Battery assembly and battery pack

Abstract

The application relates to the technical field of energy storage, and discloses a battery assembly and a battery pack. The battery assembly comprises an odd number of at least three battery groups arranged in sequence along a first direction. The battery group comprises an odd number of at least three batteries arranged in sequence along a second direction, the batteries are connected in sequence in series, along the second direction, in the first battery group, the first pole column of the first battery and the second pole column of the third battery serve as two output electrodes of the battery assembly, the first pole column of the third battery is electrically connected with the second pole column of the second battery, in the second battery group, the first pole column of the second battery and the second pole column of the third battery are electrically connected, and in the third battery group, the second pole column of the second battery and the first pole column of the third battery are electrically connected. Wherein, the first direction, the second direction and the third direction are perpendicular to each other in pairs. Through the above mode, the application is beneficial to miniaturization of the battery assembly and reduction of production cost.

Description

Technical Field

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

[0002] As a core energy storage unit that ensures uninterrupted operation of critical equipment, communication backup battery packs play an important role in communication networks, power systems, and smart cities due to their advantages such as high cycle life, wide temperature range adaptability, intelligent management, and modular design.

[0003] Current communication backup batteries consist of battery arrays composed of multiple batteries. In each row and column, adjacent batteries are arranged with alternating positive and negative terminals to facilitate series connection between batteries via connectors. However, in this arrangement, the starting positive terminal and the ending negative terminal of the battery array are far apart. When connecting the battery array to other devices, additional jumper wires are required to connect the distant positive or negative terminal. These additional jumper wires not only occupy space but also increase design and material costs. Utility Model Content

[0004] In view of the problems existing in the background art, the purpose of this application is to provide a battery component and battery pack that overcomes or at least partially solves the above problems.

[0005] According to a first aspect of this application, a battery assembly is provided, including a third battery pack and at least one pair of battery packs. Along a first direction, at least one pair of battery packs and the third battery pack are arranged sequentially. Each battery pack includes a first battery pack and a second battery pack arranged sequentially along the first direction. The first, second, and third battery packs each include an odd number of at least three batteries arranged sequentially along a second direction. Along the second direction, the first, second, and third batteries are respectively the first, second, and third batteries. Viewed along a third direction, each battery has a first and second electrode with opposite polarities arranged opposite to each other along the first direction at its top end. The arrangement order of the first and second electrodes of the first battery is reversed compared to that of the second and third batteries. The batteries are connected in series one by one. In the first battery pack, the first electrode of the first battery and the second electrode of the third battery serve as two output electrodes of the battery assembly. The first electrode of the third battery is electrically connected to the second electrode of the second battery. In the second battery pack, the first electrode of the second battery and the second electrode of the third battery are electrically connected. In the third battery pack, the second electrode of the second battery and the first electrode of the third battery are electrically connected. Among them, the first direction, the second direction, and the third direction are perpendicular to each other.

[0006] In one or more of the above optional embodiments, the first battery pack, the second battery pack and the third battery pack each include a fourth battery and a fifth battery. The fourth battery and the fifth battery are respectively the battery arranged in the fourth position and the battery arranged in the fifth position along the second direction. Along the second direction, starting from the fourth battery, the arrangement order between the first and second terminals of two adjacent batteries is reversed.

[0007] In one or more of the above optional embodiments, the first battery pack includes a first diagonal connecting piece, the first diagonal connecting piece includes a first connecting portion, a second connecting portion and a first extension portion, the first connecting portion and the second connecting portion extend along a second direction, in the first battery pack, one end of the first connecting portion is connected to the second terminal of the second battery, one end of the second connecting portion is connected to the first terminal of the third battery, along the second direction, the first extension portion is disposed between the first connecting portion and the second connecting portion, the first extension portion extends along a first direction, and the other end of the first connecting portion and the other end of the second connecting portion are respectively connected to the first extension portion.

[0008] In one or more of the above optional embodiments, the second battery pack includes a second diagonal connecting piece, the second diagonal connecting piece includes a third connecting portion, a fourth connecting portion and a second extension portion, the third connecting portion and the fourth connecting portion extend along a second direction, in the second battery pack, one end of the third connecting portion is connected to the first terminal of the second battery, one end of the fourth connecting portion is connected to the second terminal of the third battery, along the second direction, the second extension portion is disposed between the third connecting portion and the fourth connecting portion, the second extension portion extends along a first direction, and the other end of the third connecting portion and the other end of the fourth connecting portion are respectively connected to the second extension portion.

[0009] In one or more of the above optional embodiments, the first diagonal connecting piece and the second diagonal connecting piece are arranged in a mirror-symmetrical manner along the first direction.

[0010] In one or more of the above optional embodiments, an insulating plate and multiple connecting pieces are included. The insulating plate covers the top of each battery. The side of the insulating plate facing away from the battery is provided with multiple receiving grooves. The batteries are connected in series one by one through multiple connecting pieces. One connecting piece is provided in one receiving groove. The side wall of the receiving groove that receives the connection between the connecting piece and the battery is provided with a clearance notch. The clearance notch communicates with the receiving groove.

