Battery pack

Abstract

A battery pack. The battery pack comprises a bottom plate, an upper cover, a BMS board, a first battery cell, a second battery cell, a first busbar, a second busbar, and third busbars. The upper cover is detachably connected to the bottom plate. An accommodating cavity is formed between the upper cover and the bottom plate. The first battery cell and the second battery cell are accommodated in the accommodating cavity. The BMS board is arranged on the upper cover. The BMS board is provided with a positive terminal and a negative terminal. The positive terminal is electrically connected to the second busbar. The negative terminal is electrically connected to the first busbar. The first busbar is electrically connected to the negative electrode of the first battery cell. The second busbar is electrically connected to the positive electrode of the second battery cell. The positive electrode of the first battery cell and the negative electrode of the second battery cell are electrically connected by means of the third busbars.

Description

A battery pack

[0001] Cross-reference of related applications

[0002] This application claims priority to Chinese Patent Application No. 202510072779.6, filed on January 17, 2025, entitled “A Battery Pack”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of energy storage technology, and more particularly to a battery pack. Background Technology

[0004] A battery pack is a device that converts external energy into electrical energy and stores it, enabling it to power external electrical devices (such as portable energy storage devices) when needed. It is widely used in daily life, greatly enhancing convenience and enriching people's lives. A traditional battery pack consists of a BMS (Battery Management System) board and battery cells. The battery cells are electrically connected to the BMS board, which controls the charging and discharging of the cells.

[0005] With the continuous development of the energy storage industry, the demand for battery pack capacity within a certain space is constantly increasing.

[0006] Application content

[0007] In view of the above problems, embodiments of this application provide a battery pack that overcomes or at least partially solves the above problems.

[0008] According to one aspect of the embodiments of this application, a battery pack is provided, including a base plate, a top cover, a first battery cell, a second battery cell, a first current bus, a second current bus, and a third current bus; the top cover is detachably electrically connected to the base plate; a receiving cavity is formed between the top cover and the base plate, and the first battery cell and the second battery cell are received in the receiving cavity; a BMS board is disposed on the top cover; a positive terminal and a negative terminal are disposed on the BMS board, the positive terminal is electrically connected to the second current bus, and the negative terminal is electrically connected to the first current bus; the first current bus is electrically connected to the negative terminal of the first battery cell, the second current bus is electrically connected to the positive terminal of the second battery cell, and the positive terminal of the first battery cell and the negative terminal of the second battery cell are electrically connected through the third current bus.

[0009] In one alternative embodiment, the battery pack further includes at least one third cell, and the number of third current buses is at least two; the positive terminal of the first cell, at least one of the third cells, and the negative terminal of the second cell are connected in series through the third current buses.

[0010] In one optional embodiment, the top cover includes a first folding plate, a first side plate, a top plate, a second side plate, and a second folding plate connected sequentially; the first side plate and the second side plate are disposed opposite to each other, and the receiving cavity is formed between the first side plate, the top plate, the second side plate, and the bottom plate; the first folding plate is connected to the side of the first side plate away from the top plate, and the first folding plate is bent relative to the first side plate; the second folding plate is connected to the side of the second side plate away from the top plate, and the second folding plate is bent relative to the second side plate; the first folding plate is detachably connected to the bottom plate, and the second folding plate is detachably connected to the bottom plate.

[0011] In one alternative embodiment, the battery pack further includes a plurality of first rivet screws distributed on the base plate; the top cover is provided with a plurality of first through holes distributed on the first folding plate and the second folding plate; the number of first rivet screws is the same as the number of first through holes, with one first rivet screw corresponding to one first through hole.

[0012] In one alternative embodiment, the BMS board is disposed on the first side panel.

[0013] In one alternative embodiment, the BMS board is further connected to a fourth current bus and a fifth current bus; the fourth current bus is electrically connected to the positive terminal, and the fifth current bus is electrically connected to the negative terminal; a male terminal and a female terminal are electrically connected to the two ends of the fourth current bus, respectively; the two ends of the fifth current bus are electrically connected to the male terminal and the female terminal, respectively; when two adjacent battery packs are bundled together, the male terminal of one battery pack is used to dock with the female terminal of the other battery pack.

[0014] In one alternative embodiment, the BMS board is further provided with a positive terminal and a negative terminal, the positive terminal being electrically connected to the fourth busbar and the negative terminal being electrically connected to the fifth busbar.

