CN119495889A - Battery pack - Google Patents

Abstract

The embodiment of the application relates to the technical field of energy storage, in particular to a battery pack, which comprises a bottom plate, an upper cover, a BMS plate, a first electric core, a second electric core, a first overcurrent row, a second overcurrent row and a third overcurrent row, wherein the upper cover is detachably connected with the bottom plate, a containing cavity is formed between the upper cover and the bottom plate, the first electric core and the second electric core are contained in the containing cavity, the BMS plate is arranged on the upper cover, an anode terminal and a cathode terminal are arranged on the BMS plate, the anode terminal is electrically connected with the second overcurrent row, the cathode terminal is electrically connected with the first overcurrent row, the first overcurrent row is electrically connected with the cathode of the first electric core, the second overcurrent row is electrically connected with the anode of the second electric core, and the anode of the first electric core and the cathode of the second electric core are electrically connected through the third overcurrent row. The battery pack includes a first cell and a second cell, and the present application increases the volumetric energy density of the battery pack relative to the prior art battery packs that include one cell.

Description

Battery pack

Technical Field

The embodiment of the application relates to the technical field of energy storage, in particular to a battery pack.

Background

The battery pack is a device for converting external energy into electric energy and storing the electric energy, can supply power for external electric equipment (such as portable energy storage equipment) when needed, is widely applied to daily life, and provides great convenience and richness for daily life of people. The conventional Battery pack includes a BMS (Battery MANAGEMENT SYSTEM) board and a Battery cell, the Battery cell is electrically connected with the BMS board, and the BMS board is used for performing charge and discharge control on the Battery cell.

With the continuous development of the energy storage industry, the capacity requirement of the battery pack in a certain accommodating space is continuously increased.

Disclosure of Invention

In view of the above, embodiments of the present application provide a battery pack that overcomes or at least partially solves the above-described problems.

According to one aspect of the embodiment of the application, a battery pack is provided, which comprises a bottom plate, an upper cover, a first electric core, a second electric core, a first overcurrent row, a second overcurrent row and a third overcurrent row, wherein the upper cover is detachably and electrically connected with the bottom plate, a containing cavity is formed between the upper cover and the bottom plate, the first electric core and the second electric core are contained in the containing cavity, the BMS board is arranged on the upper cover, a positive electrode terminal and a negative electrode terminal are arranged on the BMS board, the positive electrode terminal is electrically connected with the second overcurrent row, the negative electrode terminal is electrically connected with the first overcurrent row, the first overcurrent row is electrically connected with the negative electrode of the first electric core, the second overcurrent row is electrically connected with the positive electrode of the second electric core, and the positive electrode of the first electric core and the negative electrode of the second electric core are electrically connected through the third overcurrent row.

In an alternative mode, the battery pack further comprises at least one third electric core, the number of the third overcurrent rows is at least two, and the positive electrode of the first electric core, the at least one third electric core and the negative electrode of the second electric core are connected in series through the third overcurrent rows.

In an optional mode, the upper cover comprises a first folded plate, a first side plate, an upper plate, a second side plate and a second folded plate which are sequentially connected, the first side plate and the second side plate are oppositely arranged, the accommodating cavity is formed among the first side plate, the upper plate, the second side plate and the bottom plate, the first folded plate is connected with one side, far away from the upper plate, of the first side plate, the first folded plate is bent and arranged relative to the first side plate, the second folded plate is connected with one side, far away from the upper plate, of the second side plate, the second folded plate is bent and arranged relative to the second side plate, the first folded plate is detachably connected with the bottom plate, and the second folded plate is detachably connected with the bottom plate.

In an optional mode, the battery pack further comprises a plurality of first riveting screws, the first riveting screws are distributed on the bottom plate, the upper cover is provided with a plurality of first through holes, the first through holes are distributed on the first folded plate and the second folded plate, the number of the first riveting screws is the same as that of the first through holes, and one first riveting screw corresponds to one first through hole.

In an alternative, the BMS board is disposed at the first side plate.

In an alternative mode, the BMS board is further connected with a fourth overcurrent row and a fifth overcurrent row, the fourth overcurrent row is electrically connected with the positive electrode terminal, the fifth overcurrent row is electrically connected with the negative electrode terminal, two ends of the fourth overcurrent row are respectively electrically connected with a male terminal and a female terminal, two ends of the fifth overcurrent row are respectively electrically connected with the male terminal and the female terminal, and when two adjacent battery packs are combined, the male terminal of one battery pack is used for being in butt joint with the female terminal of the other battery pack.

