Battery module, battery pack and electric device

Abstract

The utility model discloses a battery module, a battery pack and a power utilization device, the battery module comprises a first output electrode and a second output electrode, the polarity of the first output electrode is different from that of the second output electrode, and the first output electrode and the second output electrode are suitable for being electrically connected with a power distribution module; the battery module comprises at least two layers of battery assemblies, the at least two layers of battery assemblies are arranged in a stacked mode in the first direction, each layer of battery assembly comprises a plurality of single batteries arranged in the second direction, every two adjacent layers of battery assemblies are electrically connected, and the first output electrodes and the second output electrodes are arranged in the first direction and the second direction in a staggered mode respectively. The second direction is perpendicular to the first direction. According to the battery module provided by the embodiment of the utility model, the use safety of the battery module can be improved while the working performance of the battery module is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery module, a battery pack and an electric device. Background Art

[0002] In the prior art, in order to reasonably distribute electric energy and make the circuit of the battery module operate more conveniently, a distribution box is usually set, and the distribution box is set to be electrically connected to the positive and negative electrodes of the battery module.

[0003] However, the positive and negative electrodes of the existing battery module are prone to arc discharge, reducing the use safety of the battery module. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, the first object of the utility model is to provide a battery module, which can avoid the arc discharge of the positive and negative electrodes of the battery module to a certain extent while realizing the electrical connection with the distribution box, so as to improve the use safety of the battery module, and solve the technical problem that the positive and negative electrodes of the battery module in the prior art are prone to arc discharge, resulting in low safety performance of the battery module.

[0005] The second object of the utility model is to provide a battery pack with the above battery module.

[0006] The third object of the utility model is to provide an electric device with the above battery pack.

[0007] According to the battery module of the embodiment of the utility model, the battery module includes a first output electrode and a second output electrode, the polarities of the first output electrode and the second output electrode are different, and the first output electrode and the second output electrode are adapted to be electrically connected to a power distribution module; the battery module includes at least two layers of battery components, the at least two layers of battery components are arranged in a stacked manner in a first direction, each layer of battery component includes a plurality of battery cells arranged in a second direction, adjacent two layers of battery components are electrically connected, the first output electrode and the second output electrode are respectively arranged in a staggered manner in the first direction and the second direction, and the second direction is perpendicular to the first direction.

[0008] According to the battery module of the embodiment of the present utility model, by providing a first output electrode and a second output electrode with different polarities, and setting the first output electrode and the second output electrode to be electrically connected to the power distribution module, the electrical connection between the battery module and the power distribution module is realized, so that the battery module can operate safely and stably, thereby ensuring the working performance of the battery module; at the same time, by setting the first output electrode and the second output electrode to be misaligned in the first direction and the second direction respectively, it can be ensured that there is a certain distance between the first output electrode and the second output electrode, thereby avoiding the occurrence of arcing phenomenon to a certain extent and improving the use safety of the battery module.

[0009] In some embodiments, each layer of the battery assembly includes multiple groups of battery cell groups arranged at intervals, and each group of the battery cell groups includes multiple battery cells arranged in the second direction; the first output electrode and the second output electrode are respectively located in different groups of the battery cell groups.

[0010] In some embodiments, in the second direction, the first output electrode and the second output electrode are located in the outermost two groups of the battery cell groups; in the first direction, the first output electrode and the second output electrode are located in the outermost two layers of the battery assemblies.

[0011] In some embodiments, the battery cell extends in a third direction, and the battery cell is provided with a first electrode and a second electrode in the third direction, and adjacent two battery cells are electrically connected through the first electrode or the second electrode, and the third direction is perpendicular to the first direction and the second direction.

[0012] In some embodiments, the at least two layers of battery assemblies include a first layer of battery assembly and a second layer of battery assembly respectively arranged at opposite ends of the battery module in the first direction. In the second direction, the first electrode or the second electrode of the battery cell located at the end of the first layer of battery assembly forms the first output electrode, and the first electrode or the second electrode of the battery cell located at the other end of the second layer of battery assembly forms the second output electrode.

[0013] In some embodiments, each layer of the battery assembly has a connection electrode electrically connected to the adjacent layer of the battery assembly, and the connection electrode is arranged near the middle of the battery module in the second direction.

[0014] In some embodiments, the first electrode or the second electrode of one of the battery cells near the middle of the battery module in the second direction forms the connection electrode.

[0015] The battery pack according to an embodiment of the present utility model includes: a housing; a battery module, where the battery module is the aforementioned battery module, and the battery module is disposed inside the housing.

[0016] For the battery pack according to an embodiment of the present utility model, by adopting the aforementioned battery module, the working performance of the battery pack can be guaranteed, and the use safety of the battery pack can be improved.

[0017] In some embodiments, the battery pack further includes a power distribution module, and the power distribution module is disposed inside the housing and electrically connected to the first output electrode and the second output electrode.

[0018] In some embodiments, the power distribution module includes a box body, and an electrical connecting member is disposed inside the box body, and the electrical connecting member is used for electrically connecting the battery components of adjacent layers.

[0019] In some embodiments, the battery cell extends along a third direction, the power distribution module is located on one side of the battery cell in the third direction, and the third direction is perpendicular to the first direction and the second direction.

[0020] In some embodiments, each layer of the battery components includes multiple groups of battery cell groups arranged at intervals, each group of battery cell groups includes multiple battery cells arranged in the second direction; a partition beam is provided between adjacent two groups of battery cell groups.

[0021] In some embodiments, the partition beam facing the pressure relief structure of the battery cell is formed as a heat insulation beam, and the heat insulation beam is configured to block heat transfer between adjacent two groups of battery cell groups.

[0022] In some embodiments, each layer of the battery components includes multiple groups of battery cell groups arranged at intervals along the second direction and multiple groups of battery cell groups arranged at intervals along the third direction, and the third direction is perpendicular to the first direction and the second direction; the partition beam includes a first partition beam extending along the second direction, and a first pressure relief channel communicating with the pressure relief structure of the battery cell is formed between the first partition beam or between the first partition beam and the battery cell.

[0023] In some embodiments, the partition beam further includes a second partition beam extending along the third direction, and a second pressure relief channel is provided inside the second partition beam, and the second pressure relief channel communicates the first pressure relief channel and the pressure relief valve of the battery pack.

[0024] In some embodiments, the pressure relief valve is provided on at least one side wall of the housing in the third direction.

[0025] In some embodiments, a third pressure relief channel is formed inside the side wall of the housing or between the housing and the battery module, and at least a part of the second pressure relief channel communicates with the pressure relief valve through the third pressure relief channel.

[0026] In some embodiments, the battery pack further includes a heat exchange component, and at least a part of the heat exchange component is disposed between adjacent two layers of the battery components.

