Battery and electric device

Abstract

The application provides a battery and a power utilization device. The battery comprises a containing box with a containing cavity; a first battery module arranged in the containing cavity, the first battery module comprising a first battery cell and a first bus assembly electrically connected, the first battery cell extending in a first direction in the containing cavity, and an end of the first battery cell in the first direction being provided with a first explosion-proof valve; and a second battery module arranged in the containing cavity, the second battery module comprising a second battery cell and a second bus assembly electrically connected, the second battery cell extending in a second direction in the containing cavity, and an end of the second battery cell in the second direction being provided with a second explosion-proof valve, the second direction intersecting the first direction. In the battery, the first explosion-proof valve of the first battery cell and the second explosion-proof valve of the second battery cell can respectively spray high-temperature fluid towards different directions, reducing the risk of the high-temperature fluid converging in the same direction, thereby reducing the risk of the containing box being rapidly burned through locally, and improving the safety of the battery.

Description

Technical Field

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

[0002] In batteries (such as battery packs) provided by related technologies, all battery cells are arranged in parallel within the battery box. After thermal runaway of the battery cells, the battery box is easily burned through by the high-temperature fluid ejected from the battery cells, thus reducing the safety of the battery. Utility Model Content

[0003] Embodiments of this application provide a battery and an electrical device that can improve the technical problem of insufficient battery safety.

[0004] In a first aspect, embodiments of this application provide a battery, comprising:

[0005] A container box with a receiving cavity;

[0006] A first battery module is disposed within the receiving cavity. The first battery module includes a first battery cell and a first busbar assembly that are electrically connected. The first battery cell extends in the receiving cavity along a first direction, and the end of the first battery cell in the first direction has a first explosion-proof valve.

[0007] A second battery module is disposed within the receiving cavity. The second battery module includes a second battery cell and a second busbar assembly that are electrically connected. The second battery cell extends within the receiving cavity along a second direction. The end of the second battery cell in the second direction has a second explosion-proof valve. The second direction intersects with the first direction.

[0008] In one embodiment, the first busbar assembly includes a first bracket and a first busbar, the first busbar being disposed on the first bracket and connected to the first battery cell;

[0009] The second busbar assembly includes a second bracket and a second busbar, the second busbar being disposed on the second bracket and connected to the second battery cell.

[0010] In one embodiment, the first busbar is connected to the second busbar.

[0011] In one embodiment, the first bracket and the second bracket are adjacent; in the first direction, one end of the first bracket faces the second bracket; in the second direction, one side of the first bracket protrudes beyond one end of the second bracket.

[0012] The first busbar includes a first sub-part and a second sub-part arranged at an angle. The first sub-part is disposed on one end of the first bracket and is connected to the first battery cell. The second sub-part extends away from the first bracket.

[0013] The second busbar includes a third sub-section and a fourth sub-section arranged at an angle. The third sub-section is disposed on one end of the second bracket and is connected to the second battery cell. The fourth sub-section extends away from the second bracket and is connected to the second sub-section.

[0014] In one embodiment, a first receiving groove is formed on the first support, and the first battery cell is at least partially received in the first receiving groove;

[0015] The second support has a second receiving slot formed therein, and the second battery cell is at least partially received in the second receiving slot.

[0016] In one embodiment, a first adhesive layer is disposed within the first receiving slot, and the first battery cell is bonded to the first bracket via the first adhesive layer; and / or,

[0017] A second adhesive layer is provided in the second receiving slot, and the second battery cell is bonded to the second bracket through the second adhesive layer.

[0018] In one embodiment, the first bracket includes two first end plates spaced apart along the first direction, at least one of the first end plates having a first clearance hole communicating with the first receiving slot, the first battery cell having a first terminal post corresponding to the first clearance hole, the first busbar extending at least partially onto the first end plate, the first end plate having the first clearance hole, and the first busbar connected to the first terminal post; and / or,

[0019] The second bracket includes two second end plates arranged at intervals along the second direction. At least one of the second end plates has a second clearance hole that communicates with the second receiving slot. The second battery cell has a second pole post, which is correspondingly arranged with the second clearance hole. The second busbar extends at least partially to the second end plate. The second end plate is provided with the second clearance hole, and the second busbar is connected to the second pole post.

[0020] In one embodiment, the first bracket is adjacent to the second bracket, and in the first direction, the second bracket is located on one side of the first bracket.

[0021] In one embodiment, the first bracket has a first pressure relief hole that communicates with the first receiving groove, the first pressure relief hole faces the second bracket, and the first explosion-proof valve is correspondingly arranged with the first pressure relief hole.

[0022] In one embodiment, the first support and the second support are spaced apart and define a first gap.

[0023] In one embodiment, a thickened portion is formed on the second bracket, and the thickened portion is disposed corresponding to the first pressure relief hole in the first direction.

[0024] In one embodiment, a drainage portion is further formed on the outer peripheral surface of the second bracket, the drainage portion extending away from the first bracket, and the drainage portion being disposed corresponding to the first pressure relief hole.

[0025] In one embodiment, the drainage portion is a guide groove.

[0026] In one embodiment, a third receiving groove and a fourth receiving groove are further formed on the receiving box within the receiving cavity;

[0027] The third receiving slot is configured to correspond to the first receiving slot, with a portion of the first battery cell housed in the first receiving slot and another portion of the first battery cell housed in the third receiving slot.

[0028] The fourth receiving slot is configured to correspond to the second receiving slot, with a portion of the second battery cell housed in the second receiving slot and another portion of the second battery cell housed in the fourth receiving slot.

[0029] In one embodiment, the battery further includes a battery management system module disposed within the receiving cavity, wherein both the first busbar component and the second busbar component are connected to the battery management system module.

[0030] The first busbar component includes a first bracket, the second busbar component includes a second bracket, and the battery management system module includes a printed circuit board with a battery management system chip, the printed circuit board being connected to the first bracket and the second bracket.