[0011] In one or more of the above optional embodiments, the battery assembly includes a plurality of first limiting plates and a plurality of second limiting plates, with each first limiting plate and each second limiting plate corresponding to the other. The first and second limiting plates are used to fix the battery pack housing. Along a second direction, a first limiting plate and a second limiting plate jointly clamp a first battery pack; and / or along the second direction, a first limiting plate and a second limiting plate jointly clamp a second battery pack; and / or along the second direction, a first limiting plate and a second limiting plate jointly clamp a third battery pack.

[0012] In one or more of the above optional embodiments, along a third direction, the first limiting plate has a first insertion portion at its end away from the top end of the battery, the first insertion portion being used to insert into the outer shell of the battery pack; the second limiting plate has a second insertion portion at its end away from the top end of the battery, the second insertion portion being used to insert into the outer shell of the battery pack; along a first direction, the first limiting plate and the second limiting plate have the same length, and the first insertion portion is located at the midpoint of the first limiting plate; along a second direction, the first limiting plate and the second limiting plate are aligned, and the first insertion portion and the second insertion portion are offset; and / or along a third direction, the first limiting plate has a first bending portion and a second bending portion at its end near the top end of the battery. The first bending portion is formed by bending one end edge of the first limiting plate near the top of the battery towards the second limiting plate and extending thereafter. The second bending portion is formed by bending one end edge of the first bending portion away from the first limiting plate and extending thereafter in a third direction. The second limiting plate near the top of the battery has a third bending portion and a fourth bending portion. The third bending portion is formed by bending one end edge of the second limiting plate near the top of the battery towards the first limiting plate and extending thereafter. The fourth bending portion is formed by bending one end edge of the third bending portion away from the second limiting plate and extending thereafter in a third direction. Along the first direction, the length of the second bending portion is greater than the length of the fourth bending portion.

[0013] In one or more of the above optional embodiments, the battery assembly includes multiple straps, at least one strap wrapped around a first limiting plate and a second limiting plate disposed opposite to each other. Along a first direction, the first limiting plate includes a first end and a second end disposed opposite to each other. The first end has a fifth bend, and the second end has a sixth bend. The fifth bend extends from the edge of the first end and is folded towards the second end. The sixth bend extends from the edge of the second end and is folded towards the first end. The fifth and sixth bends are used to limit the straps in a direction parallel to the third direction. And / or along the first direction, the second limiting plate includes a third end and a fourth end disposed opposite to each other. The third end has a seventh bend, and the fourth end has an eighth bend. The seventh bend extends from the edge of the third end and is folded towards the fourth end. The eighth bend extends from the edge of the fourth end and is folded towards the third end. The seventh and eighth bends are used to limit the straps in a direction parallel to the third direction.

[0014] According to a second aspect of this application, a battery pack is provided, including a housing and the aforementioned battery assembly. The housing has a receiving cavity and includes a base plate. The battery assembly is disposed within the receiving cavity, and the base plate supports the battery assembly.

[0015] The beneficial effects of the embodiments of this application are as follows: The battery assembly provided by this application sets the arrangement order between the first and second terminals of the first battery in the battery pack to be the opposite of that of the second and third batteries. In the first battery pack, the first terminal of the first battery and the second terminal of the third battery are used as the two output electrodes of the battery assembly. The first terminal of the third battery is electrically connected to the second terminal of the second battery. In the second battery pack, the first terminal of the second battery and the second terminal of the third battery are electrically connected. In the third battery pack, the second terminal of the second battery and the first terminal of the third battery are electrically connected. Compared with the arrangement and connection method of batteries in related technologies, the two output electrodes of the battery assembly of this application are located on the same side edge of the battery assembly, and the distance between the two output electrodes is relatively close, thereby saving the jumper wires, which is conducive to the miniaturization of the battery assembly and reduces the production cost. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a schematic diagram of a battery assembly in the related technology; Figure 2 This is a schematic diagram of another battery component in the related technology; Figure 3 A schematic diagram of a battery assembly provided in an embodiment of this application; Figure 4 An exploded view of a battery assembly provided in an embodiment of this application; Figure 5 A schematic diagram of a battery assembly provided in an embodiment of this application; Figure 6 A schematic diagram of another battery assembly provided in an embodiment of this application; Figure 7 A schematic diagram of another battery assembly provided in an embodiment of this application; Figure 8 A schematic diagram of another battery assembly provided in an embodiment of this application; Figure 9 A schematic diagram of a first limiting plate of a battery assembly provided in an embodiment of this application; Figure 10 A schematic diagram of a second limiting plate for a battery assembly provided in an embodiment of this application; Figure 11 A schematic diagram of a battery pack provided in an embodiment of this application; Figure 12 This is a cross-sectional schematic diagram of a battery pack provided in an embodiment of this application. Detailed Implementation