[0015] In one alternative embodiment, the battery pack further includes a housing having a first side, an upper plate, a second side, and a lower plate connected in sequence. The lower plate is connected to the first side, and the upper and lower plates are disposed opposite to each other. A female terminal is disposed on the upper plate. The lower plate is recessed in a direction away from the upper plate to form a mounting groove, and the male terminal is located in the mounting groove. A mounting hole is provided at the bottom of the mounting groove.

[0016] In one alternative embodiment, the battery pack further includes a protective door that covers the mounting hole and is rotatably connected to the lower plate. When two adjacent battery packs are packed together, the female terminal of one battery pack pushes open the protective door and connects with the male terminal of the other battery pack.

[0017] In one alternative embodiment, the upper plate is recessed towards the lower plate to form a positioning groove, and the female terminal is disposed at the bottom of the positioning groove; when two adjacent battery packs are packaged together, the mounting groove of one battery pack is inserted into the positioning groove of the other battery pack.

[0018] In one alternative embodiment, the male terminal includes a first current-passing plate, and the female terminal includes two opposing second current-passing plates, wherein when two adjacent battery packs are bundled together, the first current-passing plate of one battery pack is inserted between the two second current-passing plates of the other battery pack.

[0019] In one alternative embodiment, the battery pack further includes a handle rotatably connected to the housing, with a first connecting portion provided at the end of the handle away from the housing; the housing is provided with a second connecting portion, wherein when two adjacent battery packs are packed together, the first connecting portion of one battery pack is used to connect with the second connecting portion of the other battery pack.

[0020] The beneficial effects of this application embodiment include: providing a battery pack including a base plate, a top cover, a first battery cell, a second battery cell, a first current bus, a second current bus, and a third current bus; the top cover is detachably electrically connected to the base plate; a receiving cavity is formed between the top cover and the base plate, and the first battery cell and the second battery cell are housed in the receiving cavity; a BMS board is disposed on the top cover; a positive terminal and a negative terminal are disposed on the BMS board, the positive terminal is electrically connected to the second current bus, and the negative terminal is electrically connected to the first current bus; the first current bus is electrically connected to the negative terminal of the first battery cell, the second current bus is electrically connected to the positive terminal of the second battery cell, and the positive terminal of the first battery cell and the negative terminal of the second battery cell are electrically connected through the third current bus. The battery pack includes a first battery cell and a second battery cell, and compared to the prior art where the battery pack includes only one battery cell, this application increases the volumetric energy density of the battery pack.

[0021] In addition, the first and second battery cells are located between the receiving cavity formed by the base plate and the top cover, which not only protects the first and second battery cells, but also allows the first and second battery cells to be grouped together through the base plate and the top cover, which facilitates transportation and subsequent packing of multiple battery packs.

[0022] In addition, the first and second cells can be grouped together using the base plate and top cover, which simplifies the installation process and saves costs.

[0023] In addition, the first and second battery cells are electrically connected through a third current bus, which can reduce internal impedance and is suitable for low-voltage, high-current applications. Attached Figure Description

[0024] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

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

[0026] Figure 2 is a partial exploded view of one implementation of the battery pack provided in an embodiment of this application;

[0027] Figure 3 is a schematic diagram of another implementation of the battery pack provided in the embodiments of this application;

[0028] Figure 4 is a schematic diagram of the connection between the male and female terminals of the present application and the fourth and fifth current busbars according to an embodiment of the present application;

[0029] Figure 5 is a schematic diagram of the male terminal provided in an embodiment of this application;

[0030] Figure 6 is a schematic diagram of another implementation of the battery pack provided in the embodiments of this application;

[0031] Figure 7 is a cross-sectional view along P in Figure 6 provided in an embodiment of this application;

[0032] Figure 8 is a cross-sectional view of one implementation of two battery packs in parallel according to an embodiment of this application;

[0033] Figure 9 is an enlarged schematic diagram of part A in Figure 8 provided in an embodiment of this application;

[0034] Figure 10 is a cross-sectional view of another implementation of the two battery packs provided in the embodiments of this application. Embodiments of the present invention

[0035] 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 "electrically connected" to another element, it can be directly electrically 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.

[0036] 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.