In an alternative manner, the BMS board is further provided with a positive and a negative shunt terminals, the positive shunt terminal is electrically connected with the fourth overcurrent row, and the negative shunt terminal is electrically connected with the fifth overcurrent row.

In an optional mode, the battery pack further comprises a shell, wherein the shell is provided with a first side face, an upper plate body, a second side face and a lower plate body which are sequentially connected, the lower plate body is connected with the first side face, the upper plate body and the lower plate body are oppositely arranged, the female terminal is arranged on the upper plate body, the lower plate body is recessed towards the direction deviating from the upper plate body to form a mounting groove, the male terminal is located in the mounting groove, and a mounting hole is formed in the bottom of the mounting groove.

In an optional manner, the battery pack further comprises a protection door, the protection door cover is arranged on the mounting hole, the protection door is rotationally connected with the lower plate body, and when two adjacent battery packs are combined, after the female terminal of one battery pack pushes away the protection door, the protection door is in butt joint with the male terminal of the other battery pack.

In an optional mode, the upper plate body is sunken towards the lower plate body to form a positioning groove, the female terminal is arranged at the bottom of the positioning groove, and when two adjacent battery packs are combined, the mounting groove of one battery pack is inserted into the positioning groove of the other battery pack.

In an alternative manner, the male terminal includes a first overcurrent piece, the female terminal includes two second overcurrent pieces arranged opposite to each other, and when two adjacent battery packs are combined, the first overcurrent piece of one battery pack is inserted between the two second overcurrent pieces of the other battery pack.

In an alternative mode, the battery pack further comprises a handle, the handle is rotatably connected with the shell, a first connecting part is arranged at one end, far away from the shell, of the handle, a second connecting part is arranged at the shell, and when two adjacent battery packs are combined, the first connecting part of one battery pack is used for being connected with the second connecting part of the other battery pack.

The battery pack comprises a bottom plate, an upper cover, a first electric core, a second electric core, a first overcurrent row, a second overcurrent row and a third overcurrent row, wherein the upper cover is detachably and electrically connected with the bottom plate, a containing cavity is formed between the upper cover and the bottom plate, the first electric core and the second electric core are contained in the containing cavity, the BMS plate is arranged on the upper cover, a positive electrode terminal and a negative electrode terminal are arranged on the BMS plate, the positive electrode terminal is electrically connected with the second overcurrent row, the negative electrode terminal is electrically connected with the first overcurrent row, the first overcurrent row is electrically connected with the negative electrode of the first electric core, the second overcurrent row is electrically connected with the positive electrode of the second electric core, and the positive electrode of the first electric core and the negative electrode of the second electric core are electrically connected through the third overcurrent row. The battery pack comprises a first battery cell and a second battery cell, and compared with the case that the battery pack in the prior art comprises one battery cell, the volume energy density of the battery pack is increased.

In addition, the first electric core and the second electric core are arranged between the accommodating cavities formed by the bottom plate and the upper cover, the first electric core and the second electric core are protected, and the first electric core and the second electric core are grouped through the bottom plate and the upper cover, so that the battery pack is convenient to transport and convenient to pack in a plurality of subsequent battery packs.

In addition, the first battery cells and the second battery cells can be grouped through the bottom plate and the upper cover, the mounting process is simple, and the cost is saved.

In addition, the first battery core and the second battery core are electrically connected through the third overcurrent row, so that the internal impedance can be reduced, and the battery is suitable for application scenes of low voltage and high current.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

FIG. 1 is a schematic diagram of one implementation of a battery pack provided by an embodiment of the present application;

FIG. 2 is a schematic view of a partial explosion of one implementation of a battery pack provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of another implementation of a battery pack provided by an embodiment of the present application;

Fig. 4 is a schematic diagram of a male terminal and a female terminal according to an embodiment of the present application connected to a fourth overcurrent row and a fifth overcurrent row;

FIG. 5 is a schematic view of a male terminal provided by an embodiment of the present application;

FIG. 6 is a schematic diagram of yet another implementation of a battery pack provided by an embodiment of the present application;

FIG. 7 is a cross-sectional view taken along P in FIG. 6, provided by an embodiment of the present application;

FIG. 8 is a cross-sectional view of one implementation of two battery packs that are provided and packaged in accordance with an embodiment of the application;

FIG. 9 is an enlarged schematic view of portion A of FIG. 8 provided by an embodiment of the present application;

fig. 10 is a cross-sectional view of another implementation of two battery packs that are provided and packaged in accordance with an embodiment of the application.

