Battery module, battery device and energy storage equipment

Abstract

The utility model relates to a battery module, a battery device and energy storage equipment. The battery module comprises a plurality of battery units arranged along a first direction. Each battery cell includes a plurality of battery cells stacked in a second direction perpendicular to the first direction. Wherein the battery monomer comprises a connecting surface with a connecting unit. The connecting surfaces of the single batteries in the same battery unit are arranged in the same direction; and the connecting surfaces of the single batteries in different battery units are arranged back to back or in the same direction. The battery monomers in the battery module are stacked to form the battery units, and then the battery units are arranged according to the direction different from the stacking direction of the battery monomers, so that the battery module is obtained. Under the same volume, the arrangement mode of the battery module enables the battery monomers to be more compact during connection, the volume of the battery module is reduced, and the energy density and the power density of the battery module are improved.

Description

Technical Field

[0001] This application relates to the field of battery energy storage technology, and in particular to a battery module, battery device and energy storage equipment. Background Technology

[0002] Battery modules are widely used in energy storage systems or uninterruptible power supplies (UPS). A battery module typically connects several individual battery cells in series or parallel via connectors to provide higher power and voltage. The battery module is placed within the battery pack, providing protection and ensuring normal operation under various conditions, thus improving its safety and stability and extending its lifespan.

[0003] However, the current assembly methods for battery modules and battery devices are complex, the connections are cumbersome, the heat dissipation is poor, and the assembled battery devices are large in size and have low energy density. Utility Model Content

[0004] Therefore, it is necessary to provide a battery module, battery device, and energy storage device that is easy to assemble, small in size, and has good heat dissipation.

[0005] In a first aspect, this disclosure provides a battery module, which includes at least one battery cell group, the battery cell group including two battery cells arranged along a first direction, the battery cell including multiple battery cells, the battery cells being stacked along a second direction perpendicular to the first direction, and the battery cells including a connecting surface with connecting units; wherein:

[0006] In the same battery cell, the connection surfaces of each battery cell are arranged in the same direction; in different battery cells, the connection surfaces of each battery cell are arranged in opposite directions or in the same direction.

[0007] In some embodiments, when the battery module includes multiple battery cell groups, each battery cell group is arranged along a third direction, which is perpendicular to both the first and second directions.

[0008] In some embodiments, the battery module further includes an end plate, which includes a first end plate and a second end plate. The first end plate is disposed on a first end face of each battery cell in a second direction, and the first end face is perpendicular to the connection surface of each battery cell. The second end plate is disposed on a second end face of each battery cell opposite to the first end face.

[0009] In some embodiments, a conductive connection bar is installed on the second end plate, and different battery cells are connected in series through the conductive connection bar.

[0010] In some embodiments, each battery cell further includes a heat dissipation surface, which is a surface adjacent to both the connection surface and the end face of each battery cell; the end plate is provided with grooves spaced apart along a first direction; the battery module further includes a winding member, which is wound around the battery module along the grooves.

[0011] In some embodiments, the end plate is a split end plate or an integral end plate; when the end plate is a split end plate, the end plate includes a first sub-plate, a second sub-plate and an intermediate plate, the first sub-plate and the second sub-plate are disposed on both sides of the first end face or the second end face along a first direction, and the first sub-plate and the second sub-plate are fixedly connected by the intermediate plate.

[0012] In some embodiments, the individual battery cells are connected in series to lead out battery electrodes; an electrode post is provided at the end corner of the first end plate, the first end of the electrode post is connected to the battery electrode, and the second end of the electrode post is connected to an external electrode terminal; wherein, the battery electrode includes a positive electrode and a negative electrode, the electrode post includes a positive electrode post and a negative electrode post, the positive electrode is connected to the positive electrode post, and the negative electrode is connected to the negative electrode post.

[0013] In some embodiments, the connection unit is provided with a sampling signal terminal; the battery unit also includes a signal acquisition line, which is provided on the side of the battery unit where the connection unit is located and extends to the side of the first end plate; the sampling signal terminal of each battery cell in the same battery unit is connected to the signal acquisition line, and the signal acquisition line is also connected to the first signal terminal.

[0014] In some embodiments, when the first end plate is a split end plate, the positive terminal is disposed on the first daughter plate and the negative terminal is disposed on the second daughter plate.

[0015] In a second aspect, this disclosure provides a battery device, including a battery module as provided in the first aspect above. The battery device also includes a housing and a housing top cover. The housing forms a first accommodating cavity for accommodating the battery module, and the housing top cover is disposed at the opening of the housing. The housing top cover has an opening at its center, and a signal connection structure is provided at the opening. The housing top cover is offset from the side of the housing, and the housing top cover and the side wall of the housing enclose a second accommodating cavity for accommodating the signal connection structure.

[0016] In some embodiments, the signal connection structure includes a signal adapter plate disposed on the top cover of the enclosure, a second signal terminal disposed on a first side of the signal adapter plate, and a first signal terminal disposed on a second side of the signal adapter plate; the first side of the signal adapter plate faces a second direction, and the second side of the signal adapter plate faces away from the first side of the signal adapter plate; the first signal terminal is connected to the signal acquisition line of the battery module; the signal adapter plate is disposed on the top cover of the enclosure by a support member, and a second sealing gasket with a surrounding opening is provided between the signal adapter plate and the top cover of the enclosure.

