Support, battery cell assembly, battery pack and electrical device

Abstract

The application belongs to the technical field of batteries, and provides a support, a battery cell assembly, a battery pack and a power utilization device. The support comprises a mounting portion and an exhaust portion. The mounting portion is used for being connected with a pole of a battery cell. The exhaust portion is connected with the mounting portion. The exhaust portion is used for covering an outer periphery of a first explosion-proof valve of the battery cell. An exhaust passage is formed on a side of the exhaust portion facing the first explosion-proof valve. The support provided in the application can make the structure of a side beam in the battery pack simpler and the safety of the battery pack higher by arranging the exhaust passage on the support.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a bracket, a cell assembly, a battery pack, and an electrical device. Background Technology

[0002] As the power of battery packs increases, the requirements for their safety performance also become increasingly stringent.

[0003] The battery pack includes a tray with a receiving cavity in which battery cell assemblies are housed. The tray has side beams with channels that can be created within them. When gas is expelled from the battery cell assemblies, the gas can escape from the battery pack through these channels. Creating channels in the side beams increases the volume and structural complexity of the beams. This increased volume reduces the space available for housing the battery cell assemblies within the battery pack, thus reducing the potential for voltage and power increases and resulting in lower space utilization. Furthermore, the presence of channels on the side beams forces the gas expelled from the battery cell assemblies to pass through other components within the receiving cavity before entering the channels, potentially causing short circuits in those components.

[0004] In related technologies, channels are set on the side beams, which makes the structure of the side beams more complex and reduces the safety of the battery pack. Utility Model Content

[0005] This application provides a bracket, a cell assembly, a battery pack, and an electrical device. By setting an exhaust channel on the bracket, the structure of the side beam in the battery pack can be simplified and the safety of the battery pack can be improved.

[0006] This application provides a bracket including a mounting part and an exhaust part. The mounting part is used to connect to the terminal post of the battery cell. The exhaust part is connected to the mounting part and is used to cover the outer periphery of the first explosion-proof valve of the battery cell. The side of the exhaust part facing the first explosion-proof valve forms an exhaust channel.

[0007] In one possible implementation, the bracket provided in this application has an exhaust section configured to be recessed away from the first explosion-proof valve of the battery cell to form an exhaust channel.

[0008] In one possible implementation, the bracket provided in this application has a first vent hole that communicates with an exhaust channel and is located on the side of the exhaust section away from the mounting section.

[0009] In one possible implementation, the bracket provided in this application has a first through hole on the mounting part for inserting the electrode post of the battery cell; a first hook is provided on the periphery of the first through hole for engaging with the electrode post.

[0010] In one possible implementation, the bracket provided in this application has a second through hole on the mounting part, the second through hole being used to pass through the sampling connector of the battery cell.

[0011] In one possible implementation, the bracket provided in this application has a second hook on the mounting part, which is used to engage with the connecting piece of the battery cell assembly.

[0012] In one possible implementation, the bracket provided in this application further includes a protective cover, which is disposed on the side of the mounting portion away from the battery cell and connected to the mounting portion; the distance between the side of the venting portion away from the battery cell and the battery cell is less than or equal to the distance between the side of the protective cover away from the battery cell and the battery cell.

[0013] This application also provides a battery cell assembly, including a plurality of battery cells and the aforementioned bracket. The plurality of battery cells are arranged along a first direction, and each battery cell has a first explosion-proof valve. The first explosion-proof valves on the plurality of battery cells are arranged side by side along the first direction. An exhaust portion extends along the first direction to cover the outer periphery of the first explosion-proof valves of the plurality of battery cells and forms an exhaust channel together with the plurality of battery cells.

[0014] In one possible implementation, the battery cell assembly provided in this application has multiple brackets arranged along a first direction, the exhaust channels in the multiple brackets are connected, and a first exhaust hole is provided on some of the brackets.

[0015] In one possible implementation, the battery cell assembly provided in this application has a first end and a second end opposite to each other along a second direction. A first explosion-proof valve of some battery cells is disposed on one side of the first end, and a first explosion-proof valve of some battery cells is disposed on one side of the second end. Multiple brackets are provided at both the first end and the second end of the battery cell assembly.

[0016] In one possible implementation, the battery cell assembly provided in this application includes a battery cell with a terminal post, the terminal post and a first explosion-proof valve arranged on the battery cell along a third direction, a mounting portion corresponding to and connected to the terminal post along a second direction, and an exhaust portion corresponding to and covering the outer periphery of the first explosion-proof valve along the second direction.