[0031] In one embodiment, both the first cell and the second cell are cylindrical cells.

[0032] In one embodiment, the battery further includes a third explosion-proof valve disposed on the housing, the third explosion-proof valve being in communication with the housing cavity.

[0033] In one embodiment, the receiving box includes a box body and a lid, the lid being disposed on the box body, and the lid and the box body together defining the receiving cavity.

[0034] In one embodiment, the first battery cell is fixedly connected to the first busbar assembly; the second battery cell is fixedly connected to the second busbar assembly.

[0035] In one embodiment, the battery is a battery pack.

[0036] In one embodiment, the battery pack is a low-voltage battery pack, and the output voltage of the low-voltage battery pack is less than or equal to 48V.

[0037] In one embodiment, the low-voltage battery pack is a startup battery pack.

[0038] Secondly, embodiments of this application provide an electrical device including the battery described above.

[0039] The beneficial effects of the embodiments of this application are as follows:

[0040] In the battery provided in this application embodiment, since the extension direction of the first cell and the extension direction of the second cell are set to be different in the housing cavity, the first explosion-proof valve at the end of the first cell in the first direction and the second explosion-proof valve at the end of the second cell in the second direction can spray high-temperature fluid in different directions respectively. This can reduce the risk of high-temperature fluid converging in the same direction, thereby reducing the risk of local rapid burn-through of the housing and improving the safety of the battery. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a three-dimensional schematic diagram of the battery provided in the embodiments of this application. Figure 1 ;

[0043] Figure 2 This is a three-dimensional schematic diagram of the battery provided in the embodiments of this application. Figure 2 The cover is omitted in the picture;

[0044] Figure 3 This is a three-dimensional schematic diagram of the battery provided in the embodiments of this application. Figure 3 The container is omitted in the picture;

[0045] Figure 4 This is a three-dimensional schematic diagram of the battery provided in the embodiments of this application. Figure 4 The container is omitted in the picture;

[0046] Figure 5This is a three-dimensional schematic diagram of a battery provided in an embodiment of this application. Figure 5 The container is omitted in the picture;

[0047] Figure 6 This is a three-dimensional schematic diagram of the first battery module in the battery provided in an embodiment of this application;

[0048] Figure 7 This is a three-dimensional schematic diagram of the first support in the battery provided in an embodiment of this application. Figure 1 ;

[0049] Figure 8 This is a three-dimensional schematic diagram of the first support in the battery provided in an embodiment of this application. Figure 2 ;

[0050] Figure 9 This is a three-dimensional schematic diagram of the second battery module in the battery provided in the embodiments of this application. Figure 1 ;

[0051] Figure 10 This is a three-dimensional schematic diagram of the second battery module in the battery provided in the embodiments of this application. Figure 2 The second busbar is omitted in the diagram;

[0052] Figure 11 This is a perspective view of the second support in the battery provided in an embodiment of this application;

[0053] Figure 12 This is a perspective view of the battery housing provided in an embodiment of this application;

[0054] Figure 13 This is a schematic diagram of the structure of the electrical device provided in the embodiments of this application.

[0055] Explanation of reference numerals in the attached figures:

[0056] 100. Battery;

[0057] 1. Receiving box; 101. Receiving cavity; 102. Third receiving slot; 103. Fourth receiving slot; 11. Box body; 12. Lid;

[0058] 2. First battery module;

[0059] 21. First battery cell; 211. First terminal post; 212. First explosion-proof valve;

[0060] 22. First busbar component;

[0061] 221. First bracket; 2211. First receiving groove; 2212. First end plate; 2213. First clearance hole; 2214. First pressure relief hole; 2215. First mounting post;

[0062] 222, First busbar; 2221, First sub-component; 2222, Second sub-component;

[0063] 23. First adhesive layer;

[0064] 3. Second battery module;

[0065] 31. Second battery cell; 311. Second terminal post; 312. Second explosion-proof valve;

[0066] 32. Second bus component;

[0067] 321. Second bracket; 3211. Second receiving slot; 3212. Second end plate; 3213. Second clearance hole; 3214. Second pressure relief hole; 3215. Second mounting post;

[0068] 322, Second busbar; 3221, Third sub-component; 3222, Fourth sub-component;

[0069] 33. Second adhesive layer;

[0070] 4. First gap;

[0071] 5. Battery Management System Module;

[0072] 6. Third explosion-proof valve;

[0073] 200. Electrical appliances. Detailed Implementation

[0074] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0075] Furthermore, it should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in its actual use or operation, specifically the directions shown in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0076] 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0077] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0078] The terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0079] In the description of the embodiments of this application, the words "example" or "for example" are used to indicate exemplification, illustration, or description. Any embodiment or design described as "example" or "for example" in the embodiments of this application is not to be construed as being more preferred or having more advantages than another embodiment or design. The use of the words "example" or "for example" is intended to present relative concepts in a clear manner.

[0080] To facilitate understanding of the present application, the spline curves and arrows used in the reference numerals in the accompanying drawings are explained below: spline curves without arrows indicate solid parts, that is, parts with solid structures; spline curves with arrows indicate virtual parts, that is, parts without solid structures.

[0081] Firstly, please see Figures 1 to 12This application provides a battery 100. The battery 100 includes a housing 1, a first battery module 2, and a second battery module 3. The housing 1 has a receiving cavity 101. The first battery module 2 is disposed within the receiving cavity 101. The first battery module 2 includes a first battery cell 21 and a first busbar assembly 22 electrically connected. The first battery cell 21 extends within the receiving cavity 101 along a first direction, and its end in the first direction has a first explosion-proof valve 212. The second battery module 3 is disposed within the receiving cavity 101. The second battery module 3 includes a second battery cell 31 and a second busbar assembly 32 electrically connected. The second battery cell 31 extends within the receiving cavity 101 along a second direction, and its end in the second direction has a second explosion-proof valve 312. The second direction intersects the first direction.

