Battery module, battery, and electric device

Abstract

A battery module, a battery and an electrical device, the battery module comprising a separator (100), a battery cell (22) and a busbar (300), the separator (100) is provided with a receiving cavity (102), the battery cell (22) is installed in the separator (100), the battery cell (22) has a pressure relief part (210), the pressure relief part (210) is located in the receiving cavity (102), and the busbar (300) is used for electrically connecting the battery cell (22), and the busbar (300) is exposed outside the receiving cavity (102). The battery (20) comprises the battery module. The electrical device comprises the battery (20). When the battery cell (22) is in thermal runaway, the thermal runaway gas is discharged from the pressure relief part (210) into the receiving cavity (102), the receiving cavity (102) isolates the thermal runaway gas from the busbar (300), and direct impact of the thermal runaway gas on the busbar (300) is avoided, so that the busbar (300) is not damaged.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and more specifically, to a battery module, a battery, and an electrical device. Background Technology

[0002] With the popularization and promotion of new energy vehicles, the charging and discharging performance and range of these vehicles are increasingly attracting attention and importance. Power batteries, a type of rechargeable battery, are the power source for new energy vehicles and are widely used in the field.

[0003] Battery life is an important reference indicator. When thermal runaway occurs during transportation or in actual use, the thermal runaway gas will come into contact with the electrical connection components, causing damage to the insulation of the electrical connection components, thereby leading to the insulation failure of the electrical connection components. Summary of the Invention

[0004] In view of this, this application discloses a battery module, a battery, and an electrical device.

[0005] A battery module includes a separator, battery cells, and a busbar. The separator has a receiving cavity, the battery cells are mounted on the separator, and each battery cell has a pressure relief section located within the receiving cavity. The busbar is used to electrically connect to the battery cells and is exposed outside the receiving cavity. In this battery module, the receiving cavity isolates the pressure relief section of the battery cells from the busbar. When thermal runaway occurs in a battery cell, the runaway gas is discharged from the pressure relief section into the receiving cavity, which isolates the runaway gas from the busbar, preventing the runaway gas from directly impacting and damaging the busbar.

[0006] In some embodiments, the separator is provided with a pressure relief hole communicating with the receiving cavity. In this way, when a battery cell experiences thermal runaway, the thermal runaway gas is discharged from the pressure relief part into the receiving cavity and then discharged from the receiving cavity to the outside of the receiving cavity through the pressure relief hole, thereby timely venting the high-pressure gas generated during thermal runaway to the outside and preventing the thermal runaway gas from accumulating and damaging other components.

[0007] In some embodiments, the pressure relief port and the manifold are located on different sides of the separator. Thus, when a single battery cell experiences thermal runaway, the runaway gas within the containment cavity is discharged through the pressure relief port. The direction of the runaway gas discharge is opposite to that of the manifold, preventing the runaway gas from directly impacting and damaging the manifold.

[0008] In some embodiments, the separator has a positioning hole communicating with the receiving cavity, through which the battery cell passes. This facilitates the installation of the battery cell into the separator.

[0009] In some embodiments, the pressure relief section is located on the side of the positioning hole facing the receiving cavity, and the busbar is located on the side of the positioning hole away from the receiving cavity. In this way, the busbar is exposed outside the receiving cavity, while the pressure relief section of the battery cell is located inside the receiving cavity, and the pressure relief section of the battery cell and the busbar can be isolated through the receiving cavity.

[0010] In some embodiments, the diameter of the positioning hole is equal to or greater than the outer diameter of the battery cell. This allows the battery cell to pass smoothly through the positioning hole, facilitating assembly between the battery cell and the separator.

[0011] In some embodiments, the separator has two positioning holes facing each other along a first direction, and the battery cell passes through the two positioning holes along the first direction, with the pressure relief section located between the two positioning holes. Thus, when the battery cell is installed in the separator, it can pass through the positioning hole on either side of the separator into the receiving cavity, making the installation and removal of the battery cell more convenient.

[0012] In some embodiments, the separator extends along a second direction and includes a plurality of positioning holes spaced apart along the second direction. Multiple battery cells are arranged side-by-side, and each of the side-by-side battery cells is configured to correspond one-to-one with one of the positioning holes. This facilitates electrical connection between all battery cells and the busbar, thereby enabling series or parallel connection between all battery cells.