[0017] In one possible implementation, the battery cell assembly provided in this application further includes a protective cover, which is disposed on and connected to the mounting portion; the distance between the side of the venting portion away from the battery cell and the battery cell is less than or equal to the distance between the side of the protective cover away from the battery cell and the battery cell.

[0018] This application also provides a battery pack, including a tray and the aforementioned cell assembly. The tray includes a base plate and a plurality of side beams surrounding the periphery of the base plate. The base plate and the side beams form a receiving cavity, in which the cell assembly is located.

[0019] In one possible implementation, the battery pack provided in this application further includes a cover plate, which covers the receiving cavity and is connected to at least a portion of the side beam. The cover plate is in contact with the surface of the cell assembly. The bracket has a first vent hole, and the cover plate has a second vent hole, which communicates with a portion of the first vent hole.

[0020] In one possible implementation, the battery pack provided in this application includes a tray further comprising a side beam, a base plate comprising an extension, the side beam being connected to the extension and spaced apart from one of the side beams, and the battery pack further comprising a top cover covering the tray, the top cover being connected to the side beam and part of the side beam; a gap being present between the top cover and the cover plate; and a first vent and a second vent communicating with the gap.

[0021] In one possible implementation, the battery pack provided in this application has a first vent hole on the bracket and a second vent hole on the cover plate facing the top cover, and a second explosion-proof valve on the side beam and / or the top cover, with the first vent hole and / or the second vent hole communicating with the second explosion-proof valve through the gap between the top cover and the cover plate.

[0022] This application also provides an electrical device, including the above-mentioned cell assembly or the above-mentioned battery pack.

[0023] The bracket provided in this application includes a mounting section and an exhaust section. The mounting section is used to connect to the terminal post of the battery cell; the exhaust section is connected to the mounting section and covers the outer periphery of the first explosion-proof valve of the battery cell. The side of the exhaust section facing the first explosion-proof valve forms an exhaust channel. By setting an exhaust channel on the bracket, it is possible to avoid setting a channel on the side beam, which can simplify the structure of the side beam and increase its strength. The simple structure of the side beam can also reduce the space occupied by the side beam, allowing more space in the battery pack to accommodate the battery cell assembly, thereby improving the space utilization of the battery pack. Since the exhaust section covers the outer periphery of the first explosion-proof valve, the gas discharged from multiple battery cells in the battery cell assembly can directly enter the exhaust channel and be discharged along the exhaust channel. The gas does not need to pass through other components in the housing cavity, which can avoid short circuits of other components, thereby improving the safety of the battery pack. Attached Figure Description

[0024] 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the battery pack structure provided in an embodiment of this application;

[0026] Figure 2 This is an exploded view of the battery pack provided in an embodiment of this application;

[0027] Figure 3 This is a schematic diagram of the structure of the battery cell assembly provided in the embodiments of this application;

[0028] Figure 4 This is an exploded view of the battery cell assembly provided in an embodiment of this application;

[0029] Figure 5 Another exploded view of the battery cell assembly provided in the embodiments of this application;

[0030] Figure 6 This is a schematic diagram of the structure of the battery cell in the battery cell assembly provided in the embodiments of this application;

[0031] Figure 7 This is a schematic diagram of the series connection of the battery cell assembly provided in the embodiments of this application;

[0032] Figure 8 This is a schematic diagram of the structure of the bracket provided in the embodiments of this application;

[0033] Figure 9 This is a structural schematic diagram of the bracket provided in an embodiment of this application from another angle;

[0034] Figure 10 This is a schematic diagram of the battery cell assembly provided in an embodiment of this application from another angle;

[0035] Figure 11 Another exploded view of the battery pack provided in the embodiments of this application;

[0036] Figure 12 This is a schematic diagram of the internal structure of the battery pack provided in an embodiment of this application.