[0017] In some embodiments, the top cover of the housing is provided with an electrode post through hole for inserting an electrode post. The electrode post through hole is sealed by a first sealing structure. The first sealing structure includes an electrode post cover, an open insulating element, and a first sealing gasket. The first sealing gasket is sleeved on the electrode post. The electrode post cover cooperates with the open insulating element, the top cover of the housing, and the first sealing gasket to seal the electrode post through hole.

[0018] In some embodiments, the first sealing gasket includes a first abutment portion and a sealing rib that are offset from each other. The sealing rib extends partially along the inner circumference of the first sealing gasket in a second direction. The pole cap includes a cap body and a limiting boss. The cap body forms a first limiting groove and a second limiting groove that communicate with the limiting boss and the top cover of the housing, respectively. A channel is formed between the top cover of the housing and the limiting boss. The open insulating member includes a second abutment portion, a connecting portion, and a limiting portion. The second abutment portion and the connecting portion form an opening. The limiting portion passes through the channel and is limited by the first limiting groove and the second limiting groove. The second abutment portion abuts against the first abutment portion and is sealed with sealant between itself and the top cover of the housing. The connecting portion is stopped by the limiting boss.

[0019] In some embodiments, the battery device further includes an insulating plate that matches each battery cell and covers the connection surfaces of all individual battery cells in each battery cell.

[0020] In some embodiments, the housing includes a mounting surface, which is any surface parallel to the heat dissipation surface of the battery module, and the battery module is fixedly connected to the mounting surface; a heat-conducting component is provided between the mounting surface and the battery module, the heat-conducting component is a heat-conducting component made of elastic material, and the heat-conducting component fills the gap between the mounting surface and the heat dissipation surface.

[0021] In some embodiments, the bottom of the housing is provided with a vent that communicates with the first accommodating cavity, and the vent extends through the bottom of the housing along the thickness of the bottom of the housing.

[0022] Thirdly, this disclosure provides an energy storage device including a battery device as described in the second aspect above, and the energy storage device further includes a power device connected to the battery device.

[0023] In the aforementioned battery modules, battery devices, and energy storage devices, the battery module includes at least one group of battery cells, and the battery power group includes two battery cells arranged along a first direction. Each battery cell includes multiple individual battery cells, which are stacked along a second direction perpendicular to the first direction. Each individual battery cell includes a connection surface with a connection unit. The connection surfaces of the individual battery cells in the same battery cell are arranged in the same direction; the connection surfaces of the individual battery cells in different battery cells are arranged opposite to or in the same direction. This application stacks the individual battery cells in a battery module to form a battery cell, and then arranges the battery cells according to a direction different from the stacking direction of the individual battery cells to obtain a battery module. The battery module disclosed in this application has a simple connection and is easy to assemble. For the same volume, the battery device formed according to the battery module of this application has a more compact connection of individual battery cells due to the arrangement in the battery module, reducing the volume of the battery device and increasing the energy density and power density of the battery device. The battery device of this application is independently set up, has good heat dissipation, and is independently set up from the power device to avoid mutual interference with the power device, improving the safety and reliability of the energy storage device. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the 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.

[0025] Figure 1 This is a schematic diagram of the structure of a battery module in one embodiment. Figure 1 ;

[0026] Figure 2 This is a schematic diagram of the structure of a battery module in one embodiment. Figure 2 ;

[0027] Figure 3 This is a schematic diagram of a split end plate of a battery module according to one embodiment;

[0028] Figure 4 A schematic diagram of a battery device according to one embodiment. Figure 1 ;

[0029] Figure 5 An exploded view of a battery device according to one embodiment;

[0030] Figure 6 A schematic diagram of a battery device according to one embodiment. Figure 2 ;

[0031] Figure 7 This is a schematic diagram of the first sealing structure in one embodiment.

[0032] Explanation of reference numerals in the attached figures:

[0033] 100. Battery module; 110. End plate; 112. First end plate; 1122. First daughter plate; 1124. Second daughter plate; 1126. Intermediate plate; 114. Conductive connector; 116. Second end plate; 122. Groove; 132. Positive terminal post; 134. Negative terminal post; 140. First sealing gasket; 1402. First abutment part; 1404. Sealing rib;

[0034] 210. Battery unit; 220. Battery cell; 232. Connecting unit; 2322. Sampling signal terminal; 2324. Signal acquisition line;

[0035] 300. Enclosure; 310. Enclosure top cover; 320. First accommodating cavity; 330. Opening; 332. Second accommodating cavity; 334. Signal connection structure; 3342. Signal adapter board; 3344. First signal terminal; 3346. Second signal terminal; 3348. Support member; 336. Second sealing gasket; 340. Through hole of pole post; 350. First sealing structure; 352. Opening insulating member; 3522. Second abutment part; 3524. Connecting part; 3526. Limiting part; 354. Pole post cover; 3542. Cover body; 3544. Limiting boss; 360. Insulating plate; 370. Mounting surface; 380. Discharge port. Detailed Implementation

[0036] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0038] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0039] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0040] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0041] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0042] To address the issues of large size and low energy and power density in current battery modules, a battery module 100 is proposed in some embodiments. This battery module 100 includes at least one battery cell group, which comprises two battery cells 210 arranged along a first direction. Each battery cell 210 includes multiple individual battery cells 220. The individual battery cells 220 are stacked along a second direction perpendicular to the first direction. Each individual battery cell 220 includes a connection surface with a connection unit 232. The connection surfaces of the individual battery cells 220 within the same battery cell 210 are aligned in the same direction. The connection surfaces of the individual battery cells 220 in different battery cells 210 are either aligned in opposite directions or in the same direction.