[0013] In some embodiments, the separator further includes a partition for dividing the receiving cavity into multiple receiving cavities, each for accommodating at least one battery cell. This prevents thermal runaway of one battery cell from causing thermal runaway of all battery cells within the receiving cavity.

[0014] In some embodiments, a separator is provided between two positioning holes spaced apart along a second direction, and the separator extends along a first direction. Thus, the separator divides the receiving cavity into multiple receiving cavities without interfering with the passage of individual battery cells through the positioning holes.

[0015] In some embodiments, a gap is provided between the separator and the top and / or bottom wall of the receiving cavity in the thickness direction of the separator. Thus, when thermal runaway occurs in a single battery cell, the pressure relief section opens to allow the thermal runaway gas to be discharged from the pressure relief section into the receiving cavity, and the gap provides space for the pressure relief section, which is housed within the receiving cavity, to open.

[0016] In some embodiments, a first gap is provided between the separator and the top wall of the receiving cavity in the thickness direction of the separator, and a second gap is provided between the separator and the bottom wall of the receiving cavity. The values ​​of the first gap and the second gap are equal, the diameter of the battery cell is R, and the values ​​of the first gap and the second gap are both in the range of R / 100 mm to R / 3 mm. In this way, the pressure relief section can release air while ensuring that the space of the receiving cavity is not too large and occupies space.

[0017] In some embodiments, the pressure relief section is oriented to one side, and the orientation of the pressure relief section of each pair of adjacent battery cells is different. Thus, when a battery cell experiences thermal runaway, the exhaust directions of the pressure relief sections of each pair of adjacent battery cells are different, reducing interference between the exhaust from adjacent battery cells.

[0018] In some embodiments, the separator includes a cover and a mounting portion, the mounting portion having an opening, and the cover covering the opening to form a receiving cavity with the mounting portion. This facilitates the installation and removal of the separator when maintenance of the battery cells mounted on it is required.

[0019] In some embodiments, the mounting portion includes a first section and a second section that can overlap each other. This facilitates the mounting of individual battery cells onto the separator and improves assembly efficiency.

[0020] A battery includes the aforementioned battery module. In the event of thermal runaway of the battery module, the thermal runaway gas is isolated from the electrical connection components of the battery module, effectively preventing safety hazards from arising.

[0021] An electrical device includes the aforementioned battery. The battery in the aforementioned electrical device has high safety performance. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the published drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a vehicle in one embodiment;

[0024] Figure 2 This is a schematic diagram of a battery in one embodiment;

[0025] Figure 3 This is a schematic diagram of a battery module in one embodiment;

[0026] Figure 4 for Figure 3 An exploded view of the battery module shown.

[0027] Figure 5 for Figure 3 A schematic diagram of a single battery cell in the battery module shown.

[0028] Figure 6 for Figure 3 Top view of the battery module shown;

[0029] Figure 7 for Figure 3 A schematic diagram of the mounting section in the battery module of the first embodiment shown;

[0030] Figure 8 This is a first cross-sectional view of the mounting portion in the battery module of the second embodiment;

[0031] Figure 9 for Figure 8 The second sectional view of the mounting section shown;

[0032] Figure 10 This is a schematic diagram of the mounting section in the battery module of the third embodiment.

[0033] Figure label:

[0034] 10. Vehicle; 11. Controller; 12. Motor; 20. Battery; 21. Housing; 21a. First part; 21b. Second part; 22. Battery cell; 210. Pressure relief section; 220. Electrode terminal; 100. Isolator; 100a. Side; 100b. End face; 101. Pressure relief hole; 102. Receiving cavity; 110. Cover; 120. Mounting part; 121. Opening; 122. Positioning hole; 123. First section; 124. Second section; 300. Busbar; 400. Separator; X. First direction; Y. Second direction; Z. Thickness direction. Detailed Implementation

[0035] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0036] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0041] With the popularization and promotion of new energy vehicles, their charging and discharging performance and range are increasingly attracting attention and importance. Power batteries, a type of rechargeable battery, are the power source for new energy vehicles and are widely used in the field.