[0037] Explanation of reference numerals in the attached figures:

[0038] 10-Battery Pack;

[0039] 100 - Cell assembly; 100a - First terminal; 100b - Second terminal;

[0040] 110 - Battery cell; 110a - First battery cell; 110b - Second battery cell; 110c - Third battery cell; 111 - Terminal; 111a - First terminal; 111b - Second terminal; 1111 - First slot; 112 - First explosion-proof valve; 113 - Sampling connector;

[0041] 120 - Connecting piece;

[0042] 130-Standard;

[0043] 131-Installation section; 1311-First through hole; 1311a-Hook; 1312-Baffle; 1313-Accommodation area; 1314-Second hook; 1315-Second through hole; 1316-Third hook; 1317-Fourth hook;

[0044] 132 - Exhaust section; 1321 - Exhaust passage;

[0045] 133 - First exhaust port;

[0046] 140 - Sampling circuit board; 141 - First pin; 142 - Second pin;

[0047] 150 - Protective cover; 151 - Second slot;

[0048] 200-pallet;

[0049] 210 - Base plate; 211 - Extension section;

[0050] 220 - Side beam; 221 - First side beam; 222 - Second side beam; 223 - Third side beam; 224 - Fourth side beam;

[0051] 230 - Receiving cavity; 231 - Sub-receiving cavity;

[0052] 240 - Intermediate beam;

[0053] 250 - Second explosion-proof valve;

[0054] 260-Edge Beam;

[0055] 300 - Cover plate; 310 - Second vent;

[0056] 400 - Top Cover;

[0057] 500-Distribution Box;

[0058] A-gap;

[0059] D1 - First spacing; D2 - Second spacing;

[0060] X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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, 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.

[0062] 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, an indirect connection through an intermediate medium, or the internal communication of 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.

[0063] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this application.

[0064] The terms "first," "second," and "third" (if any) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0065] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such as a process, method, system, product, or maintenance tool that includes a series of steps or units, not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or maintenance tool.

[0066] As the power of battery packs increases, the requirements for their safety performance also become increasingly stringent.

[0067] The battery pack includes a tray with a receiving cavity in which the battery cell assembly is housed. The tray has side beams with channels that can be formed within them. In the event of thermal runaway in a battery cell within the assembly, the cell's explosion-proof valve opens, releasing gas from the cell. The gas diffuses within the receiving cavity and enters the channels in the side beams, from which it can be discharged outside the battery pack.

[0068] Creating channels in the side beams increases their volume and structural complexity. To ensure smooth venting, the channels occupy a larger volume, increasing the side beam's overall size and the space it occupies within the battery pack. This reduces the space available for housing the battery cells, decreasing the potential for voltage and power increases and resulting in lower space utilization. Creating channels in the side beams also reduces their strength.

[0069] Furthermore, the presence of channels on the side beams means that the gas emitted from the battery cell assembly must pass through other components in the housing cavity to enter the channels of the side beams, which can cause short circuits in other components in the housing cavity and thus damage them.

[0070] In related technologies, channels are set on the side beams, which makes the structure of the side beams more complex and reduces the safety of the battery pack.

[0071] Based on this, this application provides a bracket, a cell assembly, a battery pack, and an electrical device. By setting an exhaust channel on the bracket, the structure of the side beam in the battery pack can be simplified and the safety of the battery pack can be improved.

[0072] Figure 1 This is a schematic diagram of the battery pack structure provided in an embodiment of this application; Figure 2 This is an exploded view of the battery pack provided in an embodiment of this application.

[0073] See Figure 1 and Figure 2 As shown, the battery pack 10 includes a cell assembly 100 and a tray 200. The tray 200 includes a base plate 210 and a plurality of side beams 220 surrounding the base plate 210. The base plate 210 and the side beams 220 form a receiving cavity 230, in which the cell assembly 100 is located.

[0074] The battery pack 10 has a first direction X, a second direction Y, and a third direction Z, wherein the first direction X is the length direction of the battery pack 10, the second direction Y is the width direction of the battery pack 10, and the third direction Z is the height direction of the battery pack 10. The battery pack 10 includes a tray 200 for supporting the cell assembly 100 and other components within the battery pack 10. The tray 200 includes a base plate 210. Figure 1 and Figure 2In the illustrated embodiment, the base plate 210 is rectangular, and side beams 220 surround the four sides of the base plate 210. The side beams 220 include a first side beam 221, a second side beam 222, a third side beam 223, and a fourth side beam 224 connected in sequence. The first side beam 221 and the third side beam 223 are arranged opposite each other along the second direction Y, and the second side beam 222 and the fourth side beam 224 are arranged opposite each other along the first direction X. The first side beam 221, the second side beam 222, the third side beam 223, the fourth side beam 224, and the base plate 210 form a receiving cavity 230.

[0075] In one possible implementation, the tray 200 further includes a central beam 240 located between the first side beam 221 and the third side beam 223, dividing the receiving cavity 230 into two sub-receiving cavities 231. Each of the two sub-receiving cavities 231 is provided with a battery cell assembly 100.