[0043] Please refer to Figure 1 The diagram shows a battery module 100. Figure 1 As shown, the first direction is the Y-axis direction, the second direction is the Z-axis direction, and the first direction is perpendicular to the second direction. Figure 1As shown, the battery module 100 includes a battery cell group, which comprises two battery cells 210 arranged along a first direction. Each battery cell 210 includes four battery cells 220, which are stacked along a second direction. The battery module 100 of this embodiment has a compact structure, small size, and high energy density. The connection unit 232 represents the connection structure when the battery cell 220 is connected to the outside. The battery cell 220 realizes the transmission of electrical energy and battery-related information, such as battery voltage and temperature signals, through the connection unit 232. In this embodiment, the surface of the battery cell 220 with the connection unit 232 is called the connection surface. In the same battery cell 210, the connection surfaces of each battery cell 220 are arranged in the same direction. In different battery cells 210, the connection surfaces of each battery cell 220 are arranged opposite to each other or in the same direction.

[0044] A "same-direction" arrangement means that the connection surfaces of the battery cells 220 stacked in a certain battery cell 210 face the same direction. A "opposite-direction" arrangement means that the connection surfaces of the battery cells 220 in different battery cells 210 face opposite directions. For example... Figure 1 As shown, two battery units 210 are arranged sequentially along the Y-axis, and each battery unit 210 includes four battery cells 220 stacked along the Z-axis. The connection surfaces of the battery cells 220 in the same battery unit 210 are arranged in the same direction. The connection surfaces of the battery cells 220 in two battery units 210 are arranged opposite to each other.

[0045] In some other implementations, the battery module 100 may include multiple battery cell groups, each battery cell group being arranged along a third direction, which is perpendicular to both the first and second directions.

[0046] At this time, the third direction is the X-axis or the opposite direction of the X-axis. The battery cell groups are arranged along this third direction, ensuring that the connection surfaces of the individual cells in adjacent battery cell groups face the same direction, facilitating the connection of the battery module 100. For example, when the battery module 100 includes two battery cell groups, the two battery cell groups are... Figure 1 Based on the battery module 100 shown, the battery cells are arranged along the X-axis. Each battery cell group includes two battery cells 210 with their connection surfaces facing away from each other. In different battery cell groups arranged side by side along the X-axis, the connection surfaces of the battery cells 210 face each other.

[0047] In this embodiment, battery cells 220 in the battery module 100 are stacked to form battery units 210, and then the battery units 210 are arranged in a direction different from the stacking direction of the battery cells 220 to obtain the battery module 100. The battery module 100 of this embodiment has a compact structure, reducing the volume of the battery module 100. Within the same volume, the battery module 100 of this embodiment can include more battery cells 220, thereby improving the energy density and power density of the battery module 100.

[0048] In some embodiments, the battery module 100 further includes an end plate 110. The end plate 110 includes a first end plate 112 and a second end plate 116. The first end plate 112 is disposed on a first end face of each battery cell 210 in a second direction. The first end face is perpendicular to the connection surface of each battery cell 220. The second end plate 116 is disposed on a second end face of each battery cell 210 opposite to the first end face.

[0049] Please continue to refer to Figure 1 A schematic diagram of the battery module 100 is shown. The battery module 100 also includes end plates 110. The end plates 110 are disposed at both ends of the battery module 100 and are fixedly connected to the battery cells 220.

[0050] End plates 110 are respectively disposed at both ends of the battery module 100 in the second direction, i.e. Figure 1 The battery module 100 has two end faces along the Z-axis and in the opposite direction to the Z-axis. The end plate 110 on the first end face along the Z-axis is called the first end plate 112, and the end plate 110 on the second end face in the opposite direction to the Z-axis is called the second end plate 116.

[0051] The end plate 110 is used to protect the individual battery cells 220, improve the stability of the battery module 100, prevent damage to the individual battery cells 220 due to vibration, collision, or external forces during use, improve the safety of the battery module 100, and fix and constrain the individual battery cells 220. Simultaneously, the end plate 110 is also typically equipped with connection structures for connecting the individual battery cells 220, thereby enabling connections between the individual battery cells 220. For example, the end plate 110 may be provided with signal interfaces, electrode interfaces, etc., of the battery management system.

[0052] In other embodiments, a conductive connection bar 114 is mounted on the second end plate 116. Different battery cells 210 are connected in series via the conductive connection bar 114. The conductive connection bar 114 is made of a conductive material, such as copper or aluminum.

[0053] Please refer to Figure 2 The diagram shows the structure of the battery module 100. A conductive connection bar 114 is mounted on the second end plate 116. Figure 1As shown, the battery cells 220 of the same battery unit 210 are connected in series on the connection surfaces arranged in the same direction, and different battery cells 210 are connected by conductive connection bars 114.