[0042] Battery life is an important reference indicator. When thermal runaway occurs during transportation or in actual use, the thermal runaway gas will come into contact with the electrical connection components, causing damage to the insulation of the electrical connection components, thereby leading to the insulation failure of the electrical connection components.

[0043] Based on the above considerations, and after in-depth research, a battery module, a battery, and an electrical device were designed. In the battery module, the pressure relief section of the battery cell is housed within a receiving cavity, while the busbar is exposed outside the receiving cavity. When thermal runaway occurs in the battery cell, the receiving cavity isolates the thermal runaway gas from the busbar, preventing the thermal runaway gas from directly impacting and damaging the busbar.

[0044] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0045] For ease of explanation, the following embodiments will be described using a vehicle 10 as an example of an electrical device according to an embodiment of this application.

[0046] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 10 provided in some embodiments of this application. The vehicle 10 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery 20 is disposed inside the vehicle 10, and the battery 20 can be located at the bottom, front, or rear of the vehicle 10. The battery 20 can be used to power the vehicle 10; for example, the battery 20 can serve as the operating power source for the vehicle 10. The vehicle 10 may also include a controller 11 and a motor 12. The controller 11 is used to control the battery 20 to supply power to the motor 12, for example, to meet the power requirements of starting, navigating, and driving the vehicle 10. In other embodiments of this application, the battery 20 can not only serve as the operating power source for the vehicle 10, but also as the driving power source for the vehicle 10, replacing or partially replacing gasoline or natural gas to provide driving force for the vehicle 10.

[0047] Please refer to Figure 2 , Figure 2This is an exploded view of a battery 20 provided in some embodiments of this application. The battery 20 includes a housing 21 and battery cells 22, with the battery cells 22 housed within the housing 21. The housing 21 provides a space for housing the battery cells 22, and the housing 21 can have various structures. In some embodiments, the housing 21 may include a first portion 21a and a second portion 21b, which overlap each other, together defining a space for housing the battery cells 22. The second portion 21b may be a hollow structure with one open end, and the first portion 21a may be a plate-like structure, covering the open side of the second portion 21b so that the first portion 21a and the second portion 21b together define the space; alternatively, the first portion 21a and the second portion 21b may both be hollow structures with one open side, with the open side of the first portion 21a covering the open side of the second portion 21b. Of course, the box 21 formed by the first part 21a and the second part 21b can be of various shapes, such as a cylinder, a cuboid, etc.

[0048] In battery 20, there can be multiple battery cells 22, which can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 22 are connected in both series and parallel. Multiple battery cells 22 can be directly connected in series, parallel, or in a mixed manner, and then the whole assembly of multiple battery cells 22 is housed in housing 21. Of course, battery 20 can also be composed of multiple battery cells 22 first connected in series, parallel, or in a mixed manner to form a battery module, and then multiple battery modules are connected in series, parallel, or in a mixed manner to form a whole, which is housed in housing 21.

[0049] Each battery cell 22 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 22 can be cylindrical, flat, cuboid, or other shapes. In this application, the battery cell 22 can include a lithium-ion secondary battery 20, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc., but this application embodiment is not limited thereto. The battery cell 22 can be cylindrical, flat, cuboid, or other shapes, but this application embodiment is not limited thereto.

[0050] Please refer to Figure 3 In one embodiment, the battery module includes an isolator 100, a battery cell 22, and a busbar 300. The busbar 300 is used to electrically connect the battery cell 22, and the battery cell 22 is mounted on the isolator 100. (Referring to reference...) Figure 4 The separator 100 has a receiving cavity 102 inside, the battery cell 22 has a pressure relief part 210, the pressure relief part 210 is located inside the receiving cavity 102, and the busbar 300 is exposed outside the receiving cavity 102.

[0051] In this application, the separator 100 is configured as a component having a receiving cavity 102 and capable of housing a battery cell 22. When the battery cell 22 is installed in the separator 100, the pressure relief portion 210 of the battery cell 22 can be accommodated in the receiving cavity 102.

[0052] In this application, the receiving cavity 102 may be rectangular, circular, or other shapes. No specific limitation is made to the shape of the receiving cavity 102 here.