[0082] Battery 100 refers to a device that converts chemical energy into electrical energy. Battery 100 can take different forms; for example, it can be a battery pack.

[0083] The battery 100 includes a housing 1, which serves as a container to house and protect a first battery module 2 and a second battery module 3. Specifically, the housing 1 has a receiving cavity 101 within which the first battery module 2 and the second battery module 3 are disposed. The housing 1 is made of at least one material, including but not limited to metal and plastic. The shape of the housing 1 can be customized as needed; for example, the housing 1 may be square.

[0084] The battery 100 includes a first battery module 2, which includes a first battery cell 21 and a first busbar assembly 22 connected together. Specifically, the first battery cell 21 is at least electrically connected to the first busbar assembly 22. Optionally, the first battery cell 21 and the first busbar assembly 22 are also mechanically connected together. The number of first battery cells 21 in the first battery module 2 can be one or more, but the number of first busbar assemblies 22 is usually one. The number of first battery modules 2 in the battery 100 can be one or more.

[0085] The battery 100 includes a second battery module 3, which includes a second battery cell 31 and a second busbar assembly 32 connected together. Specifically, the second battery cell 31 is at least electrically connected to the second busbar assembly 32. Optionally, the second battery cell 31 and the second busbar assembly 32 are also mechanically connected together. The number of second battery cells 31 in the second battery module 3 can be one or more, but the number of second busbar assemblies 32 is usually one. The number of second battery modules 3 in the battery 100 can be one or more.

[0086] Both the first cell 21 and the second cell 31 are battery cells. A battery cell, also known as a single battery cell, is the basic unit for converting chemical energy into electrical energy. Optionally, both the first cell 21 and the second cell 31 are rechargeable cells, which can achieve the interconversion of chemical energy and electrical energy. It should be noted that the first cell 21 and the second cell 31 can be the same or different. In one example, the first cell 21 is a prismatic cell, and the second cell 31 is a cylindrical cell. In another example, the first cell 21 is a lithium iron phosphate cell, and the second cell 31 is a lithium iron manganese phosphate cell.

[0087] In a first direction, the first battery cell 21 has two opposing ends, and at least one end of the first battery cell 21 has a first explosion-proof valve 212. In the event of thermal runaway of the first battery cell 21, the first battery cell 21 releases pressure through the first explosion-proof valve 212, i.e., ejects a high-temperature fluid. In a second direction, the second battery cell 31 has two opposing ends, and at least one end of the second battery cell 31 has a second explosion-proof valve 312. In the event of thermal runaway of the second battery cell 31, the second battery cell 31 ejects a high-temperature fluid through the second explosion-proof valve 312. The high-temperature fluid is typically a high-temperature gas-liquid mixture.

[0088] Both the first busbar assembly 22 and the second busbar assembly 32 are conductive structures, so that the first battery cell 21 can transmit current to the external circuit through the first busbar assembly 22; similarly, the second battery cell 31 can transmit current to the external circuit through the second busbar assembly 32. It should be noted that the first busbar assembly 22 and the second busbar assembly 32 can be the same or different.

[0089] Within the receiving cavity 101, the first battery cell 21 extends along a first direction, and the second battery cell 31 extends along a second direction, which intersects with the first direction. That is, the extending direction of the first battery cell 21 within the receiving cavity 101 is different from the extending direction of the second battery cell 31 within the receiving cavity 101. The extending direction of the first battery cell 21 generally refers to the direction from one end of the first battery cell 21 to the other end; similarly, the extending direction of the second battery cell 31 refers to the direction from one end of the second battery cell 31 to the other end. In one example, the first battery cell 21 is placed horizontally within the receiving cavity 101, and the second battery cell 31 is placed vertically within the receiving cavity 101. For another example, please refer to... Figure 5 The first direction is the X-axis direction, and the second direction is the Y-axis direction. The first battery cell 21 and the second battery cell 31 are both placed horizontally in the receiving cavity 101, but the first battery cell 21 extends along the X-axis direction and the second battery cell 31 extends along the Y-axis direction. Optionally, the second direction is perpendicular to the first direction.

[0090] In the battery 100 provided in this application embodiment, since the extension direction of the first cell 21 and the extension direction of the second cell 31 are set to be different in the receiving cavity 101, the first explosion-proof valve 212 at the end of the first cell 21 in the first direction and the second explosion-proof valve 312 at the end of the second cell 31 in the second direction can spray high-temperature fluid in different directions respectively. This can reduce the risk of high-temperature fluid converging in the same direction, thereby reducing the risk of the receiving box 1 being rapidly burned through by high-temperature fluid and improving the safety of the battery 100.

[0091] Furthermore, since the first battery cell 21 and the second battery cell 31 are respectively connected to independent busbar components (specifically, the first busbar component 22 and the second busbar component 32) to form independent modules (specifically, the first battery module 2 and the second battery module 3) and housed within the receiving cavity 101 of the receiving box 1, and the extension directions of the first battery cell 21 and the second battery cell 31 are set to be different within the receiving cavity 101, the arrangement of the first battery cell 21 and the second battery cell 31 becomes more flexible. During battery 100 assembly, the arrangement of the first battery cell 21 and the second battery cell 31 can be reasonably adjusted according to the size and / or shape of the receiving cavity 101 within the receiving box 1. This reduces the limitations on the size and / or shape of the receiving cavity 101 within the receiving box 1, allowing for more flexible and diverse design of the receiving box 1. For example, when designing the receiving box 1, it can be designed according to the assembly space on the electrical device 200 where the battery 100 is installed, so that the battery 100 can better fit the assembly space on the electrical device 200.

[0092] Furthermore, with the size and / or shape of the receiving cavity 101 of the receiving box 1 fixed, the arrangement between the first cell 21 and the second cell 31 can be adjusted during the manufacturing process of the battery 100, so that the first cell 21 and the second cell 31 can be better housed in the receiving cavity 101, thereby reducing the manufacturing difficulty of the battery 100 and controlling the volume of the battery 100.