Detailed Description

In order that the application may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. It will be understood that when an element is referred to as being "mounted" to another element, it can be directly on the other element or one or more intervening elements may be present therebetween. When an element is referred to as being "electrically connected" to another element, it can be directly electrically connected to the other element or one or more intervening elements may be present therebetween. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and the like are used in this specification for purposes of illustration only.

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

Referring to fig. 1,2 and 3, the embodiment of the application provides a Battery pack 100, wherein the Battery pack 100 comprises a bottom plate 1, an upper cover 2, a first electric core 3a, a second electric core 3b, a first overcurrent row 4a, a second overcurrent row 4b, a third overcurrent row 4c and a BMS (Battery management system) board 6, the upper cover 2 is detachably connected with the bottom plate 1, a containing cavity 2s is formed between the upper cover 2 and the bottom plate 1, the first electric core 3a and the second electric core 3b are contained in the containing cavity 2s, the BMS board 6 is arranged on the upper cover 2, an anode terminal 7a and a cathode terminal 7b are arranged on the BMS board 6, the anode terminal 7a is electrically connected with the second overcurrent row 4b, the cathode terminal 7b is electrically connected with the first overcurrent row 4a, the first overcurrent row 4a is electrically connected with the anode terminal 3a of the first electric core 3a, and the cathode terminal 3b of the second electric core 3b is electrically connected with the anode terminal 3b of the second overcurrent row 4 b. The battery pack 100 includes a first cell 3a and a second cell 3b, and the present application increases the volumetric energy density of the battery pack 100 relative to the case where the battery pack of the related art includes one cell.

In addition, the first electric core 3a and the second electric core 3b are arranged between the accommodating cavities 2s formed by the bottom plate 1 and the upper cover 2, so that the first electric core 3a and the second electric core 3b are protected, and the first electric core 3a and the second electric core 3b are grouped through the bottom plate 1 and the upper cover 2, so that the battery pack 100 is convenient to transport and convenient to package.

In addition, the first battery cell 3a and the second battery cell 3b can be grouped through the bottom plate 1 and the upper cover 2, so that the installation process is simple and convenient, and the cost is saved.

In addition, the first electric core 3a and the second electric core 3b are electrically connected through the third overcurrent row 4c, so that the internal impedance can be reduced, and the method is suitable for application scenes of low voltage and large current.

In addition, through the arrangement of the BMS plate 6, the positive electrode terminal 7a and the negative electrode terminal 7b, the first battery cell 3a and the second battery cell 3b are convenient to monitor, and two adjacent battery packs 100 are convenient to pack in parallel.

It should be noted that, in some embodiments, the battery pack 100 further includes at least one third cell 3c, where the number of the third overcurrent rows 4c is at least two, and the positive electrode of the first cell 3a, the at least one third cell 3c, and the negative electrode of the second cell 3b are connected in series through the third overcurrent row 4 c.

It is understood that the number of the third overcurrent rows 4c is one more than the number of the third battery cells 3 c. For example, the number of the third battery cells 3c is two, and the number of the third overcurrent rows 4c is three. The positive electrode of the first electric core 3a, at least one third electric core 3c and the negative electrode of the second electric core 3b are connected in series through the third overcurrent row 4c in a specific mode that the positive electrode of the first electric core 3a is connected with the negative electrode of one of the third electric cores 3c through one third overcurrent row 4c, the positive electrode of one of the third electric cores 3c is connected with the negative electrode of the other third electric core 3c through the other third overcurrent row 4c, and the positive electrode of the other third electric core 3c is connected with the negative electrode of the second electric core 3b through the other third overcurrent row 4 c.

It should be noted that, in some embodiments, the first cell 3a, the second cell 3b, and the third cell 3c are stacked in a regular arrangement.

It should be noted that, in some embodiments, the first current passing row 4a is electrically connected to the negative electrode of the first electric cell 3a by means of laser welding.

It should be noted that, in some embodiments, the second current passing row 4b is electrically connected to the positive electrode of the second electric core 3b by means of laser welding.

It should be noted that, in some embodiments, the positive electrode of the first cell 3a, at least one of the third cells 3c, and the negative electrode of the second cell 3b are connected in series through the third current through-row 4c by using laser welding.