[0018] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0020] In the description of this specification, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0022] Please see Figure 1 and Figure 2 In related technologies, a communication backup battery includes fifteen batteries 11', arranged in three groups along a first direction X. Each group includes five batteries 11' arranged along a second direction Y. Each battery 11' has a positive terminal P and a negative terminal N arranged opposite each other along the first direction X at its top. Along the first direction X, the polarities of the terminals of adjacent batteries 11' are opposite, allowing them to be electrically connected by proximity. Specifically, a first connecting piece 21' connects the two terminals of adjacent batteries 11' with opposite polarities in the first direction X, and a second connecting piece 22' connects the two terminals of adjacent batteries 11' with opposite polarities in the second direction Y. With the above arrangement, after multiple batteries 11' are connected in series, the total positive terminal A and the total negative terminal B are far apart. When the battery pack composed of all batteries 11' is connected to other devices, an additional jumper wire is required to connect the total positive terminal A or the total negative terminal B located at the far end. The additional jumper wire not only occupies space but also increases design and material costs.

[0023] In view of this, this application provides a battery assembly that, by changing the arrangement of the batteries, increases the arrangement in which the polarity of the two adjacent terminals in two adjacent batteries is the same, so that after series connection, the total positive terminal and the total negative terminal of the battery assembly are both located on one side edge of the battery assembly, and the distance between the total positive terminal and the total negative terminal is short, thereby saving the jumper wires, which is beneficial to the miniaturization of the battery assembly and reduces the production cost.

[0024] Please see Figures 3-5In some embodiments, the battery assembly 100 includes a third battery pack 1c and at least one pair of battery packs 10. Along the first direction X, the at least one pair of battery packs 10 and the third battery pack 1c are arranged sequentially. The battery packs 10 include a first battery pack 1a and a second battery pack 1b arranged sequentially along the first direction X. The first battery pack 1a, the second battery pack 1b and the third battery pack 1c each include at least three batteries 11 arranged sequentially along the second direction Y in an odd number. Along the second direction Y, the first battery 11, the second battery 11 and the third battery 11 are the first battery 11a, the second battery 11b and the third battery 11c, respectively. Viewed along the third direction Z, each battery 11 has two terminals 111 at its top end with opposite polarities arranged opposite each other along the first direction X. The two terminals are a first terminal and b second terminal. The arrangement order of the first terminal a and the second terminal b of the first battery 11a is the opposite of that of the second battery 11b and the third battery 11c. The first terminal a can be the positive terminal of the battery, and the corresponding second terminal b can be the negative terminal of the battery, or the first terminal a can be the negative terminal of the battery, and the second terminal b can be the positive terminal of the battery. The first direction X, the second direction Y, and the third direction Z are all perpendicular to each other.

[0025] In some embodiments, the batteries 11 are connected in series one by one. In the first battery pack 1a, the first terminal a of the first battery 11a and the second terminal b of the third battery 11c serve as two output electrodes of the battery assembly 100, namely the first output electrode S1 and the second output electrode S2. The first terminal a of the third battery 11c is electrically connected to the second terminal b of the second battery 11b. For example, when the first terminal a is the positive terminal, the first output electrode S1 is the overall positive electrode of the battery assembly 100, and the second output electrode S2 is the overall negative electrode of the battery assembly 100. In the second battery pack 1b, the first terminal a of the second battery 11b and the second terminal b of the third battery 11c are electrically connected. In the third battery pack 1c, the second terminal b of the second battery 11b and the first terminal a of the third battery 11c are electrically connected.

[0026] The battery assembly 100 provided in this application sets the arrangement order of the first terminal a and the second terminal b of the first battery 11a in the first battery pack 1a, the second battery pack 1b, and the third battery pack 1c to be the opposite of that of the second battery 11b and the third battery 11c. In the first battery pack 1a, the first terminal a of the first battery 11a and the second terminal b of the third battery 11c are used as the two output electrodes of the battery assembly 100. The first terminal a of the third battery 11c is electrically connected to the second terminal b of the second battery 11b. In 1b, the first terminal a of the second battery 11b and the second terminal b of the third battery 11c are electrically connected. In the third battery pack 1c, the second terminal b of the second battery 11b and the first terminal a of the third battery 11c are electrically connected. Compared with the arrangement and connection of batteries 11' in related technologies, the two output electrodes of the battery pack 100 of this application are located on the same side edge of the battery pack 100, and the distance between the two output electrodes is relatively close, thereby saving the jumper wires, which is conducive to the miniaturization of the battery pack 100 and reduces the production cost.

[0027] It is understandable that the other first pole a and second pole b can be connected by proximity, and the specific connection method will be described in detail below.

[0028] In some embodiments, adjacent poles are sequentially aligned along the first direction X, and adjacent poles are sequentially aligned along the second direction Y.

[0029] In some embodiments, the battery assembly 100 includes a plurality of connecting pieces 2, the plurality of connecting pieces 2 including a first connecting piece 21, the first connecting piece 21 extending along a first direction X, the first connecting piece 21 being used to electrically connect a first terminal a and a second terminal b adjacent in the first direction X.