[0093] In some implementations, please refer to Figures 2 to 5The first battery cell 21 is fixedly connected to the first busbar assembly 22; the second battery cell 31 is fixedly connected to the second busbar assembly 32. That is, the first battery cell 21 and the first busbar assembly 22 are not only electrically connected but also mechanically fixed together, making the first battery module 2 an independent assembly; similarly, the second battery cell 31 and the second busbar assembly 32 are not only electrically connected but also mechanically fixed together, making the second battery module 3 another independent assembly. Compared to the first battery cell 21 and the second battery cell 31 extending in the same direction within the housing 101, the first battery cell 21 and the second battery cell 31 extending in different directions within the housing 101 not only increases the difficulty of installing the first battery cell 21 and the second battery cell 31 with the housing 1 but also increases the difficulty of wiring the first battery cell 21 and the second battery cell 31 with other components. By setting the first battery module 2 and the second battery module 3 as independent assemblies, the first cell 21 and the first busbar assembly 22 are assembled into the first battery module 2 before being placed in the box, and the second cell 31 and the second busbar assembly 32 are assembled into the second battery module 3. This assembly process can be carried out independently outside the box, which is not only more convenient to operate, but also enables modular production and reduces the manufacturing difficulty of the battery 100. In addition, the connection effect of each battery module can be tested again before being placed in the box to ensure that the battery modules have high reliability after being placed in the box. Furthermore, it is also more convenient to maintain the battery 100.

[0094] In some implementations, please refer to Figure 4 The first battery module 2 and the second battery module 3 are arranged adjacent to each other. In the first direction, the second battery module 3 is located to one side of the first battery module 2, that is, the second battery module 3 and the first battery module 2 are arranged side by side in the housing 1. This arrangement can effectively shorten the length of the battery 100 in the second direction. Of course, in some embodiments, the first battery module 2 and the second battery module 3 can also be stacked, for example, in the thickness direction of the battery 100, the first battery module 2 and the second battery module 3 are distributed vertically.

[0095] In some embodiments, the first battery module 2 and the second battery module 3 are arranged adjacent to each other. In a first direction, the second battery module 3 is located on one side of the first battery module 2, and the first explosion-proof valve 212 is provided on the end of the first cell 21 away from the second battery module 3 in the first direction. This reduces the risk of the first explosion-proof valve 212 spraying high-temperature fluid towards the second cell 31. Optionally, the first direction is perpendicular to the second direction, thereby further distancing the high-temperature fluid sprayed by the first explosion-proof valve 212 from the second cell 31.

[0096] In some implementations, please refer to Figure 2 and Figure 3The battery 100 also includes a battery management system module 5 disposed within the receiving cavity 101. The first busbar assembly 22 and the second busbar assembly 32 are both connected to the battery management system module 5. It can be seen that the first battery module 2 and the second battery module 3 are both connected to the same battery management system (BMS) module 5. The battery management system module 5 manages and controls the first cell 21 and the second cell 31 respectively, enabling the battery 100 to operate safely and efficiently. By sharing the same battery management system module 5, the cost of the battery 100 is reduced.

[0097] In some implementations, please refer to Figure 5 Both the first cell 21 and the second cell 31 are cylindrical cells. A cylindrical cell is a cell with a cylindrical shape. Cylindrical cells have better resistance to expansion during cycling. Since the first cell 21 and the second cell 31 extend in different directions within the receiving cavity 101, this reduces the risk of abnormal local stress inside the battery 100. Of course, in other embodiments, the first cell 21 and the second cell 31 can also be square, hexagonal prism, etc.

[0098] In some implementations, please refer to Figure 6 , Figure 9 and Figure 10 The first busbar assembly 22 includes a first support 221 and a first busbar 222. The first busbar 222 is disposed on the first support 221 and connected to the first battery cell 21. The second busbar assembly 32 includes a second support 321 and a second busbar 322. The second busbar 322 is disposed on the second support 321 and connected to the second battery cell 31. In the above scheme, the first support 221 and the second support 321 are typically non-conductive structures, such as plastic parts, while the first busbar 222 and the second busbar 322 are both conductive structures, such as metal parts. With the above arrangement, in the first battery module 2, the first support 221 can support the first busbar 222, and the first battery cell 21 is connected to the external circuit through the first busbar 222; in the second battery module 3, the second support 321 can support the second busbar 322, and the second battery cell 31 is connected to the external circuit through the second busbar 322. As an example, both the first busbar 222 and the second busbar 322 are busbars, such as copper busbars or aluminum busbars.

[0099] In some implementations, please refer to Figure 4The first busbar 222 is connected to the second busbar 322, thereby achieving an electrical connection between the first busbar assembly 22 and the second busbar assembly 32, and consequently, an electrical connection between the first battery cell 21 and the second battery cell 31. It should be noted that the first battery cell 21 and the second battery cell 31 can be connected in series or in parallel.

[0100] It should be noted that the number of first busbars 222 in the first busbar assembly 22 can be multiple, and the different first busbars 222 may not be completely identical in their uses. For example, the first busbar assembly 22 may contain multiple first cells 21, and also multiple first busbars 222. One first busbar 222 is used to connect the first cell 21 to the battery management system module 5, another first busbar 222 is used to connect the first cell 21 to the second cell 31, and the remaining first busbars 222 are used to connect different first cells 21. Similarly, the number of second busbars 322 in the second busbar assembly 32 can be multiple, and the different second busbars 322 may also not be completely identical in their uses.