[0027] In some embodiments, the heat exchange component includes a heat exchange element and a conveying element. The heat exchange element is disposed between adjacent two layers of the battery components, and the conveying element is communicated with the heat exchange element for conveying a heat exchange medium to the heat exchange element.

[0028] The electrical device according to an embodiment of the present invention includes the aforementioned battery pack.

[0029] By adopting the aforementioned battery pack, the electrical device according to an embodiment of the present invention can ensure the working performance of the electrical device and improve the use safety of the electrical device.

[0030] The additional aspects and advantages of the present invention will become apparent in the following description or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0032] Figure 1 is a schematic diagram of a battery pack according to some embodiments of the present invention.

[0033] Figure 2 is an exploded view of a battery pack according to some embodiments of the present invention.

[0034] Figure 3 is a top view of a battery pack according to some embodiments of the present invention with some structures omitted.

[0035] Figure 4 is Figure 3 a cross-sectional view taken along line A-A.

[0036] Figure 5 is Figure 4 a partial enlarged view of region I in

[0037] Figure 6 is a top view of the first layer of battery components assembled to the base according to some embodiments of the present invention.

[0038] Figure 7 is a top view of the second layer of battery components assembled to the base according to some embodiments of the present invention.

[0039] Reference numerals:

[0040] 1000, battery pack;

[0041] 100, battery module;

[0042] 110, first output member; 120, second output member;

[0043] 130, battery assembly;

[0044] 131, battery cell group; 1311, battery cell;

[0045] 132, first layer battery assembly;

[0046] 133, second layer battery assembly;

[0047] 134, third output member;

[0048] 200, power distribution module;

[0049] 300, housing;

[0050] 310, first accommodation cavity; 320, second accommodation cavity;

[0051] 330, base; 340, upper cover; 350, sealing cover; 360, plug-in member;

[0052] 400, partition beam;

[0053] 410, first partition beam;

[0054] 420, second partition beam; 421, second pressure relief channel; 422, wire routing channel;

[0055] 500, first pressure relief channel;

[0056] 600, heat exchange assembly; 610, heat exchange member; 620, conveying member;

[0057] 700, connecting member; 800, limiting plate; 900, restraining beam. Detailed implementation manners

[0058] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0059] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0060] The battery module 100 according to an embodiment of the present utility model will be described below with reference to the accompanying drawings of the specification.

[0061] The battery module 100 according to an embodiment of the present utility model includes: a first output electrode and a second output electrode, the polarities of the first output electrode and the second output electrode are different, and the first output electrode and the second output electrode are adapted to be electrically connected to the power distribution module 200. That is to say, when the first output electrode is the positive electrode, the second output electrode is the negative electrode, and when the first output electrode is the negative electrode, the second output electrode is the positive electrode. In this way, when the first output electrode and the second output electrode are respectively electrically connected to the power distribution module 200, the electrical connection between the power distribution module 200 and the battery module 100 can be realized, so as to facilitate the use of the power distribution module 200 to provide a stable power supply, and the power distribution by the power distribution module 200 and the safety of the battery module 100 can be ensured, etc.

[0062] Therefore, the first output electrode and the second output electrode mentioned here can also be understood as the total positive electrode and the total negative electrode of the battery module 100.

[0063] In some embodiments, in combination with Figure 1 and Figure 2 as shown, the battery module 100 includes a first output member 110 and a second output member 120. The first output member 110 connects the first output electrode and the battery module 100 to lead out the first output electrode, so as to facilitate the electrical connection between the first output electrode and the power distribution module 200 and reduce the difficulty of electrically connecting the first output electrode to the power distribution module 200; the second output member 120 connects the second output electrode and the battery module 100 to lead out the second output electrode, so as to facilitate the electrical connection between the second output electrode and the power distribution module 200 and reduce the difficulty of electrically connecting the first output electrode to the power distribution module 200, thereby reducing the difficulty of electrically connecting the battery module 100 to the power distribution module 200.

[0064] Among them, the first output member 110 and the second output member 120 mentioned here can be connecting copper bars, busbars, etc.

[0065] In combination withFigure 2 and Figure 3 As shown in Figure 3 , the battery module 100 includes at least two layers of battery components 130, and the at least two layers of battery components 130 are arranged in a stacked manner in the first direction. Each layer of battery component 130 includes a plurality of battery cells 1311, and the plurality of battery cells 1311 are arranged in the second direction. Adjacent two layers of battery components 130 are electrically connected, and the first output electrode and the second output electrode are respectively arranged in a staggered manner in the first direction and the second direction, and the second direction is perpendicular to the first direction. Among them, the first direction mentioned here can be understood as the Figure 2 up and down direction shown in Figure 2 , and the second direction can be understood as the Figure 2 left and right direction shown in Figure 2 .

[0066] That is to say, the battery module 100 includes at least two layers of battery components 130 arranged in a stacked manner in the up and down direction of the battery module 100, and adjacent two layers of battery components 130 are electrically connected. Each layer of battery component 130 includes a plurality of battery cells 1311 arranged in the left and right direction of the battery module 100. In this way, the occupied space of the battery module 100 can be rationally utilized, so that the battery module 100 can have multiple layers of battery components 130, and each layer includes a plurality of battery cells 1311, that is, the battery module 100 has a relatively large number of battery cells 1311, which is convenient for improving the capacity of the battery module 100 and ensuring the working performance of the battery module 100.

[0067] In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0068] In some embodiments, the plurality of battery cells 1311 of each layer of battery component 130 are electrically connected through a first electrical connector, so as to facilitate the formation of the battery component 130 and ensure the capacity of the battery module 100.

[0069] Among them, the first electrical connector mentioned here can be a connecting copper bar or a bus bar, etc. In the battery module 100, the plurality of battery cells 1311 can be connected in series, in parallel or in a mixed connection. The mixed connection means that there are both series and parallel connections among the plurality of battery cells 1311.

[0070] At the same time, since the first output member 110 is connected to the first output electrode and the second output member 120 is connected to the second output electrode, by arranging the first output electrode and the second output electrode in a staggered manner in the first direction and the second direction respectively, it is convenient to form the first output member 110 and the second output member 120 in a staggered manner in the first direction and the second direction respectively (as shown in Figure 2 Figure 2 ), thereby avoiding the arcing phenomenon between the first output member 110 and the second output member 120 and improving the use safety of the battery module 100.

[0071] It should be noted that the misaligned setting in the first direction and the second direction mentioned here means that in the first direction and the second direction of the battery module 100, there is a certain distance between the first output electrode and the second output electrode, so as to maximize the distance between the first output electrode and the second output electrode, avoid the occurrence of arcing between the first output member 110 and the second output member 120, and improve the use safety of the battery module 100.