[0030] In some embodiments, the plurality of connecting pieces 2 include a second connecting piece 22, the second connecting piece 22 being extended along a second direction Y, and the first connecting piece 21 being used to electrically connect a first pole a and a second pole b that are adjacent in the second direction Y.

[0031] In some embodiments, the plurality of connecting pieces 2 include a first diagonal connecting piece 23. The first diagonal connecting piece 23 includes a first connecting portion 231, a second connecting portion 232, and a first extension portion 233. The first connecting portion 231 and the second connecting portion 232 extend along the second direction Y. In the first battery pack 1a, one end of the first connecting portion 231 is connected to the second terminal b of the second battery 11b, and one end of the second connecting portion 232 is connected to the first terminal a of the third battery 11c. Along the second direction Y, the first extension portion 233 is disposed between the first connecting portion 231 and the second connecting portion 232. The first extension portion 233 extends along the first direction X. The other end of the first connecting portion 231 and the other end of the second connecting portion 232 are respectively connected to the first extension portion 233.

[0032] In some embodiments, the plurality of connecting pieces 2 include a second diagonal connecting piece 24. The second diagonal connecting piece 24 includes a third connecting portion 241, a fourth connecting portion 242, and a second extension portion 243. The third connecting portion 241 and the fourth connecting portion 242 extend along the second direction Y. In the second battery pack 1b, one end of the third connecting portion 241 is connected to the first terminal a of the second battery 11b, and one end of the fourth connecting portion 242 is connected to the second terminal b of the third battery 11c. Along the second direction Y, the second extension portion 243 is disposed between the third connecting portion 241 and the fourth connecting portion 242. The second extension portion 243 extends along the first direction X. The other ends of the third connecting portion 241 and the fourth connecting portion 242 are respectively connected to the second extension portion 243.

[0033] In some embodiments, the first diagonal connecting piece 23 and the second diagonal connecting piece 24 are arranged in a mirror-symmetric manner along the first direction X. The mirror-symmetric arrangement of the first diagonal connecting piece 23 and the second diagonal connecting piece 24 along the first direction X allows the first diagonal connecting piece 23 and the second diagonal connecting piece 24 to be formed by casting using the same mold and then machining, which helps to reduce manufacturing costs.

[0034] In some embodiments, the plurality of connecting pieces 2 include a third diagonal connecting piece 25, which has the same structure as the first diagonal connecting piece 23. In the third battery pack 1c, the second terminal b of the second battery 11b is connected to the first terminal a of the third battery 11c through the third diagonal connecting piece 25.

[0035] Figure 6 The diagram shows the arrangement and connection of three batteries 11 in the first battery pack 1a, the second battery pack 1b, and the third battery pack 1c of the battery assembly 100, forming a total of one pair of battery packs 10. Figure 5 The diagram shows the arrangement and connection of five batteries 11 each in the first battery pack 1a, second battery pack 1b, and third battery pack 1c of the battery assembly 100, with a total of two pairs of battery packs 10. Figure 7The diagram shows the arrangement and connection of seven batteries 11 in the first battery pack 1a, second battery pack 1b, and third battery pack 1c of the battery assembly 100, forming a total of one pair of battery packs 10. The sixth battery 11 and the seventh battery 11 in the first battery pack 1a, second battery pack 1b, and third battery pack 1c are respectively the sixth battery 11f and the seventh battery 11g. Figure 8 The diagram illustrates the arrangement and connection of five batteries 11 in the first battery pack 1a, second battery pack 1b, and third battery pack 1c of the battery assembly 100, forming three pairs of battery packs 10. In some embodiments, along the first direction X, in two adjacent first batteries 11a, the second terminal b of one first battery 11a is electrically connected to the first terminal a of the adjacent first battery 11a. In the battery pack pair 10, the first terminal a of the second battery 11b of the first battery pack 1a and the second terminal b of the second battery 11b of the second battery pack 1b are electrically connected. In the third battery pack 1c, the second terminal b of the first battery 11a and the first terminal a of the second battery 11b are electrically connected, and along the second direction Y, the batteries 11 in the third battery pack 1c are connected in series.

[0036] Please see Figure 6 In some embodiments, the number of batteries 11 in the first battery pack 1a, the second battery pack 1b and the third battery pack 1c is three. In the second battery pack 1b adjacent to the third battery pack 1c, the first terminal a of the third battery 11c and the second terminal b of the third battery 11c are electrically connected.

[0037] Please see Figure 5 , Figure 7 and Figure 8 In some embodiments, the first battery pack 1a, the second battery pack 1b and the third battery pack 1c each include a fourth battery 11d and a fifth battery 11e. The fourth battery 11d and the fifth battery 11e are respectively the fourth battery 11 arranged in the fourth position and the fifth battery 11 arranged in the fifth position along the second direction Y. Along the second direction Y, starting from the fourth battery 11d, the arrangement order between the first terminal a and the second terminal b of two adjacent batteries 11 is reversed.