[0101] In some implementations, please refer to Figure 4 The first bracket 221 is adjacent to the second bracket 321. In a first direction, one end of the first bracket 221 faces the second bracket 321. In a second direction, one side of the first bracket 221 protrudes beyond one end of the second bracket 321. The first busbar 222 includes a first sub-part 2221 and a second sub-part 2222 arranged at an angle. The first sub-part 2221 is disposed on one end of the first bracket 221 and connected to the first battery cell 21. The second sub-part 2222 extends away from the first bracket 221. The second busbar 322 includes a third sub-part 3221 and a fourth sub-part 3222 arranged at an angle. The third sub-part 3221 is disposed on one end of the second bracket 321 and connected to the second battery cell 31. The fourth sub-part 3222 extends away from the second bracket 321. The fourth sub-part 3222 is connected to the second sub-part 2222. The above configuration effectively reduces the difficulty of connecting the first battery module 2 and the second battery module 3 together via the first busbar 222 and the second busbar 322. During assembly, one of the first battery module 2 and the second battery module 3 can be placed into the housing 1 first, and then the remaining one can be placed into the housing 1. After that, the fourth sub-part 3222 can be connected to the second sub-part 2222.

[0102] In the first busbar 222, the first sub-part 2221 and the second sub-part 2222 are arranged at an angle, and the angle between the first sub-part 2221 and the second sub-part 2222 can be 45° to 135°. Optionally, the first sub-part 2221 and the second sub-part 2222 are perpendicular, that is, the angle between them is 90°. In the second busbar 322, the third sub-part 3221 and the fourth sub-part 3222 are arranged at an angle, and the angle between the third sub-part 3221 and the fourth sub-part 3222 can be 45° to 135°. Optionally, the third sub-part 3221 and the fourth sub-part 3222 are perpendicular, that is, the angle between them is 90°. The fourth sub-part 3222 is connected to the second sub-part 2222, which can be by welding or by threaded connection using threaded fasteners. As an example, the fourth sub-part 3222 and the second sub-part 2222 overlap and are connected by threaded fasteners.

[0103] For example, see Figure 4 and Figure 5 The X-axis is taken as the first direction, and the Y-axis as the second direction. In the X-axis direction, the first support 221 has two opposite ends, and the second support 321 has two opposite sides; in the Y-axis direction, the first support 221 has two opposite sides, and the second support 321 has two opposite ends. The first support 221 and the second support 321 are adjacent. In the Y-axis direction, the size of the first support 221 is larger than the size of the second support 321, that is, the distance between the opposite sides of the first support 221 is greater than the distance between the opposite ends of the second support 321. Specifically, in the Y-axis direction, one side of the first support 221 protrudes beyond one end of the second support 321, and the other side of the first support 221 is flush with the other end of the second support 321. Thus, an unused area misaligned with the first support 221 and the second support 321 is formed within the receiving cavity 101 of the receiving box 1. Therefore, the first busbar 222 and the second busbar 322 are configured to be connected in the idle area, which can reduce the interference between the first support 221 and the second support 321 and make effective use of the receiving cavity 101.

[0104] In some implementations, please refer to Figures 6 to 11A first receiving groove 2211 is formed on a first support 221, and a first battery cell 21 is at least partially received within the first receiving groove 2211. A second receiving groove 3211 is formed on a second support 321, and a second battery cell 31 is at least partially received within the second receiving groove 3211. By utilizing the first receiving groove 2211 on the first support 221 to receive the first battery cell 21, the first support 221 can not only protect the first battery cell 21, but also limit the first battery cell 21 to a certain extent. Similarly, by utilizing the second receiving groove 3211 on the second support 321 to receive the second battery cell 31, the second support 321 can not only protect the second battery cell 31, but also limit the second battery cell 31 to a certain extent. Optionally, the first receiving groove 2211 is adapted to at least a portion of the outer contour of the first battery cell 21, and the second receiving groove 3211 is adapted to at least a portion of the outer contour of the second battery cell 31. As an example, the first battery cell 21 is a cylindrical battery cell, and the first receiving slot 2211 is a semi-circular slot; the second battery cell 31 is also a cylindrical battery cell, and the second receiving slot 3211 is also a semi-circular slot.

[0105] In some implementations, please refer to Figure 8 A first adhesive layer 23 is provided inside the first receiving groove 2211, and the first battery cell 21 is bonded to the first bracket 221 through the first adhesive layer 23. Specifically, the first battery cell 21 is fixedly connected to the first busbar assembly 22 by bonding it to the first bracket 221. Fixing the first battery cell 21 by adhesive bonding minimizes pressure and damage to the first battery cell 21. Optionally, the first adhesive layer 23 is a structural adhesive layer. Of course, in other methods, the first battery cell 21 and the first bracket 221 can also be connected and fixed by snap-fit.

[0106] In some implementations, please refer to Figure 11 A second adhesive layer 33 is provided inside the second receiving slot 3211, and the second battery cell 31 is bonded to the second bracket 321 through the second adhesive layer 33. Specifically, the second battery cell 31 is fixedly connected to the second busbar assembly 32 by bonding it to the second bracket 321. Fixing the second battery cell 31 by adhesive bonding minimizes pressure and damage to the second battery cell 31. Optionally, the second adhesive layer 33 can also be a structural adhesive layer. Of course, in other methods, the second battery cell 31 and the second bracket 321 can also be connected and fixed by snap-fit.

[0107] In some implementations, please refer to Figures 6 to 8The first support 221 includes two first end plates 2212 spaced apart along a first direction. At least one first end plate 2212 has a first clearance hole 2213 communicating with a first receiving groove 2211. The first battery cell 21 has a first terminal post 211, which is correspondingly disposed with the first clearance hole 2213. The first busbar 222 extends at least partially onto the first end plate 2212 with the first clearance hole 2213, and the first busbar 222 is connected to the first terminal post 211.

[0108] In the first direction, the first battery cell 21 is constrained within the first receiving groove 2211 by two first end plates 2212 on the first bracket 221. To facilitate the connection between the first battery cell 21 and the first busbar 222 outside the first bracket 221, at least one first end plate 2212 is provided with a first clearance hole 2213. The first clearance hole 2213 may be provided on one of the first end plates 2212, or both first end plates 2212 may have the first clearance hole 2213. The first busbar 222 is disposed on the first end plate 2212 with the first clearance hole 2213. The first clearance hole 2213 is specifically used to avoid the first terminal post 211 on the first battery cell 21. The first clearance hole 2213 corresponds to the first terminal post 211, and the first busbar 222 is connected to the first terminal post 211 through the first clearance hole 2213. When both first end plates 2212 of the first bracket 221 are provided with first clearance holes 2213, the first pole post 211 can be configured to be led out from the opposite ends of the first battery cell 21.

[0109] In some implementations, please refer to Figures 9 to 11 The second support 321 includes two second end plates 3212 spaced apart along a second direction. At least one second end plate 3212 has a second clearance hole 3213 communicating with a second receiving groove 3211. The second battery cell 31 has a second terminal 311, which is correspondingly disposed with the second clearance hole 3213. The second busbar 322 extends at least partially onto the second end plate 3212 with the second clearance hole 3213, and is connected to the second terminal 311.

[0110] In the second direction, the second battery cell 31 is constrained within the second receiving groove 3211 by two second end plates 3212 on the second bracket 321. To facilitate the connection between the second battery cell 31 and the second busbar 322 outside the second bracket 321, at least one second end plate 3212 is provided with a second clearance hole 3213. The second clearance hole 3213 may be provided on one of the second end plates 3212, or both second end plates 3212 may have the second clearance hole 3213. The second busbar 322 is disposed on the second end plate 3212 with the second clearance hole 3213. The second clearance hole 3213 is specifically used to avoid the second terminal post 311 on the second battery cell 31. The second clearance hole 3213 corresponds to the second terminal post 311, and the second busbar 322 is connected to the second terminal post 311 through the second clearance hole 3213. When the second end plates 3212 of the second bracket 321 are provided with second clearance holes 3213, the second pole post 311 can be set to be led out from the opposite ends of the second cell 31.

[0111] In some implementations, please refer to Figure 5 The first bracket 221 and the second bracket 321 are adjacent to each other, and in the first direction, the second bracket 321 is located on one side of the first bracket 221. This arrangement allows the first battery module 2 and the second battery module 3 to be more concentrated in distribution, which is beneficial for controlling the volume of the battery 100.

[0112] In some implementations, please refer to Figure 5 and Figure 6 The first bracket 221 has a first pressure relief hole 2214 that communicates with the first receiving groove 2211. The first pressure relief hole 2214 faces the second bracket 321. The first battery cell 21 has a first explosion-proof valve 212, which is correspondingly arranged with the first pressure relief hole 2214. In the above technical solution, since the first battery cell 21 and the second battery cell 31 extend in different directions within the receiving cavity 101, the first battery cell 21 is prone to spraying the released high-temperature fluid onto the second battery module 3 during thermal runaway. To reduce the risk of thermal runaway of the first battery cell 21 spreading to the second battery cell 31, the first pressure relief hole 2214 on the first bracket 221 is configured to face the second bracket 321. Thus, when the first battery cell 21 in the first receiving tank 2211 experiences thermal runaway, the high-temperature fluid ejected from the first explosion-proof valve 212 is sprayed onto the second bracket 321 through the first pressure relief hole 2214. The second bracket 321 can prevent the high-temperature fluid from contacting the second battery cell 31 in the second receiving tank 3211, thereby reducing the risk of thermal runaway of the second battery cell 31.

[0113] As an example, in the first direction, the first pressure relief hole 2214 is directly opposite the second bracket 321. Optionally, the first pressure relief hole 2214 communicates with the first clearance hole 2213.

[0114] In some implementations, please refer to Figure 5 The first support 221 and the second support 321 are spaced apart and define a first gap 4. When the first cell 21 thermally runs away and releases high-temperature fluid, the high-temperature fluid will be blocked by the second support 321, but the first gap 4 can form a pressure relief channel. The high-temperature fluid can flow through the first gap 4 to other positions in the housing cavity 101, reducing the risk of high-temperature fluid accumulating locally and causing the local temperature of the housing cavity 101 to become too high, leading to the spread of thermal runaway and the burning through of the housing box 1.

[0115] In some implementations, please refer to Figure 10 and Figure 11 The second bracket 321 has a second pressure relief hole 3214 that connects to the second receiving groove 3211. The second battery cell 31 has a second explosion-proof valve 312, which is correspondingly arranged with the second pressure relief hole 3214. Optionally, the second pressure relief hole 3214 is connected to the second clearance hole 3213.

[0116] Optionally, please see Figure 1 The battery 100 also includes a third explosion-proof valve 6 disposed on the housing 1, which is connected to the housing cavity 101. With the first bracket 221 and the second bracket 321 defining the first gap 4, the first gap 4 is connected to the housing cavity 101, thereby allowing the high-temperature fluid ejected from the first cell 21 to be directed to the third explosion-proof valve 6 for pressure relief, thus improving the safety of the battery 100.

[0117] In some embodiments, a thickened portion (not shown) is formed on the second bracket 321, and in a first direction, the thickened portion corresponds to the first pressure relief hole 2214. The thickened portion is the part of the second bracket 321 with increased thickness. In the first direction, the position of the thickened portion corresponds to the position of the first pressure relief hole 2214, so that the high-temperature fluid ejected from the first cell 21 through the first pressure relief hole 2214 is blocked by the thickened portion. Furthermore, due to the increased thickness of the thickened portion, the high-temperature fluid is less likely to burn through the second bracket 321, further improving the safety of the second cell 31.

[0118] As an example, the second bracket 321 has an inner side plate close to the first bracket 221, the first pressure relief hole 2214 faces the inner side plate of the first bracket 221, and the inner side plate of the first bracket 221 is thickened as a whole, that is, the inner side plate of the first bracket 221 is a thickened part. Of course, in other examples, the inner side plate of the first bracket 221 can also be locally thickened, and the locally thickened part is the thickened part.