[0037] Please refer to Figures 1, 2, and 3 together. This application embodiment provides a battery pack 100, which includes a base plate 1, a top cover 2, a first battery cell 3a, a second battery cell 3b, a first current bus 4a, a second current bus 4b, a third current bus 4c, and a BMS (Battery Management System). The battery management system (BMS) board 6 includes a top cover 2 detachably connected to the bottom plate 1; a receiving cavity 2s is formed between the top cover 2 and the bottom plate 1, and the first battery cell 3a and the second battery cell 3b are housed in the receiving cavity 2s; the BMS board 6 is disposed on the top cover 2, and a positive terminal 7a and a negative terminal 7b are disposed on the BMS board 6; the positive terminal 7a is electrically connected to the second overcurrent bus 4b, and the negative terminal 7b is electrically connected to the first overcurrent bus 4a; the first overcurrent bus 4a is electrically connected to the negative terminal 3a2 of the first battery cell 3a, and the second overcurrent bus 4b is electrically connected to the positive terminal 3b1 of the second battery cell 3b; the positive terminal 3a1 of the first battery cell 3a and the negative terminal 3b2 of the second battery cell 3b are electrically connected through the third overcurrent bus 4c. The battery pack 100 includes a first battery cell 3a and a second battery cell 3b. Compared with the case of a battery pack in the prior art that includes only one battery cell, this application increases the volumetric energy density of the battery pack 100.

[0038] In addition, the first battery cell 3a and the second battery cell 3b are disposed between the receiving cavity 2s formed by the base plate 1 and the top cover 2, which not only protects the first battery cell 3a and the second battery cell 3b, but also makes the first battery cell 3a and the second battery cell 3b grouped together through the base plate 1 and the top cover 2, which is convenient for transportation and for subsequent packing of multiple battery packs 100.

[0039] In addition, the first battery cell 3a and the second battery cell 3b can be grouped together using the base plate 1 and the top cover 2, which simplifies the installation process and saves costs.

[0040] In addition, the first cell 3a and the second cell 3b are electrically connected through the third current bus 4c, which can reduce internal impedance and is suitable for low-voltage, high-current applications.

[0041] In addition, the BMS board 6, positive terminal 7a and negative terminal 7b facilitate the monitoring of the first cell 3a and the second cell 3b, and facilitate the subsequent merging of two adjacent battery packs 100.

[0042] It is worth noting that in some embodiments, the battery pack 100 further includes at least one third cell 3c, and the number of third current channels 4c is at least two; the positive electrode 3a1 of the first cell 3a, at least one of the third cells 3c and the negative electrode 3b2 of the second cell 3b are connected in series through the third current channels 4c.

[0043] It is understood that the number of third current-passing buses 4c is one more than the number of third battery cells 3c. For example, if there are two third battery cells 3c, then there are three third current-passing buses 4c. The specific way in which the positive electrode 3a1 of the first battery cell 3a, at least one of the third battery cells 3c, and the negative electrode 3b2 of the second battery cell 3b are connected in series through the third current-passing buses 4c is as follows: the positive electrode 3a1 of the first battery cell 3a is connected to the negative electrode 3c2 of one of the third battery cells 3c through one third current-passing bus 4c; the positive electrode 3c1 of one of the third battery cells 3c is connected to the negative electrode 3c2 of another of the third battery cells 3c through another third current-passing bus 4c; and the positive electrode 3c1 of the other third battery cell 3c is connected to the negative electrode 3b2 of the second battery cell 3b through yet another third current-passing bus 4c.

[0044] It is worth noting that in some embodiments, the first battery cell 3a, the second battery cell 3b, and the third battery cell 3c are stacked in a regular manner.

[0045] It is worth noting that in some embodiments, the first current bus 4a is electrically connected to the negative electrode 3a2 of the first battery cell 3a by laser welding.

[0046] It is worth noting that in some embodiments, the second current bus 4b is electrically connected to the positive electrode 3b1 of the second cell 3b by laser welding.

[0047] It is worth noting that in some embodiments, the positive electrode 3a1 of the first cell 3a, at least one of the third cells 3c and the negative electrode 3b2 of the second cell 3b are connected in series by laser welding through the third busbar 4c.