[0076] Figure 3 This is a schematic diagram of the structure of the battery cell assembly provided in the embodiments of this application; Figure 4 This is an exploded view of the battery cell assembly provided in an embodiment of this application; Figure 5 Another exploded view of the battery cell assembly provided in the embodiments of this application.

[0077] See Figures 2 to 5 As shown, the battery cell assembly 100 includes a plurality of battery cells 110 arranged along a first direction X. A second side beam 222 and a fourth side beam 224 provide restraining forces to the battery cell assembly 100 along the first direction X. Therefore, the second side beam 222 and the fourth side beam 224 can be solid structures to improve their strength.

[0078] Figure 6 This is a schematic diagram of the structure of the battery cell in the battery cell assembly provided in the embodiments of this application; Figure 7 This is a schematic diagram of the series connection of the battery cell assembly provided in an embodiment of this application.

[0079] See Figures 5 to 7 As shown, the battery cell 110 includes terminals 111, which are used to electrically connect the battery cell 110 to other battery cells. Terminal 111 includes a first terminal 111a and a second terminal 111b, which are located at opposite ends of the battery cell 110 along a second direction Y. One of the first terminal 111a and the second terminal 111b is the positive terminal, and the other is the negative terminal.

[0080] Multiple 110 battery cells can be connected in series or parallel. Figure 4 , Figure 5 and Figure 7 In the illustrated embodiment, multiple battery cells 110 are connected in series. The following description uses a battery cell assembly 100 comprising three battery cells 110 as an example; please refer to [link to previous document]. Figure 7 As shown, the multiple battery cells 110 can be respectively a first battery cell 110a, a second battery cell 110b, and a third battery cell 110. The first terminal 111a of the first battery cell 110a, the second terminal 111b of the second battery cell 110b, and the first terminal 111a of the third battery cell 110c are oriented towards the same end along the second direction Y, while the second terminals 111b of the first battery cell 110a, the first terminal 111a of the second battery cell 110b, and the second terminal 111b of the third battery cell 110c are oriented towards the other end along the second direction Y.

[0081] The battery cell assembly 100 also includes multiple connecting pieces 120, the second terminal 111b of the first battery cell 110a and the first terminal 111a of the second battery cell 110b are connected by the connecting pieces 120; the second terminal 111b of the second battery cell 110b and the first terminal 111a of the third battery cell 110c are connected by another connecting piece 120, so that the multiple battery cells 110 are connected in series.

[0082] Figure 8 This is a schematic diagram of the structure of the bracket provided in the embodiments of this application; Figure 9 This is a structural schematic diagram of the bracket provided in an embodiment of this application from another angle.

[0083] See Figures 3 to 5 as well as Figure 8 and Figure 9 The battery cell assembly 100 also includes a bracket 130 connected to the battery cell 110. The bracket 130 is used to separate adjacent connecting pieces 120 to prevent short circuits between adjacent connecting pieces 120. Specifically, the bracket 130 includes a mounting portion 131 with a first through hole 1311. When the bracket 130 is mounted on the battery cell 110, the mounting portion 131 corresponds to the terminal post 111 along the second direction Y, so that the terminal post 111 can pass through the first through hole 1311 and extend out of the first through hole 1311. The side of the mounting portion 131 away from the battery cell 110 has multiple partitions 1312, which divide the mounting portion 131 into multiple receiving areas 1313. Each receiving area 1313 is provided with a connecting piece 120, thereby separating adjacent connecting pieces 120 and preventing short circuits between adjacent connecting pieces 120.

[0084] The peripheral side of a portion of the first through-hole 1311 has a first hook 1311a, and the pole post 111 is provided with a first slot 1111. The first hook 1311a is engaged in the first slot 1111, so that the bracket 130 is connected to the battery cell 110. The mounting part 131 has a second hook 1314, which is engaged on the side of the connecting piece 120 away from the bracket 130 to limit the position of the connecting piece 120.

[0085] The battery cell 110 also includes a sampling connector 113, and the mounting portion 131 also has a second through hole 1315, in which the sampling connector 113 passes. The battery cell assembly 100 also includes a sampling circuit board 140, which is located on the side of the connecting piece 120 opposite to the bracket 130 along the second direction Y. The sampling circuit board 140 includes a first pin 141 and a second pin 142. The first pin 141 is connected to the sampling connector 113, and the second pin 142 is connected to the connecting piece 120 to collect information such as the voltage of the battery cell 110. The mounting portion 131 also has a third hook 1316, which engages with the side of the sampling circuit board 140 opposite to the connecting piece 120 to limit the position of the sampling circuit board 140.