[0119] In some embodiments, a drainage portion is also formed on the outer peripheral surface of the second support 321. The drainage portion extends in a direction away from the first support 221 and is correspondingly disposed with the first pressure relief hole 2214. The drainage portion can guide the high-temperature fluid ejected from the first battery cell 21 to flow on the outer peripheral surface of the second support 321 in a direction away from the first support 221, reducing the risk of local heat accumulation in the receiving cavity 101.

[0120] Optionally, please see Figure 1 The battery 100 also includes a third explosion-proof valve 6 disposed on the housing 1 and communicating with the housing cavity 101. The third explosion-proof valve 6 corresponds to the flow-inducing part and is located downstream of the flow-inducing part, so that the flow-inducing part can guide the high-temperature fluid ejected from the first cell 21 to the third explosion-proof valve 6 for pressure relief, thereby improving the safety of the battery 100.

[0121] In some embodiments, the drainage portion is a guide groove. Specifically, the outer peripheral surface of the second bracket 321 is an arc surface, and a first rib and a second rib extending circumferentially along the second bracket 321 are also formed on the outer peripheral surface of the second bracket 321. The first rib and the second rib are spaced apart and define the guide groove, which can guide the high-temperature fluid ejected from the first battery cell 21 to flow away from the injection source.

[0122] In some implementations, please refer to Figure 12 Within the receiving cavity 101, a third receiving slot 102 and a fourth receiving slot 103 are also formed on the receiving box 1. The third receiving slot 102 is configured to correspond to the first receiving slot 2211, with a portion of the first battery cell 21 received in the first receiving slot 2211 and the other portion of the first battery cell 21 received in the third receiving slot 102. The fourth receiving slot 103 is configured to correspond to the second receiving slot 3211, with a portion of the second battery cell 31 received in the second receiving slot 3211 and the other portion of the second battery cell 31 received in the fourth receiving slot 103. Thus, the third receiving slot 102 can cooperate with the first receiving slot 2211 to limit the first battery cell 21, and the fourth receiving slot 103 can cooperate with the second receiving slot 3211 to limit the second battery cell 31, improving the installation stability of the first battery cell 21 and the second battery cell 31.

[0123] In some implementations, please refer to Figure 3The first busbar assembly 22 includes a first bracket 221, the second busbar assembly 32 includes a second bracket 321, and the battery management system module 5 includes a printed circuit board with a battery management system chip. The printed circuit board is connected to the first bracket 221 and the second bracket 321. In this configuration, the battery management system module 5 is also mechanically connected to the first battery module 2 and the second battery module 3, further improving the stability of the positional relationship between the battery management system module 5 and the first battery module 2, and between the battery management system module 5 and the second battery module 3. This, in turn, improves the reliability of the electrical connection between the battery management system module 5 and the first battery module 2, and the reliability of the electrical connection between the battery management system module 5 and the second battery module 3.

[0124] As an example, a first mounting post 2215 is integrally formed on the first bracket 221, and the printed circuit board is connected to the first mounting post 2215; a second mounting post 3215 is integrally formed on the second bracket 321, and the printed circuit board is also connected to the second mounting post 3215.

[0125] In some implementations, please refer to Figure 1 and Figure 12 The housing 1 includes a housing body 11 and a cover 12. The cover 12 is placed on the housing body 11, and the cover 12 and the housing body 11 together define the housing cavity 101. In this way, when assembling the battery 100, the first battery module 2 and the second battery module 3 can be installed into the housing body 11 first, and then the cover 12 can be placed on the housing body 11, which simplifies the assembly process.

[0126] In some implementations, please refer to Figure 2 Both the first battery module 2 and the second battery module 3 are horizontally arranged within the receiving cavity 101. Optionally, both the first battery module 2 and the second battery module 3 are supported on the housing 11.

[0127] In some implementations, please refer to Figure 1 Battery 100 is a battery pack.

[0128] In some implementations, the battery pack is a low-voltage battery pack with an output voltage less than or equal to 48V. For example, battery 100 can be a 12V low-voltage battery pack, a 24V low-voltage battery pack, or a 48V low-voltage battery pack.

[0129] In some implementations, the low-voltage battery pack is a starter battery pack. A starter battery pack, also known as a starting power supply, is a power source used to provide initial power to a device or system to start it up. As an example, a starter battery pack includes an automotive starter power supply.

[0130] Secondly, please see Figure 13This application embodiment also provides an electrical device 200, which includes the battery 100 as described above.

[0131] The power device 200 includes the battery 100 described above, and the power device 200 has all the beneficial effects of the battery 100 described above, which will not be repeated here.

[0132] It should be noted that the electrical device 200 includes, but is not limited to, at least one of a vehicle and a processing tool. For example, a vehicle includes a vehicle, an aircraft, etc.; a processing tool includes an electric drill, an electric screwdriver, etc.

[0133] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A battery (100), characterized in that, include: A container (1) having a receiving cavity (101); A first battery module (2) is disposed in the receiving cavity (101). The first battery module (2) includes a first battery cell (21) and a first busbar assembly (22) that are electrically connected. The first battery cell (21) extends in a first direction in the receiving cavity (101). The first battery cell (21) has a first explosion-proof valve (212) at its end in the first direction. A second battery module (3) is disposed in the receiving cavity (101). The second battery module (3) includes a second battery cell (31) and a second busbar assembly (32) that are electrically connected. The second battery cell (31) extends in the receiving cavity (101) along a second direction. The end of the second battery cell (31) in the second direction has a second explosion-proof valve (312). The second direction intersects with the first direction.

2. The battery (100) according to claim 1, characterized in that, The first busbar assembly (22) includes a first bracket (221) and a first busbar (222), the first busbar (222) is disposed on the first bracket (221), and the first busbar (222) is connected to the first battery cell (21); The second busbar assembly (32) includes a second bracket (321) and a second busbar (322), the second busbar (322) is disposed on the second bracket (321), and the second busbar (322) is connected to the second battery cell (31).

3. The battery (100) according to claim 2, characterized in that, The first busbar (222) is connected to the second busbar (322).