[0048] It is worth noting that, in some embodiments, the upper cover 2 includes a first folding plate 21, a first side plate 22, an upper plate 23, a second side plate 24, and a second folding plate 25 connected in sequence; the first side plate 22 and the second side plate 24 are arranged opposite to each other, and the receiving cavity 2s is formed between the first side plate 22, the upper plate 23, the second side plate 24, and the bottom plate 1; the first folding plate 21 is connected to the side of the first side plate 22 away from the upper plate 23, and the first folding plate 21 is bent relative to the first side plate 22; the second folding plate 25 is connected to the side of the second side plate 24 away from the upper plate 23, and the second folding plate 25 is bent relative to the second side plate 24; the first folding plate 21 and the second folding plate 25 are detachably connected to the bottom plate 1. Through the upper cover 2 and the bottom plate 1, the first battery cell 3a and the second battery cell 3b can be grouped together, which is convenient for transportation and for subsequent packaging of multiple battery packs 100.

[0049] It is understood that the first folding plate 21 is preferably connected to the side of the first side plate 22 facing away from the receiving cavity 2s, and the second folding plate 25 is preferably connected to the side of the second side plate 24 facing away from the receiving cavity 2s, thereby facilitating the detachable assembly of the upper cover 2 and the bottom plate 1.

[0050] It is worth noting that in some embodiments, the battery pack 100 further includes a plurality of first rivet screws 5a, which are distributed on the base plate 1; the upper cover 2 is provided with a plurality of first through holes 2h, which are distributed on the first folding plate 21 and the second folding plate 25; the number of first rivet screws 5a is the same as the number of first through holes 2h, with one first rivet screw 5a corresponding to one first through hole 2h. One first rivet screw 5a is used to be inserted into one first through hole 2h. Through the arrangement of the first rivet screws 5a and the first through holes 2h, and in conjunction with nuts, a detachable connection between the upper cover 2 and the base plate 1 can be achieved.

[0051] It is worth noting that in some embodiments, bolts or studs may be used instead of the first press-fit screw 5a.

[0052] It is worth noting that in some embodiments, when the upper cover 2 includes the first folding plate 21, the first side plate 22, the upper plate 23, the second side plate 24, and the second folding plate 25 connected in sequence, the BMS board 6 is specifically disposed on the first side plate 22. Since the BMS board 6 is provided with a positive terminal 7a and a negative terminal 7b, with the positive terminal 7a electrically connected to the second current bus 4b and the negative terminal 7b electrically connected to the first current bus 4a, the first current bus 4a can be disposed close to the first side plate 22, thereby shortening the distance between the first current bus 4a and the negative terminal 7a, facilitating the electrical connection of the first battery cell 3a to the BMS board 6 through the first current bus 4a; similarly, the second current bus 4b can be disposed close to the first side plate 22, thereby shortening the distance between the second current bus 4b and the positive terminal 7a, facilitating the connection of the second battery cell 3b to the BMS board 6 through the second current bus 4b.

[0053] In some embodiments, the first side plate 22 is provided with a plurality of second rivet screws 5b, which are distributed on the first side plate 22. The BMS plate 6 is provided with a plurality of second through holes (not shown), which are distributed on the BMS plate 6. One second rivet screw 5b corresponds to one second through hole, and one second rivet screw 5b is used to be inserted into one second through hole. Through the provision of the second rivet screws 5b and the second through holes, and in conjunction with nuts, the upper cover 2 and the BMS plate 6 can be detachably connected.

[0054] It is worth noting that in some embodiments, a bolt or stud may be used instead of the second press-fit screw 5b.

[0055] In some embodiments, the number of positive terminals 7a is at least two and the number of negative terminals 7b is at least two, which can shunt large currents, reduce the current surge on a single terminal, and avoid damage.

[0056] It is worth noting that in some embodiments, the BMS board 6 is also connected to a fourth current bus 4d and a fifth current bus 4e; the fourth current bus 4d is electrically connected to the positive terminal 7a, and the fifth current bus 4e is electrically connected to the negative terminal 7b; the two ends of the fourth current bus 4d are respectively electrically connected to a male terminal 8a and a female terminal 8b; the two ends of the fifth current bus 4e are respectively electrically connected to the male terminal 8a and the female terminal 8b; when two adjacent battery packs 100 are bundled together, the male terminal 8a of one battery pack 100 is used to dock with the female terminal 8b of the other battery pack 100.