[0054] In some embodiments, each battery cell 210 further includes a heat dissipation surface. The heat dissipation surface is a surface of each battery cell 210 that is adjacent to both the connection surface and the end surface.

[0055] Please continue to refer to Figure 1 The battery unit 210 also includes a heat dissipation surface. The heat dissipation surface is adjacent to both the end face and the connecting surface of the battery unit 210. Figure 1 The YZ plane of the coordinate axis is shown. The battery cell 220 generates a significant amount of heat during operation. In this embodiment, the battery cell 220 includes a large heat dissipation surface, which can improve the heat dissipation efficiency of the battery module 100.

[0056] In some embodiments, the end plate 110 is provided with grooves 122 spaced apart along a first direction. The battery module 100 also includes a winding member, which is wound around the battery module 100 along the grooves 122.

[0057] The end plate 110 of the battery module 100 is provided with a plurality of grooves 122. The grooves 122 are spaced apart along a first direction, namely the Y-axis direction in the figure. A winding member is provided in the groove 122. The winding member is wound around the battery module 100 along the grooves 122 on the end plate 110.

[0058] The wrapping material tightly secures the individual battery cells 220 in the battery unit 210 together, preventing displacement or loosening of the battery cells 220 during use. Especially when the battery module 100 experiences vibration or impact, the wrapping material ensures the stable arrangement of the battery cells 220, avoiding battery damage or poor contact caused by loosening or displacement. For example, the wrapping material can be a lightweight strap such as a nylon bag, or a rigid strap such as a metal strip. It can be understood that the wrapping material is wound around the battery module 100, meaning that in addition to being mounted on the end plate 110, the wrapping material also contacts the heat dissipation surface of the battery module 100.

[0059] In some embodiments, the end plate 110 is a split end plate or a single end plate. When the end plate 110 is a split end plate, the end plate 110 includes a first sub-plate 1122, a second sub-plate 1124, and an intermediate plate 1126. The first sub-plate 1122 and the second sub-plate 1124 are disposed at both ends of the first end face or the second end face along a first direction. The first sub-plate 1122 and the second sub-plate 1124 are fixedly connected by the intermediate plate 1126.

[0060] In this embodiment, the end plate 110 of the battery module 100 can be a split end plate or an integral end plate. Figure 3The diagram shows a split end plate 110. When the end plate 110 is a split end plate, the first sub-plate 1122 and the second sub-plate 1124 are located at the two ends of the first or second end face of the battery module 100 along the first direction, i.e., the Y-axis. The relative positions between the first sub-plate 1122 and the second sub-plate 1124 are not limited. Figure 3 For example, a second sub-plate 1124 is set at one end along the Y-axis, and a first sub-plate 1122 is set at the other end along the opposite direction of the Y-axis. The first sub-plate 1122 and the second sub-plate 1124 are fixedly connected by an intermediate plate 1126.

[0061] In some other embodiments, a first sub-plate 1122 may be provided at one end along the Y-axis direction, and a second sub-plate 1124 may be provided at the other end along the opposite direction of the Y-axis.

[0062] The structure of the integral end plate is as follows Figure 1 As shown, end plate 110 is a single unit. Combined with... Figure 1 and Figure 3 The integral end plate is a single structure, and the external forces and internal stresses it bears are relatively concentrated. To ensure it can withstand greater mechanical loads during use, the integral end plate has a larger wall thickness to provide sufficient strength and rigidity. The split end plate, on the other hand, includes a first sub-plate 1122, a second sub-plate 1124, and an intermediate plate 1126. During operation, stress can be distributed through different plates or additional support structures can be added to achieve the required strength. Both integral and split end plates can be formed by extrusion. Due to the larger width of the integral end plate, a larger wall thickness is required after forming to meet formability requirements. Since the split end plate is smaller in width, its wall thickness is less than that of the integral end plate. The split end plate offers high flexibility, is easy to maintain, and is lightweight. While the integral end plate is heavier, it has higher strength and is suitable for use in environments susceptible to external impacts.

[0063] In some embodiments, the individual battery cells 220 are connected in series to form battery electrodes. An electrode post is provided at one end of the first end plate 112. The first end of the electrode post is connected to the battery electrode, and the second end of the electrode post is connected to an external electrode terminal. Specifically, the battery electrode includes a positive electrode and a negative electrode. The electrode post includes a positive electrode post 132 and a negative electrode post 134. The positive electrode is connected to the positive electrode post 132, and the negative electrode is connected to the negative electrode post 134.

[0064] Please continue to refer to Figure 1 The battery cells 220 are connected in series at the connection surface to form battery electrodes. To facilitate external connection, electrode posts are provided on the first end face of the battery electrodes. The battery electrodes include a positive electrode and a negative electrode. Correspondingly, the electrode posts also include a positive electrode post 132 and a negative electrode post 134.

[0065] The battery electrodes are led out through series-connected battery cells 220 and connected to electrode posts on the end plate. The electrode posts are located at the corners of the first end plate 112, respectively positioned on both sides of the first end face facing the Y-axis and the opposite direction of the Y-axis, and closer to the side of the first end face facing the opposite direction of the X-axis, facilitating connection to the battery electrodes led out from the battery cells 220. The positive and negative electrode posts can be arbitrarily distributed as needed. Figure 1 As shown, a negative terminal 134 is positioned at the corner along the Y-axis, and a positive terminal 132 is positioned at the corner in the opposite direction of the Y-axis. In some other embodiments, the positive terminal 132 may also be positioned at the corner along the Y-axis, and the negative terminal 134 at the corner in the opposite direction of the Y-axis. It can be understood that the positive terminal 132 is connected to the positive terminal of the battery, and the negative terminal 134 is connected to the negative terminal of the battery.