[0072] As can be seen from the above structure, the battery module 100 of the embodiment of the present invention includes a plurality of battery cells 1311 to ensure the capacity of the battery module 100 and improve the working performance of the battery module 100.

[0073] It should be noted that since there are a plurality of battery cells 1311, especially when the battery cells 1311 are short blade batteries, there is an insulation risk, which affects the safety of the battery module 100.

[0074] Based on this, the first output electrode and the second output electrode of the battery module 100 in this application are set to be misaligned in the first direction and the second direction respectively, so that the first output electrode and the second output electrode can be diagonally arranged to maximize the distance between the first output electrode and the second output electrode, avoid the occurrence of arcing, and thus improve the safety of the battery module 100.

[0075] That is to say, the battery module 100 of this application has not only a large capacity but also high safety performance.

[0076] It can be understood that compared with the prior art, the total positive electrode and the total negative electrode (the first output electrode and the second output electrode) of the battery module 100 in this application are set to be misaligned in the first direction and the second direction respectively to improve the safety of the battery module 100.

[0077] In some embodiments, the battery cell 1311 is a short blade battery. Compared with a long blade battery, the short blade battery has a high voltage and less loss in the high voltage platform.

[0078] That is to say, the battery module 100 of this application includes multiple layers of short blade batteries.

[0079] Among them, the short blade battery mentioned here refers to a blade battery with a length in the range of 400 mm to 700 mm, and the long blade battery refers to a blade battery with a length in the range of 800 mm to 1000 mm.

[0080] In some embodiments, in combination with Figure 2 and Figure 3As shown, the battery cell 1311 extends along the third direction. The battery cell 1311 is provided with a first electrode and a second electrode in the third direction. Two adjacent battery cells 1311 are electrically connected through the first electrode or the second electrode. The third direction is perpendicular to the first direction and the second direction. Herein, the third direction mentioned herein can be understood as Figure 2 the front-back direction shown in Figure 2 . By providing the first electrode and the second electrode on the battery cell 1311 in the third direction, electrical connection can be formed between two adjacent battery cells 1311, so as to ensure the working performance of the battery module 100 and reduce the difficulty of electrical connection between the battery cells 1311.

[0081] Herein, the first electrode and the second electrode mentioned herein can be understood as the positive electrode and the negative electrode of the battery cell 1311. That is to say, one of the first electrode and the second electrode is formed as the positive electrode of the battery cell 1311, and the other is formed as the negative electrode of the battery cell 1311. The first electrode and the second electrode cooperate to achieve the electrical connection between the battery cells 1311.

[0082] Meanwhile, by arranging the battery cell 1311 to extend along the third direction, while ensuring that the battery cell 1311 has a certain extension length, it can also avoid the stress problem of the torsional working condition being transmitted to the battery cell 1311 to a certain extent, prolong the service life of the battery cell 1311, and improve the use safety of the battery cell 1311.

[0083] In some embodiments, in combination with Figure 2 and Figure 3 As shown, each layer of the battery assembly 130 includes multiple groups of battery cell groups 131 arranged at intervals. Each group of battery cell groups 131 includes multiple battery cells 1311 arranged in the second direction. That is to say, the battery module 100 of the present application has multiple layers of battery assemblies 130. Each layer of the battery assembly 130 has multiple groups of battery cell groups 131. Each group of battery cell groups 131 has multiple battery cells 1311, so that the battery module 100 has multiple battery cells 1311, maximizing the number of battery cells 1311 in the battery module 100 and achieving the improvement of the capacity of the battery module 100.

[0084] In some embodiments, multiple battery cells 1311 within each group of battery cell groups 131 form electrical connections by cooperating with the first electrode and the second electrode, thereby forming individual battery cell groups 131. After the battery cell groups 131 are formed, the battery cell groups 131 have a first lead electrode and a second lead electrode, and the first lead electrode and the second lead electrode are formed as the positive electrode and the negative electrode of the battery cell groups 131. Adjacent groups of battery cell groups 131 located on the same layer form electrical connections through the first lead electrode and the second lead electrode to form a battery assembly 130. After the battery assembly 130 is formed, the battery assembly 130 forms a connection electrode, and the connection electrode is formed as the lead electrode of the battery assembly 130. The battery assemblies 130 of adjacent layers are electrically connected through the connection electrodes to form a battery module 100. After the battery module 100 is formed, it has a first output electrode and a second output electrode, thus facilitating the electrical connection between the battery module 100 and the power distribution module 200.

[0085] Among them, the above-mentioned first lead electrode, second lead electrode, connection electrode, first output electrode, and second output electrode are all directly formed by the first electrode or the second electrode of the battery cell 1311, reducing the difficulty of electrical connection of the battery module 100.

[0086] In some embodiments, as Figure 2 shown, each layer of the battery assembly 130 includes multiple groups of battery cell groups 131 arranged at intervals in the second direction and multiple groups of battery cell groups 131 arranged at intervals in the third direction, and the third direction is perpendicular to the first direction and the second direction. That is to say, the multiple groups of battery cell groups 131 of each layer of the battery assembly 130 are arranged along the second direction and the third direction respectively, so that each layer of the battery assembly 130 includes at least four groups of battery cell groups 131, improving the capacity of the battery module 100.

[0087] In some embodiments, within each layer of the battery assembly 130, adjacent groups of battery cell groups 131 are connected in series. In this way, while realizing the series connection of multiple groups of battery cell groups 131 in each layer of the battery assembly 130, it is also possible to avoid the extension length of the electrical connection member connecting two groups of battery cell groups 131 from being too long. On the one hand, it reduces the cost of the battery module 100 and lightens the weight of the battery module 100. On the other hand, it can also avoid the electrical connection member directly facing multiple battery cells 1311 to a certain extent, improving the safety of the battery module 100.

[0088] In some embodiments, within each layer of the battery assembly 130, adjacent groups of battery cell groups 131 are electrically connected through a second electrical connection member, and the second electrical connection member can also be a connection copper bar, a bus bar, etc.

[0089] Optionally, the first output electrode and the second output electrode are respectively located in different groups of battery cell groups 131. This can increase the distance between the first output electrode and the second output electrode, facilitating the arrangement of the first output electrode and the second output electrode to be offset in the first direction and the second direction respectively. That is, it is convenient to form the first output member 110 and the second output member 120 to be offset in the first direction and the second direction respectively (as Figure 2 shown), thereby avoiding the arcing phenomenon between the first output member 110 and the second output member 120 and improving the safety of use of the battery module 100.