It should be noted that, in some embodiments, the upper cover 2 includes a first folded plate 21, a first side plate 22, an upper plate 23, a second side plate 24 and a second folded plate 25 connected in sequence, where the first side plate 22 and the second side plate 24 are disposed opposite to each other, the accommodating 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 folded plate 21 is connected to a side of the first side plate 22 away from the upper plate 23, the first folded plate 21 is folded and disposed relative to the first side plate 22, the second folded plate 25 is connected to a side of the second side plate 24 away from the upper plate 23, the second folded plate 25 is folded and disposed relative to the second side plate 24, the first folded plate 21 is detachably connected to the bottom plate 1, and the second folded plate 25 is detachably connected to the bottom plate 1. Through the upper cover 2 and the bottom plate 1, the first battery cells 3a and the second battery cells 3b can be grouped, so that the transportation and the subsequent combination of a plurality of battery packs 100 are facilitated.

It will be appreciated that the first flap 21 is preferably connected to the side of the first side panel 22 facing away from the receiving cavity 2s, and the second flap 25 is preferably connected to the side of the second side panel 24 facing away from the receiving cavity 2s, thereby facilitating the removable assembly of the upper cover 2 with the base panel 1.

It should be noted that, in some embodiments, the battery pack 100 further includes a plurality of first rivet screws 5a, the plurality of first rivet screws 5a are distributed on the bottom plate 1, the upper cover 2 is provided with a plurality of first through holes 2h, the plurality of first through holes 2h are distributed on the first folded plate 21 and the second folded plate 25, the number of the first rivet screws 5a is the same as the number of the first through holes 2h, and one first rivet screw 5a corresponds to one first through hole 2h. The first riveting screw 5a is used for being inserted into the first through hole 2h. Through the arrangement of the first riveting screw 5a and the first through hole 2h, the upper cover 2 and the bottom plate 1 can be detachably connected by matching nuts.

It is worth noting that in some embodiments, bolts or studs may be used instead of the first clinch screws 5a.

It should be noted that, in some embodiments, when the upper cover 2 includes the first flap 21, the first side panel 22, the upper panel 23, the second side panel 24, and the second flap 25 connected in sequence, the BMS panel 6 is specifically disposed on the first side panel 22. Because the BMS board 6 is provided with the positive electrode terminal 7a and the negative electrode terminal 7b, the positive electrode terminal 7a is electrically connected with the second overcurrent row 4b, and the negative electrode terminal 7b is electrically connected with the first overcurrent row 4a, the first overcurrent row 4a can be close to the first side plate 22, so that the distance between the first overcurrent row 4a and the negative electrode terminal 7a is shortened, the first battery cell 3a can be conveniently electrically connected with the BMS board 6 through the first overcurrent row 4a, the second overcurrent row 4b can be close to the first side plate 22, the distance between the second overcurrent row 4b and the positive electrode terminal 7a is shortened, and the second battery cell 3b can be conveniently connected with the BMS board 6 through the second overcurrent row 4 b.

In some embodiments, the first side plate 22 is provided with a plurality of second riveting screws 5b, the plurality of second riveting screws 5b are distributed on the first side plate 22, the BMS plate 6 is provided with a plurality of second through holes (not labeled), the plurality of second through holes are distributed on the BMS plate 6, one second riveting screw 5b corresponds to one second through hole, one second riveting screw 5b is used for being inserted into one second through hole, and through the arrangement of the second riveting screws 5b and the second through holes, the upper cover 2 and the BMS plate 6 can be detachably connected by matching nuts.

It is worth noting that in some embodiments, bolts or studs may be used instead of the second clinch screws 5b.

In some embodiments, the number of the positive terminals 7a is at least two, and the number of the negative terminals 7b is at least two, so that the large current can be split, the current impact of the large current on a single terminal is reduced, and the damage is avoided.

It should be noted that, in some embodiments, the BMS board 6 is further connected with a fourth overcurrent row 4d and a fifth overcurrent row 4e, the fourth overcurrent row 4d is electrically connected with the positive terminal 7a, the fifth overcurrent row 4e is electrically connected with the negative terminal 7b, two ends of the fourth overcurrent row 4d are respectively electrically connected with the male terminal 8a and the female terminal 8b, two ends of the fifth overcurrent row 4e are respectively electrically connected with the male terminal 8a and the female terminal 8b, and when two adjacent battery packs 100 are combined, the male terminal 8a of one battery pack 100 is used for being butted with the female terminal 8b of the other battery pack 100.

In some embodiments, referring to fig. 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. Both ends of the fourth overcurrent row 4d are electrically connected to the first positive terminal 81 and the second positive terminal 801, respectively. Both ends of the fifth overcurrent row 4e are electrically connected to the first negative terminal 82 and the second negative terminal 802, respectively. The first and second signal terminals 83 and 803 are connected to the BMS board 6.

It should be noted that, in some embodiments, the number of the first positive terminals 81 is plural, the number of the second positive terