thicker the adhesive 17, the larger the gap 113, and the larger the capacity of the collection cavity 112 to accommodate the discharged matter. In this way, the capacity of the collection cavity 112 can be adjusted according to the thickness of the adhesive 17, which makes the installation of the collection cavity 112 more flexible.

[0132] Optionally, in an embodiment of the present application, as shown in FIGS. 8 to 12 , the battery 10 includes a plurality of rows of battery cells 20 arranged along a first direction X, and each row of the battery cells 20 includes at least one battery cell 20 arranged along a second direction Y, and the first direction X is perpendicular to the second direction Y and the second wall 21 b.

[0133] For example, in the battery 10 shown in FIGS. 8 to 12, the battery cells 20 are arranged in 18 rows along the first direction X, and each row of the battery cells 20 includes six battery cells 20.

[0134] It can be understood that the number of battery cells 20 is set according to actual needs. The greater the number of battery cells 20, the greater the output power of the battery 10, and the fewer the number of battery cells 20, the smaller the output power of the battery. This allows multiple rows of battery cells 20 to be arranged in the first direction X, with each row of battery cells 20 having at least one battery cell 20 arranged along the second direction Y. Furthermore, because the multiple battery cells 20 of these batteries 10 are arranged in an array, assembly of the battery 10 is facilitated and the volume utilization rate of the multiple battery cells 20 within the battery can be improved. Here, because the first direction X is perpendicular to the second wall 21b, when the thermal management member 13 is attached to the second wall 21b, the first direction X is also perpendicular to the thermal management member 13.

[0135] It should be understood that the first direction X and the second direction Y in the embodiments of the present application are perpendicular to each other. For example, as shown in Figures 8 to 12, in the embodiments of the present application, the first direction X is the width direction of the battery cell 20, and the second direction Y is the length direction of the battery cell 20, where both the width direction and the length direction of the battery cell 20 are perpendicular to the height direction of the battery cell 20, and the length of the width direction side of the battery cell 20 is shorter than the length of the length direction side.

[0136] Optionally, the thermal management member 13 is attached to the second wall 21b of at least one battery cell 20 in at least one row of the plurality of rows of battery cells 20. For the plurality of rows of battery cells 20, a thermal management member 13 is provided corresponding to at least one battery cell 20 in the at least one row of battery cells 20, and the thermal management member 13 can regulate the temperature of the at least one battery cell 20 to which it is attached. In this way, the battery 10 has at least one thermal management member 13 that can be used to regulate the temperature of the at least one battery cell 20.

[0137] In an embodiment of the present application, the manufacturing cost of the battery 10 can be reduced by attaching the thermal management member 13 to the second wall 21b of at least one battery cell 20 in at least one row of the battery cells 20.

[0138] In the embodiment of the present application, the battery cells 20 include two second walls 21b arranged opposite to each other along the first direction X, and at least one column of the battery cells 20 among the plurality of columns of the battery cells 20 is provided on both sides along the first direction X of the battery cells 20, with the thermal management members 13 attached to the two second walls of the at least one battery cell 20. Among the plurality of columns of the battery cells 20, at least one column of the battery cells 20 satisfies the following condition: for any battery cell 20 among the at least one column of the battery cells 20, the battery cell 20 includes two second walls 21b arranged opposite to each other along the first direction X, and a thermal management member 13 is provided corresponding to the two second walls 21b; that is, the battery cells 20 in this column are sandwiched between the two thermal management members 13. Therefore, the two thermal management members 13 can simultaneously adjust the temperature of the battery cells 20 in this column, thereby improving the temperature adjustment efficiency and the safety of the battery 10. For example, if two thermal management members 13 are provided corresponding to each row of battery cells 20 among multiple rows of battery cells 20 in the battery 10, the temperature control efficiency can be significantly improved, and for example, if a battery cell 20 experiences thermal runaway, the temperature can be more effectively reduced, heat diffusion can be avoided, and the safety of the battery 10 can be improved.

[0139] In the embodiment of the present application, identical thermal management members 13 are provided between at least two adjacent rows of battery cells 20 among the multiple rows of battery cells 20. In this way, the adjacent two rows of battery cells 20 among the multiple rows of battery cells 20 satisfy the following condition. To facilitate processing and assembly of the battery 10, identical thermal management members 13 are provided between these two rows of battery cells 20. For example, along the first direction X, some of the battery cells 20 may satisfy the following condition. The identical thermal management members 13 are provided between the adjacent two rows of battery cells 20, and some of the battery cells 20 also satisfy the following condition. Since no thermal management members 13 are provided between two adjacent battery cells 20, the space utilization rate within the battery 10 is improved. Furthermore, for example, a thermal management member 13 may be provided between every two adjacent rows of battery cells 20 among the multiple rows of battery cells 20, so that each battery cell 20 corresponds to at least two thermal management members 13, thereby improving the temperature adjustment effect.

[0140] It should be understood that the number of thermal management elements 13 in the battery 10 of the embodiment of the present application may be set according to the actual application. For example, the number of thermal management elements 13 in the battery 10 can be selected according to the size and number of the battery cells 20.

[0141] For example, the battery includes a plurality of thermal management members 13 arranged along the first direction X to improve temperature regulation efficiency.

[0142] Also, for example, a plurality of thermal management members 1 3 are spaced apart along the first direction X, so that two adjacent thermal management members 1 3 At least one battery cell 20 is provided between the battery 10, and in addition to improving the volume utilization rate of the battery 10, it is also possible to improve the temperature adjustment efficiency.

[0143] Figure 13 is a partially enlarged view of any of the heat management members 13 shown in Figure 8. As shown in Figures 8 to 13, the heat management members 13 are provided with heat exchange channels 131 for accommodating a heat exchange medium, and the heat exchange channels 131 of multiple heat management members 13 communicate with each other.

[0144] Here, the heat exchange medium may be liquid, gas, or solid. For example, when cooling or lowering the temperature of the battery cells 20, the thermal management member 13 is used to contain a cooling fluid to lower the temperature of the battery cells 20. In this case, the thermal management member 13 may be called a cooling member, cooling system, or cooling plate, and the fluid contained therein may be called a cooling medium or cooling fluid, more specifically, a cooling liquid or cooling gas. The cooling medium may be designed to circulate to achieve a higher temperature adjustment effect. Specific examples of the cooling medium include water, a mixture of water and ethylene glycol, and air.

[0145] The heat exchange channels 131 of the multiple thermal management members 13 can be interconnected. This interconnection of the multiple thermal management members 13 facilitates management and control, improving the integrity and safety of the battery 10. On the other hand, if the temperature of a portion of the thermal management members 13 in the battery 10 changes significantly, the heat exchange channels can be used to achieve heat exchange, reducing the temperature difference between the multiple thermal management members 13 and improving temperature regulation efficiency. Each thermal management member 13 may be provided with multiple heat exchange channels, which are spaced apart along the third direction Z (i.e., the height direction) to increase the heat exchange area between the thermal management members 13 and the battery cells 20 and improve heat exchange efficiency.

[0146] Optionally, the heat exchange channels 131 of the multiple heat management elements 13 can be in communication with one another in various ways. For example, the heat exchange channels 131 of the multiple heat management elements 13 can be in communication with one another via piping.

[0147] 14 is a partial perspective schematic view of a plurality of battery cells 20 and a plurality of thermal management members 13 according to an embodiment of the present application. For example, the plurality of battery cells 20 and a plurality of thermal management members 13 shown in FIG. 14 may be a partially enlarged schematic view of region A in FIG. 8.

[0148] In an embodiment of the present application, as shown in FIG. 14, the multiple thermal management elements 13 include adjacent first and second thermal management elements 13a and 13b, where the first thermal management element 13a includes a first connecting pipe 131a communicating with the heat exchange channel 131, and the second thermal management element 13b includes a second connecting pipe 132b communicating with the heat exchange channel 131, and the first connecting pipe 131a and the second connecting pipe 132b are connected to each other so that the heat exchange channel 131 of the first thermal management element 13a and the heat exchange channel 131 of the second thermal management element 13b are connected to each other.

[0149] In the embodiment of the present application, by connecting the heat exchange channel 131 between the adjacent first thermal management member 13a and second thermal management member 13b via the first connecting pipe 131a and the second connecting pipe 132b, the difficulty of connecting the heat exchange channel 131 can be reduced, and by arranging the members connected to the heat exchange channel 131 together with the first thermal management member 13a and the second thermal management member 13b, the volume utilization rate of the battery 10 can be improved, thereby increasing the energy density of the battery 10.

[0150] It should be understood that the first connecting pipe 131a and the first thermal management member 13a may have an integrally molded structure or a separate structure. For example, the first connecting pipe 131a and the first thermal management member 13a may have a separate structure, and the first connecting pipe 131a may be connected to the first thermal management member 13a by adhesive connection, bolt connection, or welding. The connection method between the second connecting pipe 132b and the second thermal management member 13b is similar to the connection method between the first connecting pipe 131a and the first thermal management member 13a, so a description thereof will be omitted here. Furthermore, the connection method between the first connecting pipe 131a and the first thermal management member 13a and the connection method between the second connecting pipe 132b and the second thermal management member 13b may be the same or different. For example, they may be set to the same connection method for ease of processing.

[0151] The materials of the first connecting pipe 131a and the second connecting pipe 132b may be set according to the actual application, and the materials of the first connecting pipe 131a and the second connecting pipe 132b may be the same or different. For example, they may be made of natural rubber, styrene butadiene rubber, or butadiene rubber, or materials using ethylene propylene rubber, fluororubber, or silicone rubber that are acid-resistant, alkali-resistant, and high-temperature-resistant. For example, they may be made of metal materials that are corrosion-resistant and resistant to thermal expansion and contraction, such as iron, stainless steel, and copper-zinc alloy, or may be composite materials combining plastic, hot-melt adhesive, and alloy.

[0152] Optionally, the first connecting pipe 131a and the second connecting pipe 132b may be provided in any region of the first thermal management member 13a and the second thermal management member 13b that extends beyond one row of battery cells 20, respectively.

[0153] For example, in an embodiment of the present application, as shown in FIG. 14 , the first connecting pipe 131a is provided in an area exceeding one row of battery cells 20 along the second direction Y of the first thermal management member 13a, and the second connecting pipe 132b is provided in an area exceeding one row of battery cells 20 along the second direction Y of the second thermal management member 13b, where one row of battery cells 20 is the row of battery cells 20 between the first thermal management member 13a and the second thermal management member 13b, and the first connecting pipe 131a and the second connecting pipe 132b extend along the first direction X and are connected to each other.

[0154] In the embodiment of the present application, by extending the first connecting pipe 131a and the second connecting pipe 132b along the first direction and connecting them to each other, the transport path of the heat exchange medium in the heat exchange channel 131 of the first heat management member 13a and the heat exchange channel 131 of the second heat management member 13b can be shortened, which not only increases the transport efficiency of the heat exchange medium in the corresponding heat exchange channel 131, but also improves the volume utilization rate of the battery 10.

[0155] Optionally, the first connecting pipe 131a and the second connecting pipe 132b extend along the first direction X and are directly or indirectly connected to each other.

[0156] A case where the first connecting pipe 131a and the second connecting pipe 132b are directly connected will be described as an example. The first connecting pipe 131a and the second connecting pipe 132b may be connected in various ways. For example, the first connecting pipe 131a may have a first groove recessed from the inside of the first connecting pipe 131a toward the outside of the first connecting pipe 131a, and the second connecting pipe 132b may have a first protrusion protruding toward the outside of the second connecting pipe 132b. The first groove is used to accommodate the first protrusion so that the first connecting pipe 131a and the second connecting pipe 132b are connected to each other.

[0157] An example in which the first connecting pipe 131a and the second connecting pipe 132b are indirectly connected will be described. FIG. 15 is a schematic top view of the first heat management member 13a and the second heat management member 13b connected in an embodiment of the present application. As shown in FIGS. 14 and 15, the first connecting pipe 131a and the second connecting pipe 132b are indirectly connected via the intermediate connecting pipe 16. Here, the intermediate connecting pipe 16 includes a fixed pipe 161 and a moving pipe 162, which are movably and sealedly connected, and the moving pipe 162 is connected to the first connecting pipe 131a or the second connecting pipe 132b, so that the heat exchange channels 131 of the first heat management member 13a and the heat exchange channels 131 of the second heat management member 13b are connected to each other, and the heat exchange medium circulates continuously.

[0158] Here, the moving pipe 162 is hermetically connected to the fixed pipe 161 to prevent the medium from overflowing through the gap in the moving pipe 162. Optionally, the outer diameter of the fixed pipe 161 is smaller than the inner diameter of the moving pipe 162, and the outer diameters of the first connecting pipe 131a and the second connecting pipe 132b are smaller than the inner diameter of the moving pipe 162, thereby achieving a hermetically sealed connection between the intermediate connecting pipe 16 and the first connecting pipe 131a and the second connecting pipe 132b. The materials of the fixed pipe 161 and the moving pipe 162 may be the same or different. For example, the fixed pipe 161 and the moving pipe 162 may be composed of an adhesive layer and a skeleton layer. The skeleton layer may be made of cotton fiber, various synthetic fibers, carbon fiber, asbestos, steel wire, etc., and the adhesive layer may be made of natural rubber, styrene-butadiene rubber, butadiene rubber, etc. The fixed pipe 161 and the moving pipe 162 may be made of a metal material, a composite material, etc., but the present application is not limited thereto. The fixed pipe 161 may have properties such as high temperature resistance, small thermal deformation, a smooth inner wall, small fluid resistance, and strong pressure resistance. Optionally, the moving pipe 162 and the fixed pipe 161 may be attached using a ferrule or a threaded connection. Optionally, the intermediate connecting pipe 16 may include the fixed pipe 161 and at least one moving pipe 162. Here, the number of moving pipes 162 may be determined according to actual conditions. For example, it may be determined according to the distance between the first connecting pipe 131a and the second connecting pipe 132b. The greater the distance between the first connecting pipe 131a and the second connecting pipe 132b, the greater the number of moving pipes 162.

[0159] 15, for example, the intermediate connecting pipe 16 includes a first moving pipe 162a and a second moving pipe 162b. Specifically, the first moving pipe 162a can move in a direction away from the fixed pipe 161 in the first direction X, so that the first moving pipe 162a is connected to the first connecting pipe 131a. Similarly, the second moving pipe 162b can move in a direction away from the first moving pipe 162a in the first direction X, so that the second moving pipe 162b is connected to the second connecting pipe 132b. Alternatively, the first moving pipe 162a can move in a direction away from the fixed pipe 161 in the first direction X, so that the second moving pipe 162b is connected to the second connecting pipe 132b. moveThe tube 162a can move in the first direction X in a direction closer to the fixed tube 161, so that the first moving tube 162a is disconnected from the first connecting tube 131a, and similarly, the second moving tube 162a is disconnected from the first connecting tube 131a. move The tube 162b can move in the first direction X toward the fixed tube 161, whereby the second movable tube 162b is disconnected from the second connecting tube 132b, and the first connecting tube 131a and the second connecting tube 132b are not connected. In this way, by connecting and disconnecting the first connecting tube 131a and the second connecting tube 132b using the length-adjustable intermediate connecting tube 16, the difficulty of assembling the battery 10 can be reduced.

[0160] It should be noted that the connection method between the first moving pipe 162a and the first connecting pipe 131a may be the same as or different from the connection method between the second moving pipe 162b and the second connecting pipe 132b. For example, the first moving pipe 162a and the first connecting pipe 131a, and the second moving pipe 162b and the second connecting pipe 132b may all be threaded connections.

[0161] Fig. 16 is a partial side schematic view of the battery 10 of this embodiment. Fig. 17 is a partial schematic view of region D of yet another battery disclosed in an embodiment of the present application. Fig. 18 is another partial cross-sectional schematic view of the battery 10 of yet another embodiment of the present application. For example, Fig. 18 may be a cross-sectional schematic view of a portion of the battery 10 shown in Fig. 8 perpendicular to the first direction X. As shown in Figs. 16 to 18, the housing 11 further includes a support member 117 for supporting the first connecting pipe 131a and / or the second connecting pipe 132b.

[0162] In the embodiment of the present application, by supporting the first connecting pipe 131a and / or the second connecting pipe 132b by the support member 117, a gap may be formed between the wall of the casing 11 and the row of battery cells 20 located between the first thermal management member 13a and the second thermal management member 13b without adding any other member. For example, a gap 113 may be formed between the first wall 21a of the row of battery cells 20 and any wall of the casing 11, and the gap may be used to form at least a part of the collection cavity 112 so that the collection cavity 112 collects waste from the battery cells 20. In this way, the volume utilization rate of the battery 10 is increased, and the energy density of the battery 10 is increased.

[0163] It should be understood that the support member 117 can be in at least partial contact with the first connecting pipe 131a to support the first connecting pipe 131a, or the support member 117 can be in at least partial contact with the second connecting pipe 132b to support the second connecting pipe 132b, or the support member 117 can be in contact with at least a portion of the first connecting pipe 131a and at least a portion of the second connecting pipe 132b to support the first connecting pipe 131a and the second connecting pipe 132b.

[0164] For example, the support member 117 may be a member provided within the housing 11 , or the support member 117 may be a protruding structure provided on the wall of the housing 11 . For example, the support member 117 may be a protruding structure on the first housing wall 114 opposite the first wall 21a, which protrudes from the inner surface of the first housing wall 114 toward the inside of the battery 10, or the protruding structure may protrude from the inner surface of the first housing wall 114 and the inner surface of the third housing wall 116 toward the inside of the battery 10, or as shown in Figures 17 and 18, the support member 117 may be a protruding portion 117a on the third housing wall 116, which protrudes from the third housing wall 116 toward the inside of the battery 10, where the third housing wall 116 is a wall perpendicular to the second direction Y of the housing 11. Furthermore, the first connecting pipe 131a and the second connecting pipe 132b are connected along the first direction X, with the first connecting pipe 131a attached to the side of the protrusion 117a facing the first thermal management member 13a, and the second connecting pipe 132b attached to the side of the protrusion 117a facing the second thermal management member 13b.

[0165] It should be understood that in the embodiments of the present application, the support member 117 will be mainly described as the protrusion 117a of the third housing wall 116 as an example.

[0166] Optionally, in an embodiment of the present application, Fig. 19 is a partially enlarged view of region E in Fig. 18. As shown in Figs. 16 to 19, one side of the support member 117 along the third direction Z is used to attach the first connecting pipe 131a and / or the second connecting pipe 132b, and the third direction Z is perpendicular to the first direction X and the second direction Y.

[0167] It should be understood that the side of the support member 117 (for example, the protrusion 117a) along the third direction Z may be the side of the support member 117 perpendicular to the third direction Z.

[0168] In the embodiments of the present application, by attaching the first connecting pipe 131a and / or the second connecting pipe 132b to the side of the support member 117 along the third direction Z, the space in the third direction Z of the battery 10 can be utilized to improve the volume utilization rate of the battery 10. Furthermore, when assembling the battery 10, the support member 117 can be provided and the first connecting pipe 131a and / or the second connecting pipe 132b can be attached while the first connecting pipe 131a and the second connecting pipe 132b are in communication with each other. Alternatively, the support member 117 can be provided first and the first connecting pipe 131a or the second connecting pipe 132b can be attached, and then the first connecting pipe 131a and the second connecting pipe 132b can be connected to each other, thereby increasing the flexibility of assembly.

[0169] Optionally, a fixing member may be provided on the side of the support member 117 along the third direction Z, whereby the support member 117 is attached to the first connecting pipe 131a and / or the second connecting pipe 132b via the fixing member to support the first thermal management member 13a, the second thermal management member 13b, and the battery cells 20. Here, the fixing member may be realized in various ways, for example, the fixing member may be an adhesive or a position limiting structure, but the embodiments of the present application are not limited thereto.

[0170] Optionally, in an embodiment of the present application, as shown in FIG. 19, one side of the support member 117 along the third direction Z is provided with an accommodating groove 117b for accommodating at least a portion of the first connecting pipe 131a and / or at least a portion of the second connecting pipe 132b.

[0171] It should be understood that the radial dimension of the receiving groove 117b is equal to or greater than the radial dimension of the first connecting pipe 131a and / or the second connecting pipe 132b in order to receive at least a portion of the first connecting pipe 131a and / or at least a portion of the second connecting pipe 132b. Optionally, an adhesive 17 may be applied to the surface of the receiving groove 117b to further fix at least a portion of the first connecting pipe 131a and / or at least a portion of the second connecting pipe 132b.

[0172] In an embodiment of the present application, by providing an accommodation groove 117b on one side of the support member 117 along the third direction Z for accommodating at least a portion of the first connecting pipe 131a and / or at least a portion of the second connecting pipe 132b, the support member 117 can more stably support and fix the first connecting pipe 131a and / or the second connecting pipe 132b, thereby preventing the first connecting pipe 131a, the second connecting pipe 132b, and the row of battery cells 20 between them from shaking within the housing 11, thereby improving the stability and safety of the battery 10.

[0173] Although the present application has been described with reference to preferred embodiments, various modifications may be made and equivalents may be substituted for the components thereof without departing from the scope of the present application. In particular, the technical features described in each embodiment may be combined in any manner as long as there is no structural contradiction. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions within the scope of the claims.

Claims

1. A battery (10), A battery cell (20) having a pressure release mechanism (213) provided on a first wall (21a) of the battery cell (20); a thermal management member (13) for regulating the temperature of the battery cell (20), the thermal management member (13) being attached to a second wall (21 b) of the battery cell (20), the second wall (21 b) being different from the first wall (21 a); and a bus member (12) for electrically connecting an electrode terminal (214) of the battery cell (20), the electrode terminal (214) being provided on a third wall (21c) of the battery cell (20), the third wall (21c) being different from the first wall (21a); ​​and an enclosure (11) including an electrical cavity (111) for accommodating the battery cells (20) and the thermal management member (13), and a collection cavity (112) for collecting exhaust from the battery cells (20) upon activation of the pressure release mechanism (213); an isolation member (15) attached to the first wall (21 a), the isolation member (15) being used to isolate the electrical cavity (111) and the collection cavity (112), the isolation member (15) including a pressure release region (151) that is a weak region that breaks when the pressure release mechanism (213) is activated, and a non-pressure release region (152) that is a region other than the pressure release region (151); Including, When the pressure release mechanism (213) is not activated, the isolation member (15) is in a sealed state. A battery (10) characterized in that

2. 2. The battery (10) of claim 1, wherein the third wall (21c) is different from the second wall (21b).

3. the area of ​​the second wall (21b) is equal to or greater than the area of ​​the first wall (21a); ​​and / or 2. The battery (10) according to claim 1, wherein the area of ​​the second wall (21b) is equal to or greater than the area of ​​the third wall (21c).

4. The battery (10) according to claim 3, wherein the second wall (21b) is the wall of the battery cell (20) with the largest area.

5. 2. The battery (10) of claim 1, wherein the housing (11) further includes a first housing wall (114) opposed to and spaced apart from the first wall (21 a), and a gap (113) is present between the first wall (21 a) and the first housing wall (114) to form at least a portion of the collection cavity (112).

6. 6. The battery (10) according to claim 5, wherein the minimum distance (L) between the first wall (21a) and the first housing wall (114) is equal to or greater than 7 mm.

7. 7. The battery (10) according to claim 6, wherein the minimum distance (L) between the first wall (21a) and the first housing wall (114) is between 7 mm and 25 mm.

8. The battery (10) of claim 1, characterized in that the housing (11) further includes a second housing wall (115) fixed to the third wall (21c) and used to achieve fixation between the battery cell (20) and the housing (11).

9. 9. The battery (10) of claim 8, wherein the third wall (21c) is fixed to the second housing wall (115) by an adhesive (17).

10. The battery (10) of claim 1, characterized in that the battery (10) includes a plurality of rows of battery cells (20) arranged along a first direction (X), and each row of the plurality of rows of battery cells (20) includes at least one battery cell (20) arranged along a second direction (Y), and the first direction (X) is perpendicular to the second direction (Y) and the second wall (21b).

11. The battery (10) of claim 10, wherein the thermal management member (13) is attached to the second wall (21b) of at least one battery cell (20) in at least one row of the plurality of rows of battery cells (20).

12. 12. The battery (10) according to claim 11, wherein the battery cell (20) includes two second walls (21 b) arranged opposite each other along the first direction (X), and the thermal management member (13) attached to the two second walls (21 b) of at least one of the battery cells (20) is provided on both sides of the at least one row of battery cells (20) along the first direction (X), respectively, among the plurality of rows of battery cells (20).

13. The battery (10) of claim 11, wherein the same thermal management member (13) is provided between adjacent battery cells (20) in at least two rows of the plurality of rows of battery cells (20).

14. 11. The battery (10) of claim 10, wherein the battery includes a plurality of the thermal management members (13) arranged along the first direction (X).

15. 15. The battery (10) of claim 14, wherein a plurality of the thermal management members (13) are spaced apart along the first direction (X).

16. The battery (10) of claim 14, characterized in that the thermal management member (13) is provided with a heat exchange channel (131) for accommodating a heat exchange medium, and the heat exchange channels (131) of multiple thermal management members (13) are in communication with each other.

17. 17. The battery (10) of claim 16, wherein the plurality of thermal management members (13) include adjacent first and second thermal management members (13a) and (13b), the first thermal management member (13a) including a first connecting tube (131a) communicating with the heat exchange channel (131), the second thermal management member (13b) including a second connecting tube (132b) communicating with the heat exchange channel (131), and the first connecting tube (131a) and the second connecting tube (132b) being connected to each other such that the heat exchange channel (131) of the first thermal management member (13a) and the heat exchange channel (131) of the second thermal management member (13b) are in communication with each other.

18. 18. The battery (10) of claim 17, wherein the first connecting pipe (131 a) is provided in a region of the first thermal management member (13 a) that extends along the second direction (Y) beyond a single row of battery cells (20), the second connecting pipe (132 b) is provided in a region of the second thermal management member (13 b) that extends along the second direction (Y) beyond a single row of battery cells (20), the single row of battery cells (20) being a single row of battery cells (20) between the first thermal management member (13 a) and the second thermal management member (13 b), and the first connecting pipe (131 a) and the second connecting pipe (132 b) extend along the first direction (X) and are connected to each other.

19. 19. The battery (10) according to claim 18, wherein the housing (11) further includes a support member (117) for supporting the first connecting pipe (131a) and / or the second connecting pipe (132b).

20. The battery (10) of claim 19, characterized in that one side of the support member (117) along a third direction (Z) is used to attach the first connecting pipe (131a) and / or the second connecting pipe (132b), and the third direction (Z) is perpendicular to the first direction (X) and the second direction (Y).

21. The battery (10) described in claim 20, characterized in that an accommodation groove (117b) is provided on one side of the support member (117) along the third direction (Z) for accommodating at least a portion of the first connecting pipe (131a) and / or at least a portion of the second connecting pipe (132b).

22. The first wall (21a) is provided opposite the third wall (21c), and the second wall (21b) is connected to the first wall (21a) and the third wall (21c), or The battery (10) according to any one of claims 1 to 4, characterized in that the first wall (21a) is provided opposite the second wall (21b), and the third wall (21c) is connected to the first wall (21a) and the second wall (21b).

23. An electrical device, An electrical device comprising the battery (10) according to any one of claims 1 to 4, characterized in that the battery (10) is used to supply electrical energy to the electrical device.

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