[0038] In some embodiments, the number of batteries 11 in the first battery pack 1a, the second battery pack 1b, and the third battery pack 1c is at least five. Except for the third battery pack 1c, starting from the fourth battery 11d, batteries 11 with the same number of positions in the second direction Y are connected in series along the first direction X to form a column. Furthermore, adjacent columns of batteries 11 along the second direction Y are connected in series. Specifically, taking a battery pack pair 10 as an example, and the number of batteries 11 in the first battery pack 1a, the second battery pack 1b, and the third battery pack 1c being five, except for the third battery pack 1c... Starting from the fourth battery 11d, along the second direction Y, all fourth batteries 11d form one column, and all fifth batteries 11e form another column. The second terminal b of the fourth battery 11d in the first battery pack 1a and the first terminal a of the fourth battery 11d in the second battery pack 1b are electrically connected. The first terminal a of the fifth battery 11e in the first battery pack 1a and the second terminal b of the fifth battery 11e in the second battery pack 1b are electrically connected. The first terminal a of the fourth battery 11d in the first battery pack 1a and the second terminal b of the fifth battery 11e in the first battery pack 1a are electrically connected. In the second battery pack 1b adjacent to the third battery pack 1c, the first terminal a of the third battery 11c and the second terminal b of the fourth battery 11d are electrically connected. In the third battery pack 1c, the second terminal b of the third battery 11c and the first terminal a of the fourth battery 11d are electrically connected.

[0039] In some embodiments, the number of battery pack pairs 10 is at least two pairs, and between two adjacent battery pack pairs 10, the first terminal a of the third battery 11c of the second battery pack 1b of one battery pack pair 10 is electrically connected to the second terminal b of the third battery 11c of the first battery pack 1a of the adjacent battery pack pair 10.

[0040] Please see Figure 3 and Figure 4 In some embodiments, the battery assembly 100 includes an insulating plate 3 and a plurality of connecting pieces 2. The insulating plate 3 covers the top end 111 of each battery 11. The side of the insulating plate 3 facing away from the battery 11 has a plurality of receiving grooves 31. The batteries 11 are connected in series one by one through the plurality of connecting pieces 2. One connecting piece 2 is disposed in one receiving groove 31. The side wall of the receiving groove 31 that receives the connection between the connecting piece 2 and the battery 11 has a clearance notch 311, which communicates with the receiving groove 31. The receiving groove 31 serves to position the connecting piece 2. By providing the clearance notch 311, one end of a pry bar can be inserted into the clearance notch 311 to facilitate the inspection personnel to check whether the connection between the connecting piece 2 and the terminal post is well welded after welding.

[0041] In some implementations, a first pole a and a second pole b pass through the insulating plate 3 and are respectively located at both ends of a receiving groove 31. The receiving groove 31 has a clearance notch 311 at the end where the first pole a is located, and another clearance notch 311 at the end where the second pole b is located.

[0042] Please see Figure 3 and Figures 9-11 In some embodiments, the battery assembly 100 includes a plurality of first limiting plates 4 and a plurality of second limiting plates 5, with each first limiting plate 4 and each second limiting plate 5 corresponding to and opposite to the other. The first limiting plates 4 and the second limiting plates 5 are used to fix the battery pack 1000 to the outer casing 200. Along the second direction Y, a first limiting plate 4 and a second limiting plate 5 jointly clamp a first battery pack 1a; and / or along the second direction Y, a first limiting plate 4 and a second limiting plate 5 jointly clamp a second battery pack 1b; and / or along the second direction Y, a first limiting plate 4 and a second limiting plate 5 jointly clamp a third battery pack 1c.

[0043] In some embodiments, along the third direction Z, a ninth bend 41 is provided at one end of the first limiting plate 4 away from the top end 111 of the battery 11. The ninth bend 41 is formed by bending the edge of one end of the first limiting plate 4 away from the top end 111 of the battery 11 along the direction of the second limiting plate 5 toward the first limiting plate 4. The ninth bend 41 is used to be screwed and fixed to the outer shell 200 of the battery pack 1000 by threaded fasteners.

[0044] In some embodiments, along the third direction Z, a tenth bend 51 is provided at one end of the second limiting plate 5 away from the top end 111 of the battery 11. The tenth bend 51 is formed by bending the edge of one end of the second limiting plate 5 away from the top end 111 of the battery 11 along the direction of the first limiting plate 4 toward the second limiting plate 5. The tenth bend 51 is used to be screwed and fixed to the outer shell 200 of the battery pack 1000 by threaded fasteners.

[0045] In some embodiments, along the third direction Z, the first limiting plate 4 has a first insertion portion (not shown) at one end away from the top end 111 of the battery 11. The first insertion portion is used to insert into the outer casing 200 of the battery pack 1000 to position the first limiting plate 4. In some embodiments, the first insertion portion is located at the ninth bend 41.