[0053] In this application, the battery cell 22 is cylindrical, and each battery 20 has an electrode terminal 220 and a pressure relief portion 210. The electrode terminal 220 and the pressure relief portion 210 may be located on the same side or different sides of the battery cell 22. The pressure relief portion 210 may be a pressure relief component separately provided on the battery cell 22 or a pressure relief structure directly formed on the battery cell 22.

[0054] Here, the battery cell 22 also includes a housing, an electrode assembly, and an end cap. One plane of the housing has an opening, which is configured to be without walls, allowing communication between the inside and outside of the housing. The end cap covers the opening and connects to the housing to form a cavity for housing the electrode assembly, which is filled with an electrolyte, such as an electrolyte solution. The electrode assembly has a first electrode, a second electrode, and a separator. The first electrode, the second electrode, and the separator are wound or stacked to form the electrode assembly. The first electrode, the second electrode, and the separator are not shown in the accompanying drawings, but those skilled in the art will understand how the first electrode, the second electrode, and the separator are wound or stacked to form the electrode assembly 24, which will not be described in detail here.

[0055] In this application, the busbar 300 is an electrical connection component with conductive properties. The busbar 300 is connected to the electrode terminals 220 of all battery cells 22 to connect all battery cells 22 in series or parallel and to lead out the positive and negative terminals. The busbar 300 is made of materials with good conductivity, such as aluminum or copper.

[0056] The aforementioned battery module isolates the pressure relief section 210 of the battery cell 22 and the busbar 300 through the receiving cavity 102. When the battery cell 22 experiences thermal runaway, the thermal runaway gas is discharged from the pressure relief section 210 into the receiving cavity 102. The receiving cavity 102 isolates the thermal runaway gas from the busbar 300, preventing the thermal runaway gas from directly impacting the busbar 300 and causing damage to it.

[0057] Please refer to some embodiments in this application. Figure 4 The isolation element 100 is provided with a pressure relief hole 101 that communicates with the receiving cavity 102.

[0058] In this application, the pressure relief hole 101 can be circular, rectangular, elliptical, or other shapes. The number of pressure relief holes 101 is not limited to one; for example, there can be at least two pressure relief holes 101 to quickly expel thermal runaway gas from the receiving cavity 102. When there are at least two pressure relief holes 101, the diameter and shape of each pressure relief hole 101 can be exactly the same or not. Here, no specific limitation is made on the shape and number of pressure relief holes 101.

[0059] With the above settings, when the battery cell 22 experiences thermal runaway, the thermal runaway gas is discharged from the pressure relief section 210 into the receiving cavity 102 and discharged from the pressure relief hole 101 to the outside of the receiving cavity 102, thereby timely venting the high-pressure gas generated during thermal runaway to the outside and preventing the thermal runaway gas from accumulating and damaging other components.

[0060] Please refer to some embodiments in this application. Figure 3 and Figure 4 The pressure relief hole 101 and the manifold 300 are located on different sides of the isolation member 100.

[0061] In this embodiment, the isolation member 100 is rectangular and includes a side surface 100a and an end surface 100b located on different sides. The pressure relief hole 101 is provided on the end surface 100b of the isolation member 100, and the manifold 300 is exposed outside the receiving cavity 102 and located on the side surface 100a of the isolation member 100.

[0062] For example, refer to Figure 1 The isolation member 100 includes a first end face, a second end face, a first side face, a second side face, a third side face, and a fourth side face. The first end face and the second end face are arranged opposite to each other, the first side face and the second side face are arranged opposite to each other, and the third side face and the fourth side face are arranged opposite to each other. The first end face and the second end face of the isolation member 100 are each provided with a pressure relief hole 101, and the manifold 300 is located on the first side face and the second side face of the isolation member 100, respectively.

[0063] Here, the pressure relief hole 101 can also be provided on the side 100a of the isolation member 100, and the manifold 300 is located on the end face 100b of the isolation member 100.

[0064] In other embodiments, the isolation member 100 may also be circular or other shapes, and the pressure relief hole 101 and the manifold 300 may also be in other relative positions.