[0086] The battery cell 110 includes a first explosion-proof valve 112. The first explosion-proof valve 112 can be provided at both ends of the battery cell 110 along the second direction Y, or it can be provided at only one end along the second direction Y. Figure 5 and Figure 6 In the illustrated embodiment, the first explosion-proof valve 112 is located on one side of the first pole post 111a, and the first explosion-proof valve 112 and the first pole post 111a are arranged along the third direction Z. The first explosion-proof valves 112 of multiple battery cells 110 can be arranged side by side along the first direction X.

[0087] When the battery cell 110 decomposes its electrolyte and generates a large amount of gas due to overcharging, short circuit, high temperature, or internal malfunction, the internal pressure will rise sharply. The first explosion-proof valve 112 will automatically open when the pressure reaches a set threshold to release the gas and prevent the battery cell 110 from rupturing or exploding due to excessive pressure. The tray 200 has a second explosion-proof valve 250, and the gas discharged from the first explosion-proof valve 112 is finally discharged from the second explosion-proof valve 250 of the tray 200 to the outside of the tray 200.

[0088] In this embodiment of the application, by providing an exhaust section 132 on the bracket 130, the gas in the cell 110 can be discharged in a timely manner without increasing the structural complexity of the side beam 220, and the safety of the battery pack 10 is improved.

[0089] The specific structure of the exhaust section 132 will be described below.

[0090] Figure 10 This is a structural schematic diagram of the battery cell assembly provided in an embodiment of this application from another angle.

[0091] See Figures 8 to 10 As shown, the exhaust section 132 is connected to the mounting section 131. The exhaust section 132 is used to cover the outer periphery of the first explosion-proof valve 112 of the battery cell 110. The side of the exhaust section 132 facing the first explosion-proof valve 112 forms an exhaust channel 1321.

[0092] The exhaust portion 132 can be integrally formed with the mounting portion 131 so that the exhaust portion 132 is connected to the mounting portion 131, or the exhaust portion 132 can be welded to the mounting portion 131 so that the exhaust portion 132 is connected to the mounting portion 131. When the bracket 130 is installed on the battery cell 110, the exhaust portion 132 corresponds to the first explosion-proof valve 112 along the second direction Y and covers the outer periphery of the first explosion-proof valve 112.

[0093] The space between the side of the exhaust section 132 facing the first explosion-proof valve 112 and the first explosion-proof valve 112 forms an exhaust channel 1321. The first explosion-proof valves 112 of the multiple battery cells 110 can be arranged side by side along the first direction X, and the exhaust channel 1321 can extend along the first direction X to cover the first explosion-proof valves 112 of the multiple battery cells 110. When the gas in the battery cell 110 is discharged from the first explosion-proof valve 112, since the exhaust section 132 covers the outer periphery of the first explosion-proof valve 112, the gas discharged from the multiple battery cells 110 of the battery cell assembly 100 can directly enter the exhaust channel 1321 and flow along the exhaust channel 1321 to the second explosion-proof valve 250 for discharge. The gas does not need to pass through other components in the receiving cavity 230, which can avoid short circuits of other components, thereby improving the safety of the battery pack 10.

[0094] By setting an exhaust channel 1321 on the bracket 130, it is possible to avoid setting a channel on the side beam 221, which makes the structure of the side beam 221 simpler and the strength of the side beam 221 higher.

[0095] In addition, the simple structure of the side beam 221 can reduce the space occupied by the side beam 221, so that there is more space in the battery pack 10 to accommodate the cell assembly 100, thereby improving the space utilization rate in the battery pack 10.

[0096] In one possible implementation, the exhaust section 132 is configured to be recessed away from the first explosion-proof valve 112 of the battery cell 110 to form an exhaust passage 1321.

[0097] The venting section 132 is recessed away from the first explosion-proof valve 112 of the battery cell 110 to form an venting channel 1321, which can make the cross-sectional area of ​​the venting channel 1321 larger. This reduces the resistance to gas flow, which is conducive to the timely discharge of gas and further increases the safety of the battery pack 10.

[0098] Please continue reading Figure 8 and Figure 9 As shown, the bracket 130 is provided with a first exhaust hole 133, which is connected to the exhaust channel 1321. The first exhaust hole 133 is located on the side of the exhaust part 132 that is away from the mounting part 131.