[0057] In some embodiments, referring to Figures 4 and 5, the male terminal 8a includes a first positive terminal 81, a first negative terminal 82, and a first signal terminal 83, and the female terminal 8b includes a second positive terminal 801, a second negative terminal 802, and a second signal terminal 803. The two ends of the fourth current bus 4d are electrically connected to the first positive terminal 81 and the second positive terminal 801, respectively. The two ends of the fifth current bus 4e are electrically connected to the first negative terminal 82 and the second negative terminal 802, respectively. Both the first signal terminal 83 and the second signal terminal 803 are connected to the BMS board 6.

[0058] It is worth noting that in some embodiments, there are multiple first positive terminals 81 and multiple second positive terminals 801. The number of first positive terminals 81 and the number of second positive terminals 801 are the same. When two adjacent battery packs 100 are bundled together, a first positive terminal 81 of one battery pack 100 is used to connect with a second positive terminal 801 of the other battery pack 100. By setting multiple first positive terminals 81 and second positive terminals 801, large current can be shunted, reducing the current impact of large current on a single terminal and preventing burnout, thus enhancing the safety and stability of the terminal during use.

[0059] It is worth noting that in some embodiments, there are multiple first negative terminals 82 and multiple second negative terminals 802. The number of first negative terminals 82 and the number of second negative terminals 802 are the same. When two adjacent battery packs 100 are bundled together, a first negative terminal 82 of one battery pack 100 is used to connect with a second negative terminal 802 of the other battery pack 100. By setting multiple first negative terminals 82 and second negative terminals 802, the large current can be shunted, reducing the current impact of the large current on a single terminal and preventing burnout, thus enhancing the safety and stability of the terminal during use.

[0060] In some embodiments, along the mating direction D1 between the male terminal 8a of one battery pack 100 and the female terminal 8b of another battery pack 100, the size of the first positive terminal 81 is larger than the size of the first signal terminal 83, the size of the first negative terminal 82 is larger than the size of the first signal terminal 83, the size of the second positive terminal 801 is larger than the size of the second signal terminal 803, and the size of the second negative terminal 802 is larger than the size of the second signal terminal 803. With this configuration, when two adjacent battery packs 100 are connected together, power is applied first and then the signal is connected, enabling safe connection between the two adjacent battery packs 100. When the male terminal 8a of one battery pack 100 is pulled out from the female terminal 8b of another battery pack 100, the signal is disconnected first, the system triggers a power-off signal, and then the current loop is cut off, thus safely disconnecting the connection between the two adjacent battery packs 100.

[0061] It is worth noting that in some embodiments, the BMS board 6 is further provided with a parallel positive terminal 7c and a parallel negative terminal 7d. The parallel positive terminal 7c is electrically connected to the fourth current bus 4d, and the parallel negative terminal 7d is electrically connected to the fifth current bus 4e. Through the parallel positive terminal 7c and the parallel negative terminal 7d, large currents can be shunted, making it more suitable for low-voltage, high-current applications.

[0062] It is worth noting that in some embodiments, the number of parallel-enclosed positive terminals 7c is two, and the number of parallel-enclosed negative terminals 7d is two, thereby enabling better shunting of large currents.

[0063] In some embodiments, the fourth overcurrent bus 4d is provided with a third via 4d1, and the fifth overcurrent bus 4e is provided with a fourth via 4e1. The third via 4d1 is used for the parallel positive terminal 7c to be electrically connected to the fourth overcurrent bus 4d, and the fourth via 4e1 is used for the parallel negative terminal 7d to be electrically connected to the fifth overcurrent bus 4e.

[0064] It is worth noting that, in some embodiments, referring to Figures 6, 7, and 8, the battery pack 100 further includes a housing 1c. The housing 1c has a first side 1c1, an upper plate 1c2, a second side 1c3, and a lower plate 1c4 connected in sequence. The lower plate 1c4 is connected to the first side 1c1, and the upper plate 1c2 and the lower plate 1c4 are disposed opposite to each other. The female terminal 8b is disposed on the upper plate 1c2. The lower plate 1c4 is recessed in a direction away from the upper plate 1c2 to form a mounting groove 11s, and the male terminal 8a is located in the mounting groove 11s. A mounting hole 11h is provided at the bottom of the mounting groove 11s. The mounting groove 11s can protect the male terminal 8a, and the mounting hole 11h can realize the docking of the female terminal 8b and the male terminal 8a.