[0046] In some embodiments, along the third direction Z, the second limiting plate 5 has a second insertion portion (not shown) at one end away from the top end 111 of the battery 11. The second insertion portion is used to insert into the outer casing 200 of the battery pack 1000 to position the second limiting plate 5. In some embodiments, the second insertion portion is located at the tenth bend 51.

[0047] In some embodiments, along the first direction, the first limiting plate 4 and the second limiting plate 5 have the same length, and the first insertion portion is located at the midpoint of the first limiting plate 4. Along the second direction Y, the first limiting plate 4 and the second limiting plate 5 are aligned, while the first insertion portion and the second insertion portion are offset, meaning that in the second direction Y, the first insertion portion is not aligned with the second insertion portion. Having the first limiting plate 4 and the second limiting plate 5 of the same length helps save processing costs. Positioning the first insertion portion at the midpoint of the first limiting plate 4 along the first direction X, and offsetting the first and second insertion portions along the second direction Y, can prevent mistaken installation, reducing the likelihood of accidentally installing the first limiting plate 4 into the mounting position of the second mounting plate 5, or vice versa.

[0048] In some embodiments, along the third direction Z, the first limiting plate 4 is provided with a first bending portion 42 and a second bending portion 43 at one end near the top end 111 of the battery 11. The first bending portion 42 is formed by bending the edge of the first limiting plate 4 near the top end 111 of the battery 11 toward the second limiting plate 5 and extending it toward the first limiting plate 4. The second bending portion 43 is formed by bending the edge of the first bending portion 42 away from the first limiting plate 4 toward the third direction Z and extending it.

[0049] In some embodiments, the first bending portion 42 is provided with a first lifting hole 421, which is used to install lifting fixtures for lifting equipment.

[0050] In some embodiments, the second bending portion 43 is provided with a first positioning hole 431, which is used to position the first limiting plate 4 on the tooling of the stacking machine when processing the first limiting plate 4.

[0051] In some embodiments, along the third direction Z, the second limiting plate 5 is provided with a third bending portion 52 and a fourth bending portion 53 at one end near the top end 111 of the battery 11. The third bending portion 52 is formed by bending the edge of the second limiting plate 5 near the top end 111 of the battery 11 towards the first limiting plate 4 and extending it to the second limiting plate 5. The fourth bending portion 53 is formed by bending the edge of the third bending portion 52 away from the second limiting plate 5 towards the third direction Z and extending it to the third direction Z.

[0052] In some embodiments, the third bend 52 is provided with a second lifting hole 521, which is used to install lifting fixtures for lifting equipment.

[0053] In some embodiments, the fourth bending portion 53 is provided with a second positioning hole 531, which is used to position the second limiting plate 5 on the tooling of the stacking machine when processing the second limiting plate 5.

[0054] In some embodiments, along the first direction X, the length of the second bend 43 is greater than the length of the fourth bend 53. By setting the second bend 43 and the fourth bend 53 to have different lengths, during processing, the second bend 43 and the fourth bend 53 can respectively cooperate with different tooling on the stacking machine to play a foolproof role, which helps to reduce the problem of the first limiting plate 4 and the second limiting plate 5 being used interchangeably, which could lead to the problem of reverse installation when installed on the base plate 201.

[0055] In some embodiments, the battery assembly 100 includes a plurality of straps 6, at least one strap 6 being wrapped around a first limiting plate 4 and a second limiting plate 5 disposed opposite to each other.

[0056] In some embodiments, along the first direction X, the first limiting plate 4 includes a first end 4a and a second end 4b disposed opposite to each other. The first end 4a is provided with a fifth bend 44, and the second end 4b is provided with a sixth bend 45. The fifth bend 44 is obtained by extending from the edge of the first end 4a and folding it in the direction from the first end 4a to the second end 4b. The sixth bend 45 is obtained by extending from the edge of the second end 4b and folding it in the direction from the second end 4b to the first end 4a. The fifth bend 44 and the sixth bend 45 are used to limit the strapping 6 in a direction parallel to the third direction Z.

[0057] In some embodiments, along the first direction X, the second limiting plate 5 includes a third end 5a and a fourth end 5b disposed opposite to each other. The third end 5a is provided with a seventh bend 54, and the fourth end 5b is provided with an eighth bend 55. The seventh bend 54 is obtained by extending from the edge of the third end 5a and folding it in the direction from the third end 5a to the fourth end 5b. The eighth bend 55 is obtained by extending from the edge of the fourth end 5b and folding it in the direction from the fourth end 5b to the third end 5a. The seventh bend 54 and the eighth bend 55 are used to limit the strapping 6 in a direction parallel to the third direction Z.