[0065] With the above settings, when the battery cell 22 experiences thermal runaway, the thermal runaway gas in the containment cavity 102 is discharged through the pressure relief hole 101. The discharge direction of the thermal runaway gas is located on a different side from that of the manifold 300, preventing the thermal runaway gas from directly impacting and damaging the manifold 300.

[0066] Please refer to some embodiments in this application. Figure 4 The separator 100 is provided with a positioning hole 122 that communicates with the receiving cavity 102, and the battery cell 22 passes through the positioning hole 122.

[0067] In this embodiment, the battery cell 22 is cylindrical, and the positioning hole 122 is also circular to better fit the battery cell 22. In other embodiments, the positioning hole 122 may also be square or other shapes.

[0068] The above configuration facilitates the installation of the battery cell 22 onto the separator 100.

[0069] Please refer to some embodiments in this application. Figure 4 The pressure relief part 210 is located on the side of the positioning hole 122 facing the receiving cavity 102, and the manifold 300 is located on the side of the positioning hole 122 away from the receiving cavity 102.

[0070] Here, the pressure relief part 210 is located on the side of the positioning hole 122 facing the receiving cavity 102, that is, the pressure relief part 210 is located inside the receiving cavity 102, and the manifold 300 is located on the side of the positioning hole 122 away from the receiving cavity 102, that is, the manifold 300 is located outside the receiving cavity 102.

[0071] It should be noted that you should refer to the following: Figure 4 and Figure 5 The battery cell 22 has electrode terminals 220 that are electrically connected to the busbar 300. When the battery cell 22 is installed in the separator 100, the battery cell 22 passes through the positioning hole 122 into the receiving cavity 102. The pressure relief portion 210 of the battery cell 22 is located on the side of the positioning hole 122 facing the receiving cavity 102, and the portion of the battery cell 22 with electrode terminals 220 is located on the side of the positioning hole 122 away from the receiving cavity 102.

[0072] With the above arrangement, the busbar 300 is exposed outside the receiving cavity 102, and the pressure relief part 210 of the battery cell 22 is located inside the receiving cavity 102, so that the pressure relief part 210 of the battery cell 22 and the busbar 300 can be isolated through the receiving cavity 102.

[0073] Please refer to some embodiments in this application. Figure 6 and Figure 7 The diameter of the positioning hole 122 is equal to or greater than the outer diameter of the battery cell 22.

[0074] Here, the diameter of the positioning hole 122 is also the diameter of the positioning hole 122. Figure 7 The opening size in the Y direction shown in Figure 7 is the outer diameter of the battery cell 22, which is also the size of the battery cell 22 in the Y direction shown in Figure 7.

[0075] For example, when the diameter of the positioning hole 122 is equal to the outer diameter of the battery cell 22, the battery cell 22 and the positioning hole 122 are interference-fitted, and no additional limiting structure is required. The battery cell 22 and the positioning hole 122 can be fixed in place.

[0076] For example, when the diameter of the positioning hole 122 is larger than the outer diameter of the battery cell 22, there will be a gap between the battery cell 22 and the positioning hole 122. It is necessary to install a baffle or seal to seal the gap between the battery cell 22 and the positioning hole 122, thereby preventing the thermal runaway gas in the receiving cavity 102 from leaking out through the gap.

[0077] With the above settings, the battery cell 22 can pass smoothly through the positioning hole 122, which facilitates the assembly between the battery cell 22 and the separator 100.

[0078] Please refer to some embodiments in this application. Figure 4 The isolation component 100 is provided with two positioning holes 122 that are opposite each other along the first direction. The battery cell 22 passes through the two positioning holes 122 along the first direction, and the pressure relief part 210 is located between the two positioning holes 122.

[0079] Here, the first direction is Figure 4 The X direction is shown.

[0080] It should be noted that, in conjunction with references Figure 4 and Figure 6 The battery cell 22 has electrode terminals 220 at both ends, and the polarities of the electrode terminals 220 at both ends are different. The pressure relief part 210 is located between two positioning holes 122, and both ends of the battery cell 22 are located on the side of the positioning holes 122 away from the receiving cavity 102, so that the busbars 300 at both ends of the battery cell 22 are exposed outside the receiving cavity 102.

[0081] With the above configuration, when the battery cell 22 is installed on the separator 100, the battery cell 22 can pass through the positioning hole 122 on either side of the separator 100 and be inserted into the receiving cavity 102, making it more convenient to install and remove the battery cell 22.

[0082] Please refer to some embodiments in this application. Figure 6 and Figure 7 The isolation member 100 extends along the second direction and includes a plurality of positioning holes 122 spaced apart along the second direction. There are a plurality of battery cells 22 arranged side by side, and the plurality of battery cells 22 arranged side by side are configured to correspond one-to-one with the plurality of positioning holes.

[0083] Here, the second direction is Figure 6 Y direction shown.

[0084] In this embodiment, all positioning holes 122 located on the same side have the same shape and size. In other embodiments, the shape and size of all positioning holes 122 located on the same side may not be exactly the same.

[0085] The above configuration facilitates the electrical connection of all battery cells 22 with the busbar 300, thereby enabling series or parallel connection of all battery cells 22.

[0086] Please refer to some embodiments in this application. Figure 8 and Figure 9 The separator 100 also includes a separator 400 for dividing the receiving cavity 102 into a plurality of receiving cavities 102, each of which is used to receive at least one battery cell 22.

[0087] In this embodiment, each receiving cavity 102 is used to receive one battery cell 22. In other embodiments, each receiving cavity 102 may also be used to receive at least two battery cells 22.

[0088] With the above configuration, the separator 400 divides the accommodating cavity 102 into multiple accommodating cavities 102, so that the thermal runaway gas in each accommodating cavity 102 will not come into contact with the battery cell 22 in another accommodating cavity 102, thus avoiding thermal runaway of one battery cell 22 leading to thermal runaway of all battery cells 22 in the accommodating cavity 102.

[0089] Please refer to some embodiments in this application. Figure 8 A separator 400 is provided between two positioning holes 122 spaced apart along the second direction, and the separator 400 extends along the first direction.

[0090] In this embodiment, the separator 400 and the isolation member 100 are an integral structure, which has good integrity and is easy to install quickly. In other embodiments, the separator 400 and the isolation member 100 can also be separate structures, and the separator 400 can be fixed in the receiving cavity 102 of the isolation member 100 by a detachable connection or a non-detachable method such as riveting.

[0091] In this embodiment, the separator 400 is in the shape of a flat plate. In other embodiments, the separator 400 may also be in the shape of an arc-shaped plate.

[0092] With the above configuration, the separator 400 divides the receiving cavity 102 into multiple receiving cavities 102, and does not interfere with the battery cell 22 passing through the positioning hole 122.

[0093] Please refer to some embodiments in this application. Figure 8 In the thickness direction of the separator 100, a gap is provided between the separator 400 and the top and / or bottom wall of the receiving cavity 102.

[0094] Here, the thickness direction of the spacer 100 is... Figure 8 The Z direction is shown.

[0095] With the above configuration, when the battery cell 22 experiences thermal runaway, the pressure relief section 210 opens to allow the thermal runaway gas to be discharged from the pressure relief section 210 to the receiving cavity 102, and the gap provides space for the pressure relief section 210, which is housed in the receiving cavity 102, to open.

[0096] Please refer to some embodiments in this application. Figure 8 In the thickness direction of the separator 100, the separator 400 and the top wall of the receiving cavity 102 are provided with a first gap X1, and the separator 400 and the bottom wall of the receiving cavity 102 are provided with a second gap X2. The values ​​of the first gap X1 and the second gap X2 are equal. The diameter of the battery cell 22 is R, and the values ​​of the first gap X1 and the second gap X2 are both in the range of R / 100 mm to R / 3 mm.

[0097] It should be noted that in other embodiments, the values ​​of the first gap X1 and the second gap X2 may not be equal.

[0098] The above settings allow the pressure relief section 210 to release air while ensuring that the space of the receiving cavity 102 is not too large and thus does not take up too much space.

[0099] Please refer to some embodiments in this application. Figure 5 The pressure relief section 210 is arranged facing one side, and the pressure relief section 210 of each two adjacent battery cells 22 has a different orientation.