[0090] In some embodiments, in the second direction, the first output electrode and the second output electrode are located in the outermost two groups of battery cell groups 131. In the first direction, the first output electrode and the second output electrode are located in the outermost two layers of battery components 130. That is, in the first direction and the second direction, the first output electrode and the second output electrode are both spaced apart and the spacing distance is relatively large, so that the first output electrode and the second output electrode are offset in the first direction and the second direction respectively, and it is beneficial to arrange the first output electrode and the second output electrode diagonally in the battery module 100 to maximize the distance between the first output electrode and the second output electrode, avoid the arcing phenomenon, and further improve the safety of the battery module 100.

[0091] Of course, in some other embodiments, it is not limited to arranging the first output electrode and the second output electrode in the outermost two groups of battery cell groups 131 and the outermost two layers of battery components 130. The first output electrode and the second output electrode can also be arranged in different groups of battery cell groups 131 and different layers of battery components 130 respectively. In this way, it can also achieve the arrangement of the first output electrode and the second output electrode to be offset in the first direction and the second direction respectively, increasing the distance between the first output electrode and the second output electrode.

[0092] In some embodiments, in combination with Figure 3 、 Figure 4 、 Figure 6 and Figure 7As shown, at least two layers of battery components 130 include a first layer of battery components 132 and a second layer of battery components 133. The first layer of battery components 132 and the second layer of battery components 133 are respectively disposed at opposite ends of the battery module 100 in the first direction. In the second direction, the first electrode or the second electrode of the battery cell 1311 located at the end of the first layer of battery components 132 forms a first output electrode, and the first electrode or the second electrode of the battery cell 1311 located at the other end of the second layer of battery components 133 forms a second output electrode. That is to say, the first output electrode is formed on the battery cell 1311 at the end of the first layer of battery components 132 in the second direction, and the second output electrode is formed on the battery cell 1311 at the other end of the second layer of battery components 133 in the second direction. Since the first layer of battery components 132 and the second layer of battery components 133 are respectively disposed at opposite ends of the battery module 100 in the first direction, the first output electrode and the second output electrode can be arranged to be spaced apart in the first direction and the second direction respectively, that is, the first output electrode and the second output electrode are arranged to be misaligned in the first direction and the second direction respectively, increasing the distance between the first output electrode and the second output electrode.

[0093] In some embodiments, each layer of battery components 130 has a connection electrode electrically connected to the adjacent layer of battery components 130, and the connection electrode is disposed near the middle of the battery module 100 in the second direction. Among them, by setting each layer of battery components 130 to have a connection electrode electrically connected to the adjacent layer of battery components 130, electrical connection can be formed between the adjacent layers of battery components 130, reducing the difficulty of electrical connection, thereby facilitating the formation of the battery module 100.

[0094] At the same time, by disposing the connection electrode near the middle of the battery module 100 in the second direction, the two connection electrodes of the adjacent layers of battery components 130 can be disposed close to each other, shortening the extension length of the electrical connector connecting the two connection electrodes, and making the electrical connection path of the two connection electrodes simple, which provides convenience for the manufacturing cost, use safety and space utilization rate of the battery pack 1000.

[0095] In some embodiments, the connection electrodes of the adjacent layers of battery components 130 are electrically connected through a third electrical connector to reduce the connection difficulty between the adjacent layers of battery components 130. Here, the third electrical connector can also be a connection copper bar, a bus bar, etc.

[0096] In the description of the present invention, the features defined as "first", "second", and "third" may explicitly or implicitly include one or more of such features, which are used to distinguish and describe features, without order or importance.

[0097] In some embodiments, in combination with Figure 1 andFigure 2 As shown in the figure, the battery module 100 includes a plurality of third output members 134, and the plurality of third output members 134 are respectively connected to the connection electrodes of the battery components 130 of each layer correspondingly, so as to lead out the connection electrodes, thereby facilitating the electrical connection of the plurality of connection electrodes and reducing the difficulty of electrical connection of the plurality of connection electrodes.

[0098] Optionally, the third output members 134 of adjacent layers are electrically connected through a third electrical connection member, so as to realize the electrical connection of the battery components 130 of adjacent layers and reduce the connection difficulty of the battery components 130 of adjacent layers.

[0099] It should be noted that by arranging the connection electrodes close to the middle of the battery module 100 in the second direction, the third output members 134 of adjacent layers can be arranged close to the middle of the battery module 100 in the second direction, that is, the third output members 134 of adjacent layers can be arranged close to each other (as Figure 2 shown), which is convenient for shortening the extension length of the third electrical connection member connecting the two third output members 134, and making the wiring of the third electrical connection member simple, providing convenience for the manufacturing cost, use safety and space utilization rate of the battery pack 1000.

[0100] In summary, the present application can solve the technical problems in the prior art that the distance between the first output electrode and the second output electrode of the multi-layer battery components 130 is too close and the length of the electrical connection member connecting the battery components 130 of adjacent layers is too long.

[0101] In some embodiments, a connection electrode is formed on the first electrode or the second electrode of one of the battery cells 1311 close to the middle of the battery module 100 in the second direction. In this way, while reducing the forming difficulty of the connection electrode, the connection electrode can be arranged close to the middle of the battery module 100 in the second direction, so that the two connection electrodes of the battery components 130 of adjacent layers can be arranged close to each other, shortening the extension length of the electrical connection member connecting the two connection electrodes.

[0102] Next, the battery pack 1000 according to the embodiment of the present invention will be described with reference to the accompanying drawings of the specification.

[0103] Combined with Figure 1 and Figure 2 shown, a battery pack 1000 according to an embodiment of the present invention includes: a housing 300 and a battery module 100.

[0104] Among them, combined with Figure 1 and Figure 2 shown, the battery module 100 is the aforementioned battery module 100, and the specific structure of the battery module 100 will not be elaborated here. The battery module 100 is arranged in the housing 300.

[0105] By arranging the battery module 100 inside the housing 300, while integrating the structure of the battery pack 1000 to reduce the volume of the battery pack 1000, it is also possible to use the housing 300 to protect and support the battery module 100, so as to extend the service life of the battery module 100, ensure the use safety of the battery module 100 to a certain extent, and at the same time make the structure of the battery module 100 stable and ensure the working performance of the battery module 100.

[0106] As can be seen from the above structure, for the battery pack 1000 according to the embodiment of the present utility model, by adopting the foregoing battery module 100, the working performance of the battery pack 1000 can be improved, the use safety of the battery pack 1000 can be ensured, and it is beneficial to extend the service life of the battery pack 1000.

[0107] In some embodiments, as shown in combination with Figure 1 and Figure 2 , the housing 300 includes a base 330 and an upper cover 340. An open first accommodation cavity 310 is formed inside the base 330, and the upper cover 340 is arranged at the opening and connected to the base 330 to form the housing 300, reducing the molding difficulty of the housing 300.

[0108] Among them, the connection mentioned here can be welding, bonding, screw connection, etc.

[0109] Optionally, as shown in combination with Figure 1 and Figure 2 , the battery module 100 is arranged inside the first accommodation cavity 310 to arrange the battery module 100 inside the housing 300 and reduce the installation difficulty of the battery module 100.

[0110] In some embodiments, as shown in combination with Figure 1 and Figure 2 , a limiting plate 800 is arranged inside the housing 300. The limiting plate 800 is arranged between the battery module 100 and the upper cover 340. The limiting plate 800 is used to limit the battery module 100 to improve the position stability of the battery module 100.

[0111] Among them, the limiting plate 800 can be fixedly connected to the battery module 100 and the upper cover 340 respectively to realize the limitation of the battery module 100 by using the limiting plate 800. The fixed connection mentioned here can be welding, bonding, screw connection, etc.

[0112] In some embodiments, as shown in combination with Figure 1 and Figure 2 , a constraint beam 900 is further arranged inside the housing 300. The constraint beam 900 is arranged between the battery module 100 and the side wall of the first accommodation cavity 310. The constraint beam 900 is used to limit the battery module 100 to further improve the position stability of the battery module 100.

[0113] Among them, the constraint beam 900 can be fixedly connected to the battery module 100 and the side wall of the first accommodation cavity 310 respectively, so as to limit the battery module 100 by using the constraint beam 900. The fixed connection mentioned here can be welding, bonding, screw connection, etc.

[0114] In some embodiments, in combination with Figure 1 and Figure 2 as shown, the battery pack 1000 further includes a power distribution module 200. The power distribution module 200 is arranged in the housing 300 and is electrically connected to the first output electrode and the second output electrode. Thereby, the electrical connection between the power distribution module 200 and the battery module 100 is realized, so as to facilitate providing a stable power supply by using the power distribution module 200, and the power distribution can be realized by using the power distribution module 200 and the safety of the battery module 100 can be ensured, etc.

[0115] At the same time, by arranging the power distribution module 200 in the housing 300, while realizing the integration of the structure of the battery pack 1000 to reduce the volume of the battery pack 1000, the housing 300 can also be used to protect and support the power distribution module 200, so as to extend the service life of the power distribution module 200, ensure the use safety of the power distribution module 200 to a certain extent, and at the same time make the structure of the power distribution module 200 stable and ensure the working performance of the power distribution module 200.

[0116] Optionally, in combination with Figure 1 and Figure 2 as shown, an open second accommodation cavity 320 is formed in the base 330, and the power distribution module 200 is arranged in the second accommodation cavity 320, so as to arrange the power distribution module 200 in the housing 300 and reduce the installation difficulty of the power distribution module 200.

[0117] Optionally, in combination with Figure 1 and Figure 2 as shown, the battery pack 1000 further includes a sealing cover 350. The sealing cover 350 is arranged at the opening of the second accommodation cavity 320, so as to protect the power distribution module 200, extend the service life of the power distribution module 200, and improve the use safety of the power distribution module 200.

[0118] In some embodiments, the power distribution module 200 is a BDU (Battery Disconnect Unit), and the power distribution module 200 can coordinate the function conversion and energy distribution of high-voltage accessories such as the motor control system, battery management system, charging management system, DC / DC converter, electric air conditioner, electric power steering, and braking system that drive the electric device, which helps to ensure the smooth operation and efficient cooperation among the various components of the electric device, not only improves the safe and stable operation of the high-voltage circuit system of the electric device, but also improves the performance and user experience of the electric device.

[0119] In some embodiments, in combination with Figure 2 and Figure 3 As shown, the battery cell 1311 extends along the third direction, and the power distribution module 200 is located on one side of the battery cell 1311 in the third direction. The third direction is perpendicular to the first direction and the second direction. So that the first output electrode and the second output electrode of the battery cell 1311 can be arranged close to the power distribution module 200, facilitating the electrical connection between the first output electrode and the second output electrode and the power distribution module 200, reducing the connection difficulty, and at the same time, the extension lengths of the first output member 110 and the second output member 120 can also be shortened, providing convenience for the manufacturing cost, use safety and space utilization rate of the battery pack 1000.

[0120] In some embodiments, in combination with Figure 1 and Figure 2 As shown, a plurality of plug connectors 360 are provided on the housing 300, and the plurality of plug connectors 360 are spaced apart in the third direction. The power distribution module 200 is electrically connected to the plug connectors 360 through the connecting member 700, facilitating the electrical connection between the power distribution module 200 and an external power supply member or an external power consumption member, reducing the electrical connection difficulty between the battery pack 1000 and the external power supply member or the external power consumption member, so that the battery pack 1000 can effectively charge and discharge, thereby ensuring the working performance of the battery pack 1000.

[0121] Optionally, the connecting member 700 is a connecting copper bar or a bus bar.

[0122] It should be noted that when the battery pack 1000 is applied to a vehicle, the third direction is the front-rear direction of the vehicle, that is, the third direction is the direction from the vehicle head to the vehicle tail. One of the two plug connectors 360 is located in the vehicle head direction, and the other is located in the vehicle head direction. The plug connector 360 located in the vehicle head direction is a discharge interface, and the plug connector 360 located in the vehicle tail direction is a fast charge interface.

[0123] Of course, in some other embodiments, it is also possible that the plug connector 360 located in the vehicle head direction is a fast charge interface, and the plug connector 360 located in the vehicle tail direction is a discharge interface.

[0124] In some embodiments, the power distribution module 200 includes a box body, and electrical connection members are provided inside the box body for electrically connecting adjacent layers of battery components 130. That is to say, it is not limited to electrically connecting adjacent layers of battery components 130 through a third electrical connection member, and adjacent layers of battery components 130 can also be electrically connected through the power distribution module 200. Since protection switches, relays, etc. are generally provided inside the box body of the power distribution module 200, the connection between adjacent layers of battery components 130 can be controlled and protected by using protection switches, relays, etc., improving the use safety of the battery module 100.

[0125] In some embodiments, in combination withFigure 3 , Figure 6 and Figure 7 As shown in Figure 3 , Figure 6 , and Figure 7 , each layer of battery assembly 130 includes multiple groups of battery cell groups 131 arranged at intervals, and each group of battery cell groups 131 includes multiple battery cells 1311 arranged in the second direction; a partition beam 400 is provided between adjacent two groups of battery cell groups 131. The partition beam 400 can make adjacent battery cell groups 131 independent of each other, thereby isolating adjacent battery cell groups 131, and to a certain extent avoiding direct contact between adjacent battery cell groups 131 to form an electrical connection, improving the use safety of the battery pack 1000.

[0126] At the same time, the partition beam 400 can also be used to limit adjacent battery cell groups 131, improving the position stability of the battery cell groups 131 to ensure the working performance of the battery cell groups 131.

[0127] In addition, the structural strength of the support-reinforced outer shell 300 can also be improved by the partition beam 400.

[0128] It should be noted that the partition beam 400 provided between adjacent two groups of battery cell groups 131 can be understood as that there is a partition beam 400 between adjacent two groups of battery cell groups 131 in each layer of battery assembly 130.

[0129] In some embodiments, the partition beam 400 is arranged inside the outer shell 300 and fixedly connected to the outer shell 300 to ensure the position stability of the partition beam 400, thereby ensuring the working performance of the partition beam 400.

[0130] In some embodiments, the partition beam 400 opposite to the pressure relief structure of the battery cell 1311 is formed as a heat insulation beam, and the heat insulation beam is configured to block the heat transfer between adjacent two groups of battery cell groups 131. In this way, the partition beam 400 can be used to block the high-temperature and high-pressure gas discharged through the pressure relief structure of the battery cell 1311, so as to prevent the high-temperature and high-pressure gas from passing through the partition beam 400 and affecting the adjacent battery cell groups 131, thereby avoiding the mutual propagation of battery cells 1311 during thermal runaway and improving the use safety of the battery pack 1000.

[0131] That is to say, the battery pack 1000 of the present application can not only relieve pressure smoothly, but also avoid the mutual influence of adjacent battery cell groups 131 during pressure relief.

[0132] It should be noted that the above-mentioned pressure relief structure can be understood as an explosion-proof valve, and the explosion-proof valve is used to open when the internal pressure of the battery cell 1311 exceeds a preset value to achieve the purpose of pressure relief and improve the use safety of the battery cell 1311. Among them, the explosion-proof valve is a well-known prior art to those skilled in the art, and the specific structure of the explosion-proof valve will not be elaborated here.

[0133] In some embodiments, the partition beam 400 facing the pressure relief structure of the battery cell 1311 is made of a heat-insulating material, so that the partition beam 400 facing the pressure relief structure of the battery cell 1311 is formed into a heat-insulating beam to reduce the risk of thermal runaway.

[0134] Of course, in some other embodiments, all the partition beams 400 can be made of heat-insulating materials. That is to say, it is not limited to setting the partition beam 400 facing the pressure relief structure of the battery cell 1311 to be made of heat-insulating materials. All the partition beams 400 can also be made of heat-insulating materials to ensure the heat-insulating effect of the partition beam 400, thereby avoiding the mutual propagation of battery cells 1311 when thermal runaway occurs and improving the use safety of the battery pack 1000.

[0135] In a specific example, the partition beam 400 is made of mica board. The mica board has a relatively high melting point, which can make the partition beam 400 form a heat-insulating beam. In this way, the heat discharged from the battery cell 1311 can be prevented from piercing through the partition beam 400 to a certain extent, thereby avoiding the mutual influence of adjacent two groups of battery cell groups 131 during pressure relief to a certain extent and ensuring the use safety of the battery pack 1000.

[0136] Optionally, as shown in Figure 3 、 Figure 6 and Figure 7 , the partition beam 400 includes a first partition beam 410 extending in the second direction. A first pressure relief channel 500 communicating with the pressure relief structure of the battery cell 1311 is formed between the first partition beam 410 or the first partition beam 410 and the battery cell 1311. In this way, the pressure discharged from the battery cell 1311 through the pressure relief structure can be discharged into the first pressure relief channel 500, and then the pressure is discharged through the first pressure relief channel 500 to reduce the pressure relief difficulty of the battery cell 1311, thereby ensuring the use safety of the battery cell 1311, that is, ensuring the use safety of the battery pack 1000.

[0137] At the same time, since the partition beam 400 is arranged between adjacent two groups of battery cell groups 131, it can also avoid the mutual influence of adjacent two groups of battery cell groups 131 during pressure relief to a certain extent, further ensuring the use safety of the battery pack 1000.

[0138] It should be noted that since the first partition beam 410 extends in the second direction, the first partition beam 410 can be used to separate multiple groups of battery cell groups 131 arranged at intervals in the third direction, so that multiple groups of battery cell groups 131 arranged at intervals in the third direction are independent of each other, ensuring the safety of the battery module 100.

[0139] In some embodiments, the first partition beam 410 is hollow inside, and a communication hole communicating with the inside of the first partition beam 410 is provided on the peripheral wall of the first partition beam 410 facing the battery cell 1311, so as to form a first pressure relief channel 500 for the pressure relief structure communicating with the battery cell 1311 inside the first partition beam 410, thereby reducing the difficulty of pressure relief of the battery cell 1311.

[0140] In other embodiments, in combination with Figure 3 、 Figure 6 and Figure 7 as shown, the first partition beam 410 and the battery cell 1311 are arranged at intervals, so as to form a first pressure relief channel 500 for the pressure relief structure communicating with the battery cell 1311 between the first partition beam 410 and the battery cell 1311, reducing the forming difficulty of the first pressure relief channel 500, thereby reducing the pressure relief difficulty of the battery cell 1311.

[0141] In some embodiments, in combination with Figure 3 、 Figure 6 and Figure 7 as shown, the partition beam 400 further includes a second partition beam 420 extending in the third direction. A second pressure relief channel 421 is provided in the second partition beam 420 (for the specific structure of the second pressure relief channel 421, reference can be made to Figure 5 ). The second pressure relief channel 421 communicates with the first pressure relief channel 500 and a pressure relief valve (not shown in the figure) of the battery pack 1000. That is to say, a pressure relief valve is provided on the battery pack 1000, and the pressure relief valve of the battery pack 1000 is communicated with the first pressure relief channel 500 through the second pressure relief channel 421. In this way, when the pressure discharged from the battery cell 1311 through the pressure relief structure reaches the first pressure relief channel 500, it can be discharged to the pressure relief valve of the battery pack 1000 through the second pressure relief channel 421, and then the pressure is discharged through the pressure relief valve of the battery pack 1000, so as to discharge the high-temperature and high-pressure gas out of the battery pack 1000 and ensure the use safety of the battery pack 1000.

[0142] At the same time, since the second partition beam 420 extends in the third direction, the second partition beam 420 can be used to separate multiple groups of battery cell groups 131 arranged at intervals in the second direction, so that multiple groups of battery cell groups 131 arranged at intervals in the second direction are independent of each other, ensuring the safety of the battery module 100.

[0143] That is to say, by using the first partition beam 410 and the second partition beam 420, the multiple battery cell groups 131 of each layer of battery assembly 130 can be separated, so that the multiple battery cell groups 131 of each layer of battery assembly 130 are independent of each other, so as to ensure the safety of the battery module 100.

[0144] In some embodiments, in combination with Figure 4 and Figure 5As shown, the second partition beam 420 is hollow inside, so as to enable the setting of a second pressure relief channel 421 inside the second partition beam 420, reduce the forming difficulty of the second pressure relief channel 421, and further reduce the pressure relief difficulty of the battery cell 1311.

[0145] In some embodiments, in combination with Figure 4 and Figure 5 As shown, a wire routing channel 422 is further formed on the second partition beam 420. The wires extending to the second partition beam 420 in the battery pack 1000 can be arranged in the wire routing channel 422, so as to fix the wires by using the wire routing channel 422 and ensure the service life and use safety of the wires.

[0146] Among them, the wires mentioned here can be any electrical connectors, and the present application does not make specific limitations.

[0147] In some embodiments, the pressure relief valve is arranged on at least one side wall of the outer shell 300 in the third direction. Since the second partition beam 420 extends in the third direction, the pressure relief valve is arranged close to the second pressure relief channel 421, so as to facilitate the connection of the first pressure relief channel 500 and the pressure relief valve of the battery pack 1000 through the second pressure relief channel 421, reduce the connection difficulty between the first pressure relief channel 500 and the pressure relief valve, which is beneficial to discharging the high-pressure gas in the first pressure relief channel 500 by using the pressure relief valve, avoiding the accumulation of high-pressure gas in the first pressure relief channel 500 and deteriorating to generate thermal runaway, and improving the use safety of the battery pack 1000.

[0148] In some embodiments, a third pressure relief channel (not shown in the figure) is formed inside the side wall of the outer shell 300 or between the outer shell 300 and the battery module 100. At least part of the second pressure relief channel 421 is connected to the pressure relief valve through the third pressure relief channel. When the pressure discharged from the battery cell 1311 through the pressure relief structure reaches the first pressure relief channel 500, it can be discharged to the pressure relief valve of the battery pack 1000 through the second pressure relief channel 421 and the third pressure relief channel respectively, and then the pressure is discharged through the pressure relief valve of the battery pack 1000, so as to discharge the high-temperature and high-pressure gas from the battery pack 1000 and ensure the use safety of the battery pack 1000.

[0149] In some embodiments, the side wall of the outer shell 300 is hollow to form a third pressure relief channel; or, a third pressure relief channel is formed by arranging the outer shell 300 and the battery module 100 at intervals.

[0150] Optionally, the third pressure relief channel is formed inside the side wall of the housing 300 away from the connector 700 or between the side wall of the housing 300 away from the connector 700 and the battery module 100. In this way, while discharging the high-pressure gas in the first pressure relief channel 500, the third pressure relief channel can be arranged away from the connector 700 to avoid the influence of high-pressure and high-temperature gas on the connector 700 and improve the safety of the battery pack 1000.

[0151] In a specific example, the pressure relief valve and the power distribution module 200 of the battery pack 1000 are arranged on the same side of the battery module 100 in the third direction. When the pressure discharged from the battery cell 1311 through the pressure relief structure enters the first pressure relief channel 500, the pressure first flows along the first pressure relief channel 500 to the second pressure relief channel 421. In the second pressure relief channel 421, the pressure flows towards the front and rear ends in the third direction respectively. Among them, the pressure flowing to the front side in the third direction can be directly discharged through the pressure relief valve of the battery pack 1000, and the pressure flowing to the rear side in the third direction first enters the third pressure relief channel, then flows from the rear to the front along the third pressure relief channel to the pressure relief valve, and finally is discharged through the pressure relief valve of the battery pack 1000 to discharge the high-temperature and high-pressure gas in the battery pack 1000 and ensure the use safety of the battery pack 1000.

[0152] In addition, by arranging the pressure relief valve and the power distribution module 200 on the same side of the battery module 100 in the third direction, the space on one side of the battery module 100 can be reasonably utilized, and to a certain extent, it is avoided that the pressure relief valve and the power distribution module 200 occupy too much space inside the housing 300, which is beneficial to improving the space utilization rate inside the housing 300 and then improving the capacity of the battery pack 1000.

[0153] In some embodiments, the pressure relief valve and the power distribution module 200 are spaced apart in the first direction and the second direction respectively, so as to avoid the influence of the high-temperature and high-pressure gas flowing through the pressure relief valve on the power distribution module 200 to a certain extent, extend the service life of the power distribution module 200, and improve the use safety of the power distribution module 200.

[0154] In some embodiments, in combination Figure 1 and Figure 2 As shown, the battery pack 1000 further includes a heat exchange component 600, and at least part of the heat exchange component 600 is arranged between adjacent two layers of battery components 130. The purpose of using the heat exchange component 600 to adjust the temperature of the battery component 130 is achieved, that is, the purpose of adjusting the temperature of the battery cell 1311 is achieved, so that the temperature of the battery cell 1311 during operation can be maintained within a suitable temperature range, ensuring the use safety of the battery cell 1311 and also ensuring the working performance of the battery cell 1311.

[0155] In some embodiments, in combinationFigure 1 and Figure 2 As shown in Figure 2 , the heat exchange assembly 600 includes a heat exchange member 610 and a conveying member 620. The heat exchange member 610 is disposed between two adjacent layers of battery assemblies 130, and the conveying member 620 is communicated with the heat exchange member 610 for conveying a heat exchange medium to the heat exchange member 610. Thus, the temperature of the battery assembly 130 can be adjusted by using the heat exchange assembly 600 to ensure the use safety and working performance of the battery cell 1311.

[0156] In some embodiments, the heat exchange member 610 is formed as a heat exchange plate. The heat exchange plate is communicated with the conveying member 620 so that the heat exchange medium can be filled in the heat exchange plate. The heat exchange medium is used for heat exchange with two adjacent layers of battery assemblies 130, and further achieves the purpose of adjusting the temperature of the battery cell 1311 by using the heat exchange assembly 600.

[0157] Optionally, the conveying member 620 is a conveying pipe for conveying a heat exchange medium toward the heat exchange member 610 to ensure the heat exchange effect of the heat exchange member 610.

[0158] Wherein, the heat exchange medium mentioned here can be a refrigerant.

[0159] In some embodiments, in combination with Figure 1 and Figure 2 As shown in Figure 2 , the conveying member 620 and the connecting member 700 are located on the same side of the battery module 100 and are spaced apart in the first direction, so as to realize the side placement of the conveying member 620 and to arrange the conveying member 620 and the connecting member 700 in the same area, effectively increasing the space utilization rate of the battery pack 1000.