[0066] In some embodiments, the connection unit 232 of the connection surface is also provided with a sampling signal terminal 2322. The battery unit 210 also includes a signal acquisition line 2324. The signal acquisition line 2324 is provided on the side of the battery unit 210 where the connection unit 232 is provided, and extends to the side of the first end plate 112; the sampling signal terminal 2322 of each battery cell 220 in the same battery unit 210 is connected to the signal acquisition line 2324, and the signal acquisition line 2324 is also connected to the first signal terminal 3344.

[0067] Please continue to refer to Figure 1 The connection unit 232 is equipped with a sampling signal terminal 2322. The sampling signal terminal 2322 samples the signals from each battery cell 220 to transmit the sampled signals. For example... Figure 1 As shown, the sampling signal terminal 2322 corresponds to each battery cell 220. To improve the reliability of signal acquisition from the battery cell 220 and to enable sampling of the same signal data, multiple sampling signal terminals 2322 can be set for the same battery cell 220. Each sampling signal terminal 2322 is connected to a signal acquisition line 2324. The signal acquisition line 2324 can be a signal conduit, located on the side of the battery cell 210 where the connection unit 232 is located, and extends to the side of the first end plate 112. The signal acquisition line 2324 leads out the data acquired through the connected sampling signal terminal 2322 and finally extends to the side of the first end plate 112 to connect with external devices.

[0068] The first signal terminal 3344 is used to indicate a signal terminal that needs to be connected to the battery module 100. The first signal terminal 3344 can be a signal connection terminal on an external device or a signal connection terminal of a power conversion device connected to the battery module 100.

[0069] Please continue to refer to Figure 3In some embodiments, when the first end plate 112 is a split end plate, the positive terminal 132 is disposed on the first daughter plate 1122 and the negative terminal 134 is disposed on the second daughter plate 1124.

[0070] The electrode posts are respectively located at the two ends of the first end plate 112 to facilitate optimized electrical connections. Therefore, when the end plate 110 is a split end plate, the positive electrode post 132 and the negative electrode post 134 are respectively located on different daughter plates.

[0071] In some embodiments, such as Figure 4-5 As shown, a battery device is provided, which includes the battery module 100 provided in the above embodiment. The battery device also includes a housing 300 and a housing top cover 310. The housing 300 forms a first receiving cavity 320 for accommodating the battery module 100. The housing top cover 310 is disposed at the opening of the housing. The housing top cover 310 has an opening 330 at its center. A signal connection structure 334 is provided at the opening 330. The housing top cover 310 is offset from the side of the housing 300. The housing top cover 310 and the side wall of the housing 300 enclose a second receiving cavity 332 for accommodating the signal connection structure 334.

[0072] Please refer to Figure 5 The diagram shows an exploded view of the battery device. The first accommodating cavity 320 is formed by the bottom and circumferential sidewalls of the housing 300. The battery module 100 proposed in the above embodiment is installed in the first accommodating cavity 320. The housing 300 has an opening along the Z-axis. A housing top cover 310 is provided at the opening of the housing 300. The housing top cover 310 is provided at the opening of the housing 300, so that the first accommodating cavity 320 forms a closed cavity.

[0073] Please continue to refer to Figure 4 The top cover 310 of the housing is offset from the peripheral side of the housing 300. The peripheral side of the housing 300 extends along the Z-axis in the figure, forming a second accommodating cavity 332 with the top cover 310 in the Z-axis direction. An opening 330 is provided at the center of the top cover 310, and a signal connection structure 334 is installed within the opening 330. It can be seen that the signal connection structure 334 is installed within the second accommodating cavity 332, enabling signal connection between the battery device and external devices. Because the signal connection structure has a certain thickness, the formation of the second accommodating cavity 332 protects the signal connection structure 334, preventing its protrusion from affecting the connection between the battery module 100 and external devices. Simultaneously, the peripheral side of the housing 300, extending along the Z-axis in the figure, can also reinforce and limit the connection when the battery module 100 is connected to external devices, improving the reliability of the connection.

[0074] In some embodiments, the signal connection structure 334 includes a signal adapter plate 3342 disposed on the top cover 310 of the housing, a second signal terminal 3346 disposed on a first side of the signal adapter plate 3342, and a first signal terminal 3344 disposed on a second side of the signal adapter plate 3342. The first side of the signal adapter plate 3342 faces a second direction, and the second side of the signal adapter plate 3342 faces away from the first side. The first signal terminal 3344 is connected to the signal acquisition line 2324 of the battery module 100. The signal adapter plate 3342 is disposed on the top cover 310 of the housing via a support member 3348, and a second sealing gasket 336 surrounding the opening 330 is provided between the signal adapter plate 3342 and the top cover 310.