[0058] In some embodiments, a first battery pack 1a, a second battery pack 1b, and a third battery pack 1c are all secured by two binding straps 6, spaced apart along the third direction Z. The number of fifth bends 44 and sixth bends 45 are both two and correspond one-to-one. Along the third direction Z, one fifth bend 44, another fifth bend 44, and a ninth bend 41 are arranged sequentially; one sixth bend 45, another sixth bend 45, and a ninth bend 41 are arranged sequentially; the number of seventh bends 54 and eighth bends 55 are both two and correspond one-to-one; one seventh bend 54, another seventh bend 54, and a tenth bend 51 are arranged sequentially; and an eighth bend 55... 55. Another eighth bend 55 and a tenth bend 51 are arranged in sequence. A strapping 6 is provided between two fifth bends 44, two sixth bends 45, two seventh bends 54 and two eighth bends 55. Another strapping 6 is provided between the ninth bend 41 and the adjacent fifth bend 44, the ninth bend 41 and the adjacent sixth bend 45, the tenth bend 51 and the adjacent seventh bend 54, and the tenth bend 51 and the adjacent eighth bend 55.

[0059] In some embodiments, the first bend 42, the second bend 43, the third bend 52, the fourth bend 53, the fifth bend 44, the sixth bend 45, the seventh bend 54, the eighth bend 55, the ninth bend 41, and the tenth bend 51 are made by a folding process.

[0060] Please see Figure 3 , Figure 5 and Figures 9-12 Based on the same inventive concept, this application also provides a battery pack 1000, including a housing 200 and a battery assembly 100 in any of the above embodiments. The housing 200 is provided with a receiving cavity 200a. The housing 200 includes a bottom plate 201. The battery assembly 100 is disposed in the receiving cavity 200a. The bottom plate 201 supports the battery assembly 100.

[0061] In some embodiments, along the third direction Z, the ninth bend 41 and the tenth bend 51 are screwed and fixed to the base plate 201.

[0062] In some embodiments, the base plate 201 is provided with a first insertion hole (not shown in the figure), and the first insertion part is a pin. The first insertion part is inserted into the first insertion hole to serve to position the first limiting plate 4.

[0063] In some embodiments, the base plate 201 is provided with a second insertion hole (not shown in the figure), and the second insertion part is a pin. The second insertion part is inserted into the second insertion hole to serve to position the second limiting plate 5.

[0064] In some embodiments, the housing 200 includes a front panel 202 and a rear panel 203 disposed opposite each other along a first direction X, and the battery assembly 100 is disposed between the front panel 202 and the rear panel 203. The battery pack 1000 includes a control board 300 and a terminal block 400. The control board 300 and the terminal block 400 are disposed on the front panel 202. The control board 300 is electrically connected to the negative terminal of the battery assembly 100 and the terminal block 400. The positive terminal of the battery assembly 100 is electrically connected to the terminal block 400. The terminal block 400 is used for electrical connection with other devices.

[0065] In some embodiments, the wiring terminal 400 passes through the front end plate 202, and the control board 300 is disposed on the surface of the front end plate 202 facing the battery assembly 100.

[0066] In one embodiment, the battery pack 1000 includes a first adapter 500 and a second adapter 600. The positive terminal is connected to the terminal block 400 via the first adapter 500, and the negative terminal is electrically connected to the control board 300 via the second adapter 600. The first adapter 500 and the second adapter 600 can be metal busbars.

[0067] In some embodiments, the battery pack 1000 includes a power supply wire 700, and a first adapter 500 is connected to a control board 300 via the power supply wire 700. The power supply wire 700 is used to supply power to the control board 300 from the battery pack 100.

[0068] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A battery assembly, characterized in that, include: A third battery pack and at least one pair of battery packs are arranged sequentially along a first direction. The at least one pair of battery packs and the third battery pack are arranged sequentially along the first direction. The battery pack pair includes a first battery pack and a second battery pack arranged sequentially along the first direction. The first battery pack, the second battery pack, and the third battery pack each include an odd number of at least three batteries arranged sequentially along a second direction. Along the second direction, the first battery, the second battery, and the third battery are respectively the first battery, the second battery, and the third battery. When viewed along the third direction, the top of each battery is provided with a first terminal post and a second terminal post with opposite polarities arranged opposite to each other along the first direction. The arrangement order between the first terminal post and the second terminal post of the first battery is the opposite of that of the second battery and the third battery. The batteries are connected in series one by one. In the first battery pack, the first terminal of the first battery and the second terminal of the third battery serve as the two output electrodes of the battery assembly. The first terminal of the third battery is electrically connected to the second terminal of the second battery. In the second battery pack, the first terminal of the second battery and the second terminal of the third battery are electrically connected. In the third battery pack, the second terminal of the second battery and the first terminal of the third battery are electrically connected. Wherein, the first direction, the second direction, and the third direction are mutually perpendicular to each other.

2. The battery assembly according to claim 1, characterized in that, The first battery pack, the second battery pack, and the third battery pack each include a fourth battery and a fifth battery. The fourth battery and the fifth battery are respectively the battery arranged in the fourth position and the battery arranged in the fifth position along the second direction. Along the second direction, starting from the fourth battery, the arrangement order of the first and second terminals of two adjacent batteries is reversed.