[0100] Specifically, in this embodiment, the battery cell 22 has an electrode terminal 220 on its end side, and a pressure relief portion 210 is provided on the periphery of the battery cell 22. The pressure relief portion 210 is a scratch-type pressure relief valve formed on the outer surface of the battery cell 22. The pressure relief portion 210 has a U-shaped opening, and the U-shaped openings of each two adjacent battery cells 22 face different directions. In other embodiments, the pressure relief portion 210 may also have a V-shaped opening or other shapes.

[0101] With the above settings, when the battery cell 22 experiences thermal runaway, the exhaust directions of the pressure relief section 210 of each pair of adjacent battery cells 22 are different, reducing mutual interference between the exhaust of adjacent battery cells 22.

[0102] Please refer to some embodiments in this application. Figure 4 The isolation member 100 includes a cover 110 and a mounting portion 120. The mounting portion 120 has an opening 121, and the cover 110 covers the opening 121 to form a receiving cavity 102 with the mounting portion 120.

[0103] In this embodiment, the positioning hole 122 is provided in the mounting part 120, and the pressure relief hole 101 is provided in the cover 110. In other embodiments, the pressure relief hole 101 may also be provided in the mounting part 120.

[0104] In this embodiment, the mounting part 120 has two openings 121, and a cover 110 is provided at each opening 121. In other embodiments, the mounting part 120 may have only one opening 121, and the cover 110 may be provided only at this opening 121.

[0105] In this embodiment, the mounting part 120 and the cover 110 are connected by riveting or welding. In other embodiments, the mounting part 120 and the cover 110 may be an integrally formed structure, which has good integrity and high mechanical strength.

[0106] With the above settings, it is convenient to disassemble and install the isolation component 100 when it is necessary to maintain the battery cell 22 installed on the isolation component 100.

[0107] Please refer to some embodiments in this application. Figure 10 The mounting section 120 includes a first section 123 and a second section 124, which can cover each other.

[0108] In this embodiment, the first portion 123 and the second portion 124 are fixedly connected by riveting or welding. In other embodiments, the first portion 123 and the second portion 124 may also be fixedly connected by adhesive or other means.

[0109] In this embodiment, the first portion 123 and the second portion 124 are divided into two parts in the thickness direction by the mounting portion 120. That is, the first portion 123 and the second portion 124 have the same shape and size, and the first portion 123 and the second portion 124 can be manufactured independently. In other embodiments, the dimensions of the first portion 123 and the second portion 124 may not be exactly the same.

[0110] The above configuration facilitates the installation of the battery cell 22 onto the separator 100, thereby improving assembly efficiency.

[0111] Please refer to Figure 2 In one embodiment, the battery 20 includes the aforementioned battery module. When the battery module experiences thermal runaway, the thermal runaway gas is isolated from the electrical connection components of the battery module, effectively preventing safety hazards from arising.

[0112] Please refer to Figure 1 In one embodiment, the electrical device includes the aforementioned battery 20. The battery 20 in the aforementioned electrical device has high safety performance.

[0113] According to some embodiments in this application, see Figure 3 and Figure 4 In one embodiment, the battery module includes an isolator 100, a plurality of battery cells 22, and a busbar 300. The busbar 300 is used to electrically connect the battery cells 22. Each battery cell 22 is mounted in the isolator 100. The isolator 100 has a receiving cavity 102. Each battery cell 22 has a pressure relief portion 210 located within the receiving cavity 102, and the busbar 300 is exposed outside the receiving cavity 102. The isolator 100 has a pressure relief hole 101 communicating with the receiving cavity 102. The pressure relief hole 101 and the busbar 300 are located on different sides of the receiving cavity 102. The isolator 100 has two positioning holes 122 opposite each other along a first direction. The battery cells 22 pass through the two positioning holes 122 along the first direction, and the pressure relief portion 210 is located between the two positioning holes 122. The isolation member 100 extends along the second direction and includes a plurality of positioning holes 122 spaced apart along the second direction. A plurality of battery cells 22 arranged side by side are configured to correspond one-to-one with the plurality of positioning holes 122.