[0160] In some embodiments, in combination with Figure 1 and Figure 2 As shown in Figure 2 , the battery module 100 includes two layers of battery assemblies 130. The two layers of battery assemblies 130 are stacked and arranged in the first direction. In the first direction, the battery cells 1311 in the lower-layer battery assembly 130 can be directly placed in the housing 300, and the battery cells 1311 in the upper-layer battery assembly 130 can be first assembled into a plurality of battery cell groups 131, and then placed in the housing 300 by means of hoisting, increasing the assemblability to reduce the assembly difficulty of the battery pack 1000.

[0161] The following describes the electrical device according to the embodiments of the present invention.

[0162] An electrical device according to an embodiment of the present invention includes: a battery pack 1000.

[0163] Wherein, the battery pack 1000 is the aforementioned battery pack 1000, and the specific structure of the battery pack 1000 will not be elaborated here.

[0164] As can be seen from the above structure, the electrical device according to the embodiment of the present utility model can improve the working performance of the electrical device, ensure the use safety of the electrical device, and is beneficial to extending the service life of the electrical device by adopting the aforementioned battery pack 1000.

[0165] It should be noted that the electrical device mentioned here can be, but is not limited to, mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric vehicles, ships, spacecrafts, etc.

[0166] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0167] Figure 2 Two layers of battery components 130 are shown for illustrative purposes, but those of ordinary skill in the art can clearly understand after reading the above technical solution that applying this solution to a technical solution with three or more layers of battery components 130 also falls within the protection scope of the present utility model.

[0168] The specific structures of the battery module 100, the battery pack 1000 and other components of the electrical device according to the embodiment of the present utility model, such as the power distribution module 200, are known to those of ordinary skill in the art and will not be described in detail here.

[0169] In the description of this specification, the descriptions referring to terms "embodiment", "example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0170] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A battery module, characterized in that: The battery module comprises a first output electrode and a second output electrode, the first output electrode and the second output electrode have different polarities, and the first output electrode and the second output electrode are suitable for being electrically connected to a power distribution module; The battery module includes at least two layers of battery assemblies, which are stacked and arranged in a first direction, and each layer of the battery assemblies includes a plurality of battery cells arranged along a second direction. Two adjacent layers of the battery assemblies are electrically connected, and the first output electrode and the second output electrode are staggered in the first direction and the second direction, respectively, and the second direction is perpendicular to the first direction.

2. The battery module according to claim 1, characterized in that: Each layer of the battery assembly includes a plurality of battery monomer groups arranged at intervals, and each battery monomer group includes a plurality of battery monomers arranged in the second direction; The first output electrode and the second output electrode are respectively located in different groups of the battery cell groups.

3. The battery module according to claim 2, characterized in that: In the second direction, the first output electrode and the second output electrode are located in the two outermost groups of battery cells; In the first direction, the first output electrode and the second output electrode are located in the outermost two layers of the battery assembly.

4. The battery module according to claim 3, characterized in that: The battery cell extends along a third direction, the battery cell is provided with a first electrode and a second electrode in the third direction, two adjacent battery cells are electrically connected via the first electrode or the second electrode, and the third direction is perpendicular to the first direction and the second direction.

5. The battery module according to claim 4, characterized in that: The at least two layers of battery assemblies include a first layer of battery assemblies and a second layer of battery assemblies respectively arranged at opposite ends of the battery module in the first direction. In the second direction, the first electrode or the second electrode of the battery cell located at the end of the first layer of battery assembly forms the first output electrode, and the first electrode or the second electrode of the battery cell located at the other end of the second layer of battery assembly forms the second output electrode.

6. The battery module according to claim 1, characterized in that: Each layer of the battery components has a connecting electrode electrically connected to the battery components of an adjacent layer, and the connecting electrode is arranged near the middle of the battery module in the second direction.

7. The battery module according to claim 6, characterized in that: The first electrode or the second electrode of one of the battery cells close to the middle of the battery module in the second direction forms the connecting electrode.

8. A battery pack, characterized in that: include: shell; A battery module, wherein the battery module is the battery module according to any one of claims 1 to 7, and the battery module is arranged in the shell.

9. The battery pack according to claim 8, characterized in that: It also includes a power distribution module, which is arranged in the shell and is electrically connected to the first output electrode and the second output electrode.

10. The battery pack according to claim 9, characterized in that: The power distribution module comprises a box body, an electrical connector is arranged inside the box body, and the electrical connector is used to electrically connect the battery assemblies of adjacent layers.

11. The battery pack according to claim 9, characterized in that: The battery cell extends along a third direction, and the power distribution module is located on one side of the battery cell in the third direction. The third direction is perpendicular to the first direction and the second direction.

12. The battery pack according to claim 8, characterized in that: Each layer of the battery assembly includes a plurality of battery cell groups arranged at intervals, and each battery cell group includes a plurality of battery cells arranged in the second direction; a partition beam is provided between two adjacent battery cell groups.

13. The battery pack according to claim 12, characterized in that: The separation beam facing the pressure relief structure of the battery cell is formed as a heat insulation beam, and the heat insulation beam is configured to block heat transfer between two adjacent groups of the battery cell groups.

14. The battery pack according to claim 12, characterized in that: Each layer of the battery assembly includes a plurality of battery monomer groups spaced apart along the second direction and a plurality of battery monomer groups spaced apart along a third direction, wherein the third direction is perpendicular to the first direction and the second direction; The partition beam includes a first partition beam extending along the second direction, and a first pressure relief channel provided with a pressure relief structure communicating with the battery cell is formed between the first partition beam or the first partition beam and the battery cell.

15. The battery pack according to claim 14, characterized in that: The partition beam further includes a second partition beam extending along the third direction. A second pressure relief channel is provided in the second partition beam. The second pressure relief channel is connected to the first pressure relief channel and the pressure relief valve of the battery pack.

16. The battery pack according to claim 15, characterized in that: The pressure relief valve is disposed on at least one side wall of the housing in the third direction.

17. The battery pack according to claim 15, characterized in that: A third pressure relief channel is formed in the side wall of the shell or between the shell and the battery module, and at least a portion of the second pressure relief channel is connected to the pressure relief valve through the third pressure relief channel.

18. The battery pack according to claim 8, characterized in that: It also includes a heat exchange component, at least part of which is arranged between two adjacent layers of battery components.

19. The battery pack according to claim 18, characterized in that: The heat exchange component comprises a heat exchange element and a conveying element. The heat exchange element is arranged between two adjacent layers of the battery components. The conveying element is connected to the heat exchange element to convey heat exchange medium to the heat exchange element.

20. An electrical device, characterized in that: Comprising a battery pack according to any one of claims 8-19.

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