[0099] After the gas in the exhaust channel 1321 is discharged through the first exhaust port 133, it is discharged outside the tray 200 through the second explosion-proof valve 250. The first exhaust port 133 is away from the mounting part 131, so that the first exhaust port 133 is set away from the bottom plate 210 in the third direction Z, and the airflow of the gas discharged from the first exhaust port 133 is not blocked by the side beam 220, thereby making the gas discharge process smoother.

[0100] Please continue reading Figures 3 to 5 As shown, in the battery cell assembly 100, there are multiple brackets 130, which are arranged along the first direction X. The exhaust channels 1321 in the multiple brackets 130 are connected, and some of the brackets 130 are provided with first exhaust holes 133.

[0101] When the number of battery cells 110 in the battery cell assembly 100 is large, multiple supports 130 can be provided. The multiple supports 130 are arranged sequentially along the first direction X, and the vent 132 of each support 130 covers the first explosion-proof valve 112 of multiple battery cells 110. By providing multiple supports 130, the deformation of the supports 130 can be reduced, and the assembly of the supports 130 and the battery cells 110 can be facilitated.

[0102] The exhaust channels 1321 in these supports 130 are interconnected. Figures 3 to 5 In the embodiment shown, the exhaust channels 1321 of the plurality of brackets 130 arranged sequentially along the first direction X are aligned along the first direction X, so that the exhaust channels 1321 of these brackets 130 are connected to each other.

[0103] Therefore, by providing the first vent hole 133 only on a portion of the support 130, the gas in the vent channels 1321 of multiple supports 130 can be smoothly discharged, while simplifying the structure of a portion of the support 130. Figures 3 to 5 In the embodiment shown, a first vent 133 is provided on the bracket 130 located at both ends of the cell assembly 100 along the first direction X.

[0104] Please continue reading Figures 3 to 5 As shown, the battery cell assembly 100 has a first end 100a and a second end 100b opposite to each other along the second direction Y. A first explosion-proof valve 112 of a portion of the battery cell 110 is disposed on the side of the first end 100a, and a first explosion-proof valve 112 of a portion of the battery cell 110 is disposed on the side of the second end 100b. Both the first end 100a and the second end 100b of the battery cell assembly 100 are provided with multiple brackets 130.

[0105] The first explosion-proof valve 112 and the first terminal post 111a are located on the same side of the battery cell 110. Therefore, after multiple battery cells 110 are connected in series, the first explosion-proof valve 112 of some battery cells 110 in the battery cell assembly 100 is located on the side of the first end 100a, and the first explosion-proof valve 112 of some battery cells 110 is located on the side of the second end 100b. A bracket 130 can be provided on both the first end 100a and the second end 100b of the battery cell assembly 100. The exhaust part 132 on the bracket 130 on the first end 100a side covers the first explosion-proof valve 112 facing the first end 100a to form an exhaust channel 1321; the exhaust part 132 on the bracket 130 on the second end 100b side covers the first explosion-proof valve 112 facing the second end 100b to form another exhaust channel 1321. Thus, the gas discharged from the first explosion-proof valves 112 at both ends of the battery cell assembly 100 can be discharged through different exhaust channels 1321.

[0106] Please continue reading Figures 3 to 5 as well as Figure 10 As shown, in one possible embodiment, the battery cell assembly 100 further includes a protective cover 150, which is disposed on and connected to the mounting portion 131; the distance between the side of the vent portion 132 facing away from the battery cell 110 and the battery cell 110 is less than or equal to the distance between the side of the protective cover 150 facing away from the battery cell 110 and the battery cell 110.

[0107] The mounting part 131 has a fourth hook 1317, and the protective cover 150 has a second slot 151. The fourth hook 1317 is engaged with the second slot 151 to connect the protective cover 150 to the mounting part 131. The protective cover 150 is placed on the sampling circuit board 140 to protect the sampling circuit board 140.

[0108] Please continue reading Figure 10 As shown, the distance between the side of the exhaust section 132 facing away from the battery cell 110 and the battery cell 110 is the first distance D1, and the distance between the side of the protective cover 150 facing away from the battery cell 110 and the battery cell 110 is the second distance D2. The first distance D1 is less than or equal to the second distance D2. Therefore, setting the exhaust channel 1321 on the bracket 130 will not increase the size of the battery cell assembly 100 along the second direction Y. Thus, there is no need to change the size of the tray 200.

[0109] Figure 11 Another exploded view of the battery pack provided in the embodiments of this application; Figure 12 This is a schematic diagram of the internal structure of the battery pack provided in an embodiment of this application.