[0065] It is worth noting that in some embodiments, the battery pack 100 further includes a protective door 9, which covers the mounting hole 11h. The protective door 9 is rotatably connected to the lower plate 1c4 of the outer casing 1c. When two adjacent battery packs 100 are packed together, the female terminal 8b of one battery pack 100 pushes open the protective door 9 and connects with the male terminal 8a of the other battery pack 100. The protective door 9 protects the female terminal 8b and extends its service life.

[0066] In some embodiments, the protective door 9 is a double-leaf type.

[0067] In some embodiments, the protective door 9 is further provided with an elastic element (not shown) on the side facing the female terminal 8b. The elastic element may be a sheet or a spring.

[0068] It is worth noting that in some embodiments, the upper plate 1c2 is recessed towards the lower plate 1c4 to form a positioning groove 21s, and the female terminal 8b is disposed at the bottom of the positioning groove 21s. When two adjacent battery packs 100 are bundled together, the mounting groove 11s of one battery pack 100 is inserted into the positioning groove 21s of the other battery pack 100. With the positioning groove 21s, when two adjacent battery packs 100 are bundled together, no additional positioning device is needed, facilitating the docking of the male terminal 8a of one battery pack 100 with the female terminal 8b of the other battery pack 100.

[0069] It is worth noting that in some embodiments, the upper plate 1c2 is recessed in the direction away from the lower plate 1c4 to form a positioning protrusion 1c21, and the lower plate 1c4 is recessed in the direction towards the upper plate 1c2 to form a hollow groove 12s. When two adjacent battery packs 100 are packaged together, the positioning protrusion 1c21 of one battery pack 100 is inserted into the hollow groove 12s of the other battery pack 100. When two adjacent battery packs 100 are packaged together, both the positioning protrusion 1c21 and the hollow groove 12s are used for positioning.

[0070] It is worth noting that in some embodiments, referring to Figures 8 and 9, the male terminal 8a includes a first current-carrying plate 8a1, and the female terminal 8b includes two opposing second current-carrying plates 8b1. When two adjacent battery packs 100 are bundled together, the first current-carrying plate 8a1 of one battery pack 100 is inserted between the two second current-carrying plates 8b1 of the other battery pack 100. Through the first current-carrying plate 8a1 and the second current-carrying plate 8b1, an electrical connection is achieved between the male terminal 8a of one battery pack 100 and the female terminal 8b of the other battery pack 100 when two adjacent battery packs 100 are bundled together.

[0071] It is worth noting that in some embodiments, the battery pack 100 further includes a handle 10, which is rotatably connected to the outer casing 1c. A first connecting portion 101 is provided at the end of the handle 10 away from the outer casing 1c; the outer casing 1c is provided with a second connecting portion 1c11. When two adjacent battery packs 100 are packed together, the first connecting portion 101 of one battery pack 100 is used to connect with the second connecting portion 1c11 of the other battery pack 100. The battery pack 100 can be easily moved using the handle 10. Furthermore, the first connecting portion 101 at the end of the handle 10 away from the outer casing 1c enables connection between two adjacent battery packs 100, reducing the risk of connection failure of internal components during transport.

[0072] It is worth noting that the first connecting part 101 can be protruding, as shown in Figure 9, and the second connecting part 1c11 can be a groove, so that the first connecting part 101 of one battery pack 100 can be inserted into the second connecting part 1c11 of another battery pack 100 to realize the connection between two adjacent battery packs 100.

[0073] It is worth noting that the first connecting part 101 may be provided with a fixing screw 1011, as shown in Figure 10, so that the first connecting part 101 of one battery pack 100 can be screwed to the second connecting part 1c11 of another battery pack 100, thereby realizing the connection between two adjacent battery packs 100.

[0074] It is worth noting that there are two handles 10, one of which is rotatably connected to the first side 1c1, and the other is rotatably connected to the second side 1c3. There are also two second connecting parts 1c11, one of which is located on the first side 1c1, and the other is located on the second side 1c3.

[0075] It is worth noting that in some embodiments, the first cell 3a, the second cell 3b, and the third cell 3c of the battery pack 100 are all square cells, which make fuller use of the storage space of the battery pack 100 than the commonly used cylindrical cells, thus resulting in a higher volumetric energy density.