3. The battery assembly according to claim 1, characterized in that, The first battery pack includes a first diagonal connecting piece, which includes a first connecting portion, a second connecting portion, and a first extension portion. The first connecting portion and the second connecting portion extend along a second direction. In the first battery pack, one end of the first connecting portion is connected to the second terminal of the second battery, and one end of the second connecting portion is connected to the first terminal of the third battery. Along the second direction, the first extension portion is disposed between the first connecting portion and the second connecting portion. The first extension portion extends along the first direction, and the other end of the first connecting portion and the other end of the second connecting portion are respectively connected to the first extension portion.

4. The battery assembly according to claim 3, characterized in that, The second battery pack includes a second diagonal connecting piece, which includes a third connecting portion, a fourth connecting portion, and a second extension portion. The third connecting portion and the fourth connecting portion extend along the second direction. In the second battery pack, one end of the third connecting portion is connected to the first terminal of the second battery, and one end of the fourth connecting portion is connected to the second terminal of the third battery. Along the second direction, the second extension portion is disposed between the third connecting portion and the fourth connecting portion. The second extension portion extends along the first direction, and the other ends of the third connecting portion and the fourth connecting portion are respectively connected to the second extension portion.

5. The battery assembly according to claim 4, characterized in that, Along the first direction, the first diagonal connecting piece and the second diagonal connecting piece are arranged in a mirror-symmetric manner.

6. The battery assembly according to claim 1, characterized in that, The device includes an insulating plate and multiple connecting pieces. The insulating plate covers the top of each battery. The side of the insulating plate facing away from the battery has multiple receiving slots. The batteries are connected in series one by one through the multiple connecting pieces. Each connecting piece is located in one receiving slot. The side wall of the receiving slot that receives the connection between the connecting piece and the battery has a clearance notch. The clearance notch communicates with the receiving slot.

7. The battery assembly according to claim 1, characterized in that, The battery assembly includes a plurality of first limiting plates and a plurality of second limiting plates, with each first limiting plate and each second limiting plate corresponding to and opposite to the other, and the first limiting plates and the second limiting plates being used to fix the battery pack shell. Along the second direction, a first limiting plate and a second limiting plate together clamp a first battery pack; and / or Along the second direction, a first limiting plate and a second limiting plate together clamp a second battery pack; and / or Along the second direction, a first limiting plate and a second limiting plate together clamp the third battery pack.

8. The battery assembly according to claim 7, characterized in that, Along the third direction, the first limiting plate has a first insertion portion at its end away from the top end of the battery, the first insertion portion being used to insert into the outer shell of the battery pack. The second limiting plate has a second insertion portion at its end away from the top end of the battery, the second insertion portion being used to insert into the outer shell of the battery pack. Along the first direction, the first limiting plate and the second limiting plate have the same length, and the first insertion portion is located at the midpoint of the first limiting plate. Along the second direction, the first limiting plate and the second limiting plate are aligned, and the first insertion portion and the second insertion portion are offset; and / or Along the third direction, the first limiting plate has a first bent portion and a second bent portion at one end near the top of the battery. The first bent portion is formed by bending the edge of the first limiting plate near the top of the battery toward the second limiting plate and extending thereto. The second bent portion is formed by bending the edge of the first bent portion away from the first limiting plate toward the third direction. The second limiting plate has a third bent portion and a fourth bent portion at one end near the top of the battery. The third bent portion is formed by bending the edge of the second limiting plate near the top of the battery toward the first limiting plate and extending thereto. The fourth bent portion is formed by bending the edge of the third bent portion away from the second limiting plate and extending thereto. Along the first direction, the length of the second bent portion is greater than the length of the fourth bent portion.

9. The battery assembly according to claim 7, characterized in that, The battery assembly includes multiple straps, and at least one of the straps is wrapped around a first limiting plate and a second limiting plate that are disposed opposite to each other; Along the first direction, the first limiting plate includes a first end and a second end disposed opposite to each other. The first end has a fifth bend, and the second end has a sixth bend. The fifth bend extends from the edge of the first end and is folded along the direction from the first end to the second end. The sixth bend extends from the edge of the second end and is folded along the direction from the second end to the first end. The fifth and sixth bends are used to limit the binding strap in a direction parallel to the third direction; and / or Along the first direction, the second limiting plate includes a third end and a fourth end disposed opposite to each other. The third end has a seventh bend, and the fourth end has an eighth bend. The seventh bend is formed by extending from the edge of the third end and folding it in the direction from the third end to the fourth end. The eighth bend is formed by folding from the edge of the fourth end in the direction from the fourth end to the third end. The seventh bend and the eighth bend are used to limit the strapping in a direction parallel to the third direction.

10. A battery pack, characterized in that, include: The outer casing has a receiving cavity, and the outer casing includes a base plate; The battery assembly as described in any one of claims 1-9, wherein the battery assembly is disposed within the receiving cavity, and the base plate supports the battery assembly.

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