[0110] See Figure 2 , Figure 11 and Figure 12As shown, the battery pack 10 also includes a cover plate 300, which covers the receiving cavity 230 and is connected to at least a portion of the side beam 220. The cover plate 300 is in contact with the surface of the cell assembly 100. The cover plate 300 has a second vent 310, which communicates with a portion of the first vent 133.

[0111] The cover plate 300 and the base plate 210 of the tray 200 are arranged opposite each other along the third direction Z. One end of the cover plate 300 along the first direction X is connected to the second side beam 222, and the other end of the cover plate 300 along the first direction X is connected to the fourth side beam 224. The cover plate 300 and the base plate 210 are attached to the two opposing surfaces of the cell assembly 100 along the third direction Z, and the cover plate 300 and the base plate 210 provide a restraining force to the cell assembly 100 along the third direction Z.

[0112] The cover plate 300 covers part of the first exhaust hole 133 on the bracket 130. Therefore, a second exhaust hole 310 needs to be opened on the cover plate 300. The second exhaust hole 310 is connected to the first exhaust hole 133 covered by the cover plate 300 so that the gas in the exhaust channel 1321 can be discharged smoothly.

[0113] Please continue reading Figure 2 , Figure 11 and Figure 12 As shown, the tray 200 also includes a side beam 260, and the base plate 210 includes an extension 211. The side beam 260 is connected to the extension 211 and spaced apart from one of the side beams 220. The battery pack 10 also includes a top cover 400, which covers the tray 200 and is connected to the side beam 260 and part of the side beam 220. There is a gap A between the top cover 400 and the cover plate 300. The first vent 133 on the bracket 130 and the second vent 310 on the cover plate 300 are disposed toward the top cover 400. The second explosion-proof valve 250 is disposed on the side beam 260, and the first vent 133 and / or the second vent 310 communicate with the second explosion-proof valve 250 through the gap A between the top cover 400 and the cover plate 300.

[0114] The base plate 210 extends along the second direction Y towards one end of the first side beam 221 to form an extension 211, and the side beam 260 is connected to the extension 211. The space between the first side beam 221 and the side beam 260 can be used to install the distribution box 500.

[0115] The top cover 400 is placed over the tray 200 and is connected to the side beam 260, the second side beam 222, the third side beam 223, and the fourth side beam 224. The distance between the top cover 400 and the bottom plate 210 is greater than the distance between the cover plate 300 and the bottom plate 210, resulting in a gap A between the top cover 400 and the cover plate 300.

[0116] See Figure 1and Figure 12 As shown, a second explosion-proof valve 250 is provided on the side beam 260. Gas in the exhaust channel 1321 enters the gap A between the cover plate 300 and the upper cover 400 after passing through the first exhaust hole 133 or through the first exhaust hole 133 and the second exhaust hole 310. Then, the gas flows through the gap A between the cover plate 300 and the upper cover 400 to the position of the second explosion-proof valve 250 and is discharged from it. Figure 1 Other emission paths are shown by dashed lines with arrows. It can be seen that the emission paths of the gas do not flow through other components in the cell assembly 100, thereby reducing damage to other components in the cell assembly 100.

[0117] This application also provides an electrical device, including the battery cell assembly 100 or the battery pack 10 provided in the above embodiments. The structures of the battery cell assembly 100 and the battery pack 10 have been described in detail in the above embodiments and will not be repeated here.

[0118] Electrical equipment can be vehicles, aircraft, ferries, computers, or energy storage cabinets that use battery power. Vehicles can be electric vehicles (EVs), pure electric vehicles (PEVs / BEVs), hybrid electric vehicles (HEVs), range-extended electric vehicles (REEVs), plug-in hybrid electric vehicles (PHEVs), or new energy vehicles.

[0119] The cell assembly 100 can be assembled into a battery pack 10 to power electrical equipment, or the cell assembly 100 can be used alone to power electrical equipment.

[0120] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A support, characterized in that, include: Mounting part (131), which is used to connect to the terminal (111) of the battery cell (110); An exhaust section (132) is connected to the mounting section (131). The exhaust section (132) is used to cover the outer periphery of the first explosion-proof valve (112) of the battery cell (110). The side of the exhaust section (132) facing the first explosion-proof valve (112) forms an exhaust channel (1321).

2. The bracket according to claim 1, characterized in that, The exhaust section (132) is configured to be recessed away from the first explosion-proof valve (112) of the battery cell (110) to form the exhaust channel (1321).

3. The bracket according to claim 2, characterized in that, The bracket (130) is provided with a first exhaust hole (133), which is connected to the exhaust channel (1321). The first exhaust hole (133) is located on the side of the exhaust part (132) away from the mounting part (131).