[0075] Please refer to Figure 6 A schematic diagram of the battery device shown. Figure 6 for Figure 4 The battery device shown is a cross-sectional view on plane AA. (As shown) Figure 6 As shown, the top cover 310 of the enclosure has an opening 330 in the center. A signal connection structure 334 is installed within the opening 330. The signal connection structure 334 includes a signal adapter plate 3342, a first signal terminal 3344, a second signal terminal 3346, and a support member 3348. The first signal terminal 3344 and the second signal terminal 3346 are respectively located on both sides of the signal adapter plate 3342 along the Z-axis. The signal adapter plate 3342 is mounted on the top cover 310 of the enclosure via the support member 3348. The support member 3348 can be a screw. The gap between the top cover 310 of the enclosure and the signal adapter plate 3342 is sealed by a second sealing gasket 336 surrounding the opening 330. The sealing of the signal adapter structure 334 improves the safety of the battery module 100, preventing gas generated during battery charging and discharging from leaking through the opening 330, thus avoiding safety risks and improving the reliability of the battery module 100.

[0076] In some embodiments, the top cover 310 of the housing is provided with an electrode post through hole 340 for inserting an electrode post. The electrode post through hole 340 is sealed by a first sealing structure 350. The first sealing structure 350 includes an electrode post cap 354, an open insulating member 352, and a first sealing gasket 140. The first sealing gasket 140 is fitted onto the electrode post, and the electrode post cap 354 cooperates with the open insulating member 352, the top cover 310 of the housing, and the first sealing gasket 140 to seal the electrode post through hole 340.

[0077] Please continue to refer to Figure 4In addition to the opening 330 for mounting the signal connection structure 334, the top cover 310 of the housing also has electrode through holes 340 for passing through the electrode posts. The position of the electrode through holes 340 corresponds to the electrode posts in the battery module 100 and is located at the end corner of the top cover 310. It can be understood that since the electrode posts include the positive electrode post 132 and the negative electrode post 134, the electrode through holes 340 on the top cover 310 also include the electrode through holes 340 corresponding to the positive electrode post 132 and the negative electrode post 134.

[0078] Figure 7 for Figure 4 The cross-sectional view along the BB plane is shown at the electrode through-hole 340. The electrode through-hole 340 is sealed by a first sealing structure 350. The first sealing structure 350 is formed by an open insulating element 352, an electrode cap 354, and a first sealing gasket 140 in conjunction with the top cover 310 of the housing. The first sealing gasket 140 is sleeved on the electrode post, and the electrode cap 354 seals the electrode through-hole 340 in the Z-axis direction of the first sealing gasket 140. The gap between the top cover 310 of the housing and the first sealing gasket 140 is filled by the open insulating element 352.

[0079] Specifically, in some embodiments, the first sealing gasket 140 includes a first abutment portion 1402 and a sealing rib 1404 that are offset from each other. The sealing rib 1404 extends partially along the inner circumference of the first sealing gasket 140 in a second direction. The pole cap 354 includes a cap body 3542 and a limiting boss 3544. The cap body 3542 forms a first limiting groove and a second limiting groove that communicate with the limiting boss 3544 and the top cover 310 of the housing, respectively. A channel is formed between the top cover 310 of the housing and the limiting boss 3544. The open insulating member 352 includes a second abutment portion 3522, a connecting portion 3524, and a limiting portion 3526. The second abutting part 3522 and the connecting part 3524 form an opening; the limiting part 3526 is limited by the first limiting groove and the second limiting groove through the passage; the second abutting part 3522 abuts against the first abutting part 1402 and is provided with sealant between it and the top cover 310 of the box; the connecting part 3524 is stopped by the limiting boss 3544.

[0080] Please refer to Figure 7 shown Figure 4The enlarged view of the first sealing structure 350 cut in the BB direction shows that the open insulating member 352 includes a second abutting portion 3522, a connecting portion 3524, and a limiting portion 3526. The electrode post cover 354 includes a cover body 3542 and a limiting boss 3544. The cover body 3542 forms a first limiting groove and a second limiting groove communicating with the limiting boss 3544 and the top cover 310 of the housing, respectively. The limiting portion 3526 passes through the first limiting groove and the second limiting groove, and the connecting portion 3524 is stopped by the limiting boss 3544. The second abutting portion 3522 is bonded and sealed to the top cover 310 of the housing using double-sided tape or other sealant to form a first sealing surface; the second abutting portion 3522 of the open insulating member 352 abuts against the first abutting portion 1402 of the first sealing gasket 140 to form a second sealing surface; the first abutting portion 1402 of the first sealing gasket 140 forms a third sealing surface with the electrode post.

[0081] When installing the first sealing structure 350, the first sealing gasket 140 is first fitted onto the electrode post. Then, the electrode post cap 354 and the open insulating component 352 are clamped to the top cover 310 of the housing. The electrode post cap 354 is located on the side of the top cover 310 facing the Z-axis, and the open insulating component 352 is located on the side of the top cover 310 facing the opposite Z-axis. The first sealing structure 350 makes the electrode post cap 354, the top cover 310 of the housing, and the open insulating component 352 form a whole. The top cover 310 of the housing, which is connected to both the electrode post cap 354 and the open insulating component 352, is fixedly connected to the end plate 110 of the battery module 100 using screws or other connecting parts. Since the first sealing gasket 140 is made of elastic material and can be compressed, the first sealing structure 350 after being fixedly connected achieves a seal through the first sealing surface, the second sealing surface, and the third sealing surface.