[0114] The separator 100 further includes a partition 400 extending along a first direction. The partition 400 divides the receiving cavity 102 into multiple receiving cavities 102, each of which is used to accommodate one battery cell 22. In the thickness direction of the separator 100, a first gap X1 is provided between the partition 400 and the top wall of the receiving cavity 102, and a second gap X2 is provided between the partition 400 and the bottom wall of the receiving cavity 102. The values ​​of the first gap X1 and the second gap X2 are equal. The diameter of the battery cell 22 is R, and the values ​​of the first gap X1 and the second gap X2 are both in the range of R / 100 mm to R / 3 mm.

[0115] According to some embodiments in this application, see Figure 2 In one embodiment, the battery 20 includes the battery module described above.

[0116] According to some embodiments in this application, see Figure 1 In one embodiment, the electrical device includes the battery 20 described above.

[0117] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0118] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery module, comprising: The isolation member (100) has a receiving cavity (102) and two positioning holes (122) opposite each other along a first direction, and the two positioning holes (122) are in communication with the receiving cavity (102); A battery cell (22) is mounted on the separator (100). The battery cell (22) has electrode terminals (220) and a pressure relief portion (210). The electrode terminals (220) are located at both ends of the battery cell (22). Busbar (300) for electrically connecting the electrode terminals; The battery cell (22) is inserted through the two positioning holes (122), and the pressure relief part (210) is located between the two positioning holes (122) so that the pressure relief part (210) is located inside the receiving cavity (102); both ends of the battery cell (22) are located on the side of the positioning holes (122) away from the receiving cavity (102) so that the electrode terminal (220) and the busbar (300) are exposed outside the receiving cavity (102); When the diameter of the positioning hole (122) is larger than the outer diameter of the battery cell (22), there is a gap between the battery cell (22) and the positioning hole (122). The battery module also includes a sealing element, which is used to seal the gap between the battery cell (22) and the positioning hole (122).

2. The battery module according to claim 1, wherein, The isolation element (100) is provided with a pressure relief hole (101) communicating with the receiving cavity (102).

3. The battery module according to claim 2, wherein, The pressure relief hole (101) and the manifold (300) are located on different sides of the receiving cavity (102).

4. The battery module according to claim 1, wherein, The isolation member (100) extends along a second direction and includes a plurality of positioning holes (122) spaced apart along the second direction. There are a plurality of battery cells (22) arranged side by side, and the plurality of battery cells (22) arranged side by side are configured to correspond one-to-one with the plurality of positioning holes (122).

5. The battery module according to claim 4, wherein, The separator (100) further includes a partition (400) for dividing the receiving cavity (102) into a plurality of receiving cavities (102), each of which is used to receive at least one of the battery cells (22).

6. The battery module according to claim 5, wherein, A separator (400) is provided between two positioning holes (122) spaced apart along the second direction, and the separator (400) extends along the first direction.

7. The battery module according to claim 5, wherein, In the thickness direction of the separator (100), there is a gap between the separator (400) and the top and / or bottom wall of the receiving cavity (102).

8. The battery module according to claim 7, wherein, In the thickness direction of the separator (100), the separator (400) and the top wall of the receiving cavity (102) are provided with a first gap, and the separator (400) and the bottom wall of the receiving cavity (102) are provided with a second gap. The values ​​of the first gap and the second gap are equal. The diameter of the battery cell (22) is R, and the values ​​of the first gap and the second gap are both in the range of R / 100 mm to R / 3 mm.

9. The battery module according to claim 4, wherein, The pressure relief section (210) is arranged facing one side, and the pressure relief section (210) of each two adjacent battery cells (22) has a different orientation.

10. The battery module according to claim 1, wherein, The isolation element (100) includes a cover (110) and a mounting portion (120), the mounting portion (120) having an opening (121), the cover (110) covering the opening (121) to form the receiving cavity (102) with the mounting portion (120).

11. The battery module according to claim 10, wherein, The mounting portion (120) includes a first portion (123) and a second portion (124), which can cover each other.

12. A battery, wherein, Includes the battery module according to any one of claims 1-11.

13. An electrical appliance, wherein, Includes the battery of claim 12, the battery being used to provide electrical energy to the electrical device.

Images