4. The bracket according to claim 1, characterized in that, The mounting part (131) has a first through hole (1311) for passing through the terminal post (111) of the battery cell (110); a first hook (1311a) is provided on the periphery of the first through hole (1311) for engaging with the terminal post (111).

5. The bracket according to claim 1, characterized in that, The mounting part (131) has a second through hole (1315) for passing through the sampling connector (113) of the battery cell (110).

6. The bracket according to claim 1, characterized in that, The mounting part (131) is provided with a second hook (1314), which is used to engage with the connecting piece (120) of the battery cell assembly (100).

7. The stent according to any one of claims 1 to 6, characterized in that, It also includes a protective cover (150), which covers the side of the mounting portion (131) away from the battery cell (110) and is connected to the mounting portion (131); the distance between the side of the vent portion (132) away from the battery cell (110) and the battery cell (110) is less than or equal to the distance between the side of the protective cover (150) away from the battery cell (110) and the battery cell (110).

8. A battery cell assembly, characterized in that, The device includes a plurality of battery cells (110) and a bracket (130) as described in any one of claims 1 to 7. The plurality of battery cells (110) are arranged along a first direction. Each battery cell (110) has a first explosion-proof valve (112). The first explosion-proof valves (112) on the plurality of battery cells (110) are arranged side by side along the first direction. The exhaust portion (132) extends along the first direction to cover the outer periphery of the first explosion-proof valves (112) of the plurality of battery cells (110) and together with the plurality of battery cells (110) forms the exhaust channel (1321).

9. The cell assembly according to claim 8, characterized in that, There are multiple brackets (130), which are arranged along a first direction. The exhaust channels (1321) in the multiple brackets (130) are connected, and a first exhaust hole (133) is provided on some of the brackets (130).

10. The cell assembly according to claim 9, characterized in that, The battery cell assembly (100) has a first end (100a) and a second end (100b) opposite each other along a second direction. The first explosion-proof valve (112) of a portion of the battery cell (110) is disposed on the side of the first end (100a), and the first explosion-proof valve (112) of a portion of the battery cell (110) is disposed on the side of the second end (100b). Both the first end (100a) and the second end (100b) of the battery cell assembly (100) are provided with a plurality of brackets (130).

11. The cell assembly according to claim 8, characterized in that, The battery cell (110) includes a terminal post (111), the terminal post (111) and the first explosion-proof valve (112) are arranged on the battery cell (110) along a third direction, the mounting part (131) corresponds to and is connected to the terminal post (111) along a second direction, and the venting part (132) corresponds to the first explosion-proof valve (112) along the second direction and covers the outer periphery of the first explosion-proof valve (112).

12. A battery pack, characterized in that, The device includes a tray (200) and a cell assembly (100) as claimed in any one of claims 8 to 11, the tray (200) including a base plate (210) and a plurality of side beams (220) surrounding the base plate (210), the base plate (210) and the side beams (220) forming a receiving cavity (230), in which the cell assembly (100) is located.

13. The battery pack according to claim 12, characterized in that, It also includes a cover plate (300) that covers the receiving cavity (230) and is connected to at least a portion of the side beam (220). The cover plate (300) is in contact with the surface of the cell assembly (100). The bracket (130) has a first vent hole (133), and the cover plate (300) has a second vent hole (310) that communicates with a portion of the first vent hole (133).

14. The battery pack according to claim 13, characterized in that, The tray (200) further includes a side beam (260), the base plate (210) includes an extension (211), the side beam (260) is connected to the extension (211) and spaced apart from one of the side beams (220), the battery pack (10) further includes a top cover (400), the top cover (400) covers the tray (200), the top cover (400) is connected to the side beam (260) and part of the side beam (220); there is a gap between the top cover (400) and the cover plate (300); the first vent (133) and the second vent (310) communicate with the gap.

15. The battery pack according to claim 14, characterized in that, The first vent (133) on the bracket (130) and the second vent (310) on the cover plate (300) are disposed toward the upper cover (400), and the side beam (260) and / or the upper cover (400) have a second explosion-proof valve (250), and the first vent (133) and / or the second vent (310) communicate with the second explosion-proof valve (250) through the gap between the upper cover (400) and the cover plate (300).

16. An electrical appliance, characterized in that, This includes the cell assembly (100) as described in any one of claims 8 to 11 or the battery pack (10) as described in any one of claims 12 to 15.

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