[0082] In some embodiments, the battery device further includes an insulating plate 360. The insulating plate 360 ​​is matched with each battery cell 210 and covers the connection surfaces of all battery cells 220 in each battery cell 210.

[0083] Please continue to refer to Figure 5 An insulating plate 360 ​​is disposed along the side of the battery module 100 in the Y-axis direction and the opposite side in the Y-axis direction, covering the connection surface of each battery cell 220, and protecting components such as the sampling signal terminal 2322 and signal acquisition line 2324 on the connection surface of each battery cell 220. For example, the insulating plate 360 ​​can be a mica plate. The mica plate can prevent the housing 300 from contacting the connection surface of the battery cell 220, avoiding possible chemical reactions or mechanical damage, and can also effectively provide electrical isolation to ensure the stable operation of the battery module 100.

[0084] In some embodiments, the housing 300 includes a mounting surface 370. The mounting surface 370 is any surface parallel to the heat dissipation surface of the battery module 100. The battery module 100 is fixedly connected to the mounting surface 370. A heat-conducting element, which is made of an elastic material, is provided between the mounting surface 370 and the battery module 100. The heat-conducting element fills the gap between the mounting surface 370 and the heat dissipation surface.

[0085] Please continue to refer to Figure 6 The end face of the housing 300 facing the X-axis is the mounting surface 370. A mounting bracket is provided on the mounting surface 370, allowing the battery device to be mounted on any vertical surface. In this embodiment, the mounting bracket and the battery module 100 are fixedly connected by screws or other connectors. For example, long screws are used to connect the mounting bracket. Please refer to... Figure 5 The long screws are passed through the screw holes on the mounting bracket and the screw holes on the mounting surface 370 of the housing 300 in sequence, and are fixedly connected to the end plate 110 of the battery module 100 to fix the mounting bracket.

[0086] The mounting surface 370 is parallel to the heat dissipation surface of the battery module 100. A heat-conducting component is provided in the gap between the mounting surface 370 of the housing 300 and the heat dissipation surface of the battery module 100. The heat-conducting component can transfer the heat generated by the battery module 100 during operation to the housing 300 in a timely manner, so that heat exchange can occur between the housing 300 and the outside air. For example, the heat-conducting component can be a thermal pad or thermal adhesive. The thermal pad can not only perform heat exchange and heat dissipation, but also help to distribute heat evenly, avoiding excessively high temperatures in some areas, which could affect the service life and performance of the battery device.

[0087] In some embodiments, the bottom of the housing 300 is provided with a vent 380 communicating with the first accommodating cavity 320, and the vent 380 extends through the bottom of the housing 300 along the thickness of the bottom of the housing 300.

[0088] Please continue to refer to Figure 6 The vent 380 is located at the bottom of the housing 300 and extends through the bottom of the housing 300. When abnormal gas is generated inside the battery device due to overcharging, overheating, internal malfunction, or other reasons, the vent 380 can prevent the battery device from rupturing or experiencing thermal runaway due to excessive pressure, thereby enhancing the safety and stability of the battery device.

[0089] In some embodiments, an energy storage device is also provided, which includes a battery device as described in the above embodiments. The energy storage device also includes a power device connected to the battery device.

[0090] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least some embodiments or examples of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0091] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A battery module, characterized in that, The battery module (100) includes at least one battery cell group, the battery cell group including two battery cells (210) arranged along a first direction, the battery cell (210) including a plurality of battery cells (220), each battery cell (220) being stacked along a second direction perpendicular to the first direction, and each battery cell (220) including a connecting surface having a connecting unit (232); wherein: The connection surfaces of each battery cell (220) in the same battery cell (210) are arranged in the same direction; the connection surfaces of each battery cell (220) in different battery cells (210) are arranged in opposite directions or in the same direction.

2. The battery module according to claim 1, characterized in that, When the battery module (100) includes multiple battery cell groups, each battery cell group is arranged along a third direction, which is perpendicular to both the first direction and the second direction.

3. The battery module according to claim 1, characterized in that, The battery module (100) further includes an end plate (110), which includes a first end plate (112) and a second end plate (116). The first end plate (112) is disposed on a first end face of each battery cell (210) in a second direction, and the first end face is perpendicular to the connection surface of each battery cell (220). The second end plate (116) is disposed on a second end face of each battery cell (210) opposite to the first end face.

4. The battery module according to claim 3, characterized in that, A conductive connector (114) is installed on the second end plate (116), and different battery cells (210) are connected in series through the conductive connector (114).

5. The battery module according to claim 3, characterized in that, Each of the battery cells (210) further includes a heat dissipation surface, which is a surface of each battery cell (210) that is adjacent to both the connection surface and the end surface.

6. The battery module according to claim 5, characterized in that, The end plate (110) is provided with grooves (122) spaced apart along a first direction; the battery module (100) also includes a winding member, which is wound around the battery module (100) along the grooves (122).

7. The battery module according to claim 5, characterized in that, The end plate (110) is a split end plate or an integral end plate; when the end plate (110) is a split end plate, the end plate (110) includes a first sub-plate (1122), a second sub-plate (1124) and an intermediate plate (1126), the first sub-plate (1122) and the second sub-plate (1124) are disposed on both sides of the first end face or the second end face along the first direction, and the first sub-plate (1122) and the second sub-plate (1124) are fixedly connected by the intermediate plate (1126).