4. The battery (100) according to claim 3, characterized in that, The first bracket (221) is adjacent to the second bracket (321); in the first direction, one end of the first bracket (221) faces the second bracket (321); in the second direction, one side of the first bracket (221) protrudes from one end of the second bracket (321); The first busbar (222) includes a first sub-part (2221) and a second sub-part (2222) arranged at an angle. The first sub-part (2221) is disposed on one end of the first bracket (221) and is connected to the first battery cell (21). The second sub-part (2222) extends away from the first bracket (221). The second busbar (322) includes a third sub-section (3221) and a fourth sub-section (3222) arranged at an angle. The third sub-section (3221) is disposed on one end of the second bracket (321) and is connected to the second battery cell (31). The fourth sub-section (3222) extends away from the second bracket (321) and is connected to the second sub-section (2222).

5. The battery (100) according to claim 2, characterized in that, A first receiving slot (2211) is formed on the first support (221), and the first battery cell (21) is at least partially received in the first receiving slot (2211); A second receiving slot (3211) is formed on the second support (321), and the second battery cell (31) is at least partially received in the second receiving slot (3211).

6. The battery (100) according to claim 5, characterized in that, A first adhesive layer (23) is disposed inside the first receiving slot (2211), and the first battery cell (21) is bonded to the first bracket (221) through the first adhesive layer (23); and / or, The second receiving slot (3211) is provided with a second adhesive layer (33), and the second battery cell (31) is bonded to the second bracket (321) through the second adhesive layer (33).

7. The battery (100) according to claim 5, characterized in that, The first bracket (221) includes two first end plates (2212) spaced apart along the first direction. At least one of the first end plates (2212) has a first clearance hole (2213) communicating with the first receiving groove (2211). The first battery cell (21) has a first terminal (211), which is correspondingly disposed with respect to the first clearance hole (2213). The first busbar (222) extends at least partially onto the first end plate (2212), which has the first clearance hole (2213). The first busbar (222) is connected to the first terminal (211). The second bracket (321) includes two second end plates (3212) spaced apart along the second direction. At least one of the second end plates (3212) has a second clearance hole (3213) that communicates with the second receiving groove (3211). The second battery cell (31) has a second pole (311) that is correspondingly disposed with the second clearance hole (3213). The second busbar (322) extends at least partially onto the second end plate (3212). The second end plate (3212) is provided with the second clearance hole (3213), and the second busbar (322) is connected to the second pole (311).

8. The battery (100) according to claim 5, characterized in that, The first bracket (221) is adjacent to the second bracket (321), and in the first direction, the second bracket (321) is located on one side of the first bracket (221).

9. The battery (100) according to claim 8, characterized in that, The first bracket (221) has a first pressure relief hole (2214) that communicates with the first receiving groove (2211). The first pressure relief hole (2214) faces the second bracket (321). The first explosion-proof valve (212) is correspondingly arranged with the first pressure relief hole (2214).

10. The battery (100) according to claim 9, characterized in that, The first support (221) is spaced apart from the second support (321) and defines a first gap (4).

11. The battery (100) according to claim 9, characterized in that, The second bracket (321) has a thickened portion, which is provided corresponding to the first pressure relief hole (2214) in the first direction.

12. The battery (100) according to claim 9, characterized in that, A drainage portion is also formed on the outer peripheral surface of the second bracket (321), the drainage portion extends in a direction away from the first bracket (221), and the drainage portion is correspondingly provided with the first pressure relief hole (2214).

13. The battery (100) according to claim 12, characterized in that, The drainage section is a guide groove.

14. The battery (100) according to claim 5, characterized in that, Inside the receiving cavity (101), a third receiving groove (102) and a fourth receiving groove (103) are also formed on the receiving box (1); The third receiving slot (102) is configured to correspond to the first receiving slot (2211), with a portion of the first battery cell (21) received in the first receiving slot (2211) and another portion of the first battery cell (21) received in the third receiving slot (102); The fourth receiving slot (103) is configured to correspond to the second receiving slot (3211), with a portion of the second battery cell (31) received in the second receiving slot (3211) and another portion of the second battery cell (31) received in the fourth receiving slot (103).

15. The battery (100) according to any one of claims 1 to 14, characterized in that, The battery (100) also includes a battery management system module (5) disposed in the receiving cavity (101), and the first busbar assembly (22) and the second busbar assembly (32) are both connected to the battery management system module (5).

16. The battery (100) according to claim 15, characterized in that, The first busbar assembly (22) includes a first bracket (221), the second busbar assembly (32) includes a second bracket (321), and the battery management system module (5) includes a printed circuit board with a battery management system chip, the printed circuit board being connected to the first bracket (221) and the second bracket (321).

17. The battery (100) according to any one of claims 1 to 14, characterized in that, Both the first cell (21) and the second cell (31) are cylindrical cells.

18. The battery (100) according to any one of claims 1 to 14, characterized in that, The battery (100) also includes a third explosion-proof valve (6) disposed on the housing (1), the third explosion-proof valve (6) being connected to the housing (101).

19. The battery (100) according to any one of claims 1 to 14, characterized in that, The container (1) includes a container body (11) and a cover (12), the cover (12) covering the container body (11), and the cover (12) and the container body (11) together define the container cavity (101).

20. The battery (100) according to any one of claims 1 to 14, characterized in that, The first battery cell (21) is fixedly connected to the first busbar assembly (22); the second battery cell (31) is fixedly connected to the second busbar assembly (32).

21. The battery (100) according to any one of claims 1 to 14, characterized in that, The battery (100) is a battery pack.

22. The battery (100) according to claim 21, characterized in that, The battery pack is a low-voltage battery pack, and the output voltage of the low-voltage battery pack is less than or equal to 48V.

23. The battery (100) according to claim 22, characterized in that, The low-voltage battery pack is a startup battery pack.

24. An electrical appliance (200), characterized in that: Includes the battery (100) as described in any one of claims 1 to 23.

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