[0076] 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 pack, characterized in that, include: Base plate, top cover, BMS board, first battery cell, second battery cell, first current bus, second current bus and third current bus; The upper cover is detachably connected to the bottom plate; A receiving cavity is formed between the upper cover and the bottom plate, and the first battery cell and the second battery cell are housed in the receiving cavity; The BMS board is disposed on the upper cover; the BMS board is provided with a positive terminal and a negative terminal, the positive terminal is electrically connected to the second overcurrent bus, and the negative terminal is electrically connected to the first overcurrent bus; The first overcurrent bus is electrically connected to the negative terminal of the first battery cell, the second overcurrent bus is electrically connected to the positive terminal of the second battery cell, and the positive terminal of the first battery cell and the negative terminal of the second battery cell are electrically connected through the third overcurrent bus. The top cover includes a first folding plate, a first side plate, a top plate, a second side plate, and a second folding plate connected in sequence; the first side plate and the second side plate are arranged opposite to each other, and the receiving cavity is formed between the first side plate, the top plate, the second side plate, and the bottom plate; the first folding plate is connected to the side of the first side plate away from the top plate, and the second folding plate is connected to the side of the second side plate away from the top plate. The BMS board is disposed on the first side plate; the negative electrode of the first battery cell and the positive electrode of the second battery cell are both disposed close to the first side plate; The BMS board is also connected to a fourth current bus and a fifth current bus; the fourth current bus is electrically connected to the positive terminal, and the fifth current bus is electrically connected to the negative terminal; the two ends of the fourth current bus are electrically connected to a male terminal and a female terminal, respectively; the two ends of the fifth current bus are electrically connected to the male terminal and the female terminal, respectively; when two adjacent battery packs are bundled together, the male terminal of one battery pack is used to dock with the female terminal of the other battery pack.

2. The battery pack according to claim 1, characterized in that, The battery pack also includes at least one third cell, and the number of the third current busbars is at least two; The positive terminal of the first battery cell, at least one of the third battery cells, and the negative terminal of the second battery cell are connected in series via the third busbar.

3. The battery pack according to claim 1, characterized in that, The first folding plate is bent relative to the first side plate; the second folding plate is bent relative to the second side plate. The first folding plate is detachably connected to the base plate, and the second folding plate is detachably connected to the base plate.

4. The battery pack according to claim 3, characterized in that, The battery pack also includes a plurality of first pressing screws, which are distributed on the base plate; The upper cover is provided with a plurality of first through holes, which are distributed on the first folding plate and the second folding plate; The number of the first press-fit screws is the same as the number of the first through holes, with one first press-fit screw corresponding to one first through hole.

5. The battery pack according to claim 1, characterized in that, The BMS board is also provided with a positive terminal and a negative terminal, the positive terminal being electrically connected to the fourth busbar and the negative terminal being electrically connected to the fifth busbar.

6. The battery pack according to claim 1, characterized in that, The battery pack also includes a housing, which has a first side, an upper plate, a second side and a lower plate connected in sequence. The lower plate is connected to the first side, and the upper plate and the lower plate are disposed opposite to each other. The female terminal is disposed on the upper plate body; The lower plate is recessed in a direction away from the upper plate to form a mounting groove, and the male terminal is located in the mounting groove; The bottom of the mounting groove is provided with mounting holes.

7. The battery pack according to claim 6, characterized in that, The battery pack also includes a protective door, which is disposed on the mounting hole and is rotatably connected to the lower plate. When two adjacent battery packs are packed together, the female terminal of one battery pack pushes open the protective door and connects with the male terminal of the other battery pack.

8. The battery pack according to claim 6, characterized in that, The upper plate is recessed towards the lower plate to form a positioning groove, and the female terminal is disposed at the bottom of the positioning groove; When two adjacent battery packs are packaged together, the mounting slot of one battery pack is inserted into the positioning slot of the other battery pack.

9. The battery pack according to claim 1, characterized in that, The male terminal includes a first current-passing plate, and the female terminal includes two oppositely arranged second current-passing plates. When two adjacent battery packs are bundled together, the first current-passing plate of one battery pack is inserted between the two second current-passing plates of the other battery pack.

10. The battery pack according to claim 6, characterized in that, The battery pack also includes a handle, which is rotatably connected to the housing, and a first connecting portion is provided at the end of the handle away from the housing; The housing is provided with a second connecting portion, and when two adjacent battery packs are packaged together, the first connecting portion of one of the battery packs is used to connect with the second connecting portion of the other battery pack.

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