8. The battery module according to claim 7, characterized in that, Each of the battery cells (220) is connected in series to lead out battery electrodes; an electrode post is provided at the end corner of the first end plate (112), the first end of the electrode post is connected to the battery electrode, and the second end of the electrode post is connected to an external electrode terminal; wherein, the battery electrode includes a battery positive electrode and a battery negative electrode, the electrode post includes a positive electrode post (132) and a negative electrode post (134), the battery positive electrode is connected to the positive electrode post (132), and the battery negative electrode is connected to the negative electrode post (134).

9. The battery module according to claim 3, characterized in that, The connection unit (232) is provided with a sampling signal terminal (2322); the battery unit (210) also includes a signal acquisition line (2324), which is located on the side of the battery unit (210) where the connection unit (232) is located, and extends to the side of the first end plate (112); the sampling signal terminal (2322) of each battery cell (220) in the same battery unit (210) is connected to the signal acquisition line (2324), and the signal acquisition line (2324) is also connected to the first signal terminal (3344).

10. The battery module according to claim 8, characterized in that, When the first end plate (112) is a split end plate, the positive terminal (132) is disposed on the first sub-plate (1122), and the negative terminal (134) is disposed on the second sub-plate (1124).

11. A battery device, characterized in that, The battery device includes a battery module (100) as described in any one of claims 1-10, and further includes a housing (300) and a housing top cover (310); the housing (300) forms a first accommodating cavity (320) for accommodating the battery module (100), and the housing top cover (310) is disposed at the opening of the housing (300); the housing top cover (310) has an opening (330) at its center, and a signal connection structure (334) is provided at the opening (330); the housing top cover (310) is offset from the side of the housing (300), and the housing top cover (310) and the side wall of the housing (300) enclose a second accommodating cavity (332) for accommodating the signal connection structure (334).

12. The battery device according to claim 11, characterized in that, The signal connection structure (334) includes a signal adapter plate (3342) disposed on the top cover (310) of the enclosure, a second signal terminal (3346) disposed on the first side of the signal adapter plate (3342), and a first signal terminal (3344) disposed on the second side of the signal adapter plate (3342). The first side of the signal adapter plate (3342) faces the second direction, and the second side of the signal adapter plate (3342) is opposite to the first side of the signal adapter plate (3342). The first signal terminal (3344) is connected to the signal acquisition line (2324) of the battery module (100). The signal adapter plate (3342) is disposed on the top cover (310) of the enclosure through a support member (3348). A second sealing gasket (336) is provided between the signal adapter plate (3342) and the top cover (310) of the enclosure, surrounding the opening (330).

13. The battery device according to claim 11, characterized in that, The top cover (310) of the housing is provided with an electrode post through hole (340) for inserting an electrode post. The electrode post through hole (340) is sealed by a first sealing structure (350). The first sealing structure (350) includes an electrode post cover (354), an open insulating member (352), and a first sealing gasket (140). The first sealing gasket (140) is sleeved on the electrode post. The electrode post cover (354) cooperates with the open insulating member (352), the top cover (310) of the housing, and the first sealing gasket (140) to seal the electrode post through hole (340).

14. The battery device according to claim 13, characterized in that, The first sealing gasket (140) includes a first abutting portion (1402) and a sealing rib (1404) that are offset from each other. The sealing rib (1404) extends partially along the inner circumference of the first sealing gasket (140) in the second direction. The pole cap (354) includes a cap body (3542) and a limiting boss (3544). The cap body (3542) forms a first limiting groove and a second limiting groove that communicate with the limiting boss (3544) and the top cover (310) of the housing, respectively. The top cover (310) of the housing and the limiting boss (3544) form a first limiting groove and a second limiting groove that communicate with each other. A channel is formed between 44); the open insulating member (352) includes a second abutment (3522), a connecting part (3524) and a limiting part (3526), ​​the second abutment (3522) and the connecting part (3524) form an opening; the limiting part (3526) passes through the channel and is limited by the first limiting groove and the second limiting groove; the second abutment (3522) abuts against the first abutment (1402) and is provided with sealant between it and the top cover (310) of the box body, and the connecting part (3524) is stopped by the limiting boss (3544).

15. The battery device according to claim 11, characterized in that, The battery device also includes an insulating plate (360) that matches each of the battery cells (210) and covers the connection surfaces of all battery cells (220) in each of the battery cells (210).

16. The battery device according to claim 11, characterized in that, The housing (300) includes a mounting surface (370), which is any surface parallel to the heat dissipation surface of the battery module (100). The battery module (100) is fixedly connected to the mounting surface (370). A heat-conducting component is provided between the mounting surface (370) and the battery module (100). The heat-conducting component is made of elastic material and fills the gap between the mounting surface (370) and the heat dissipation surface.

17. The battery device according to claim 11, characterized in that, The bottom of the housing (300) is provided with a vent (380) communicating with the first accommodating cavity (320), and the vent (380) penetrates the bottom of the housing (300) along the thickness of the bottom of the housing (300).

18. An energy storage device, characterized in that, The energy storage device includes the battery device as described in any one of claims 11-17, and further includes a power device connected to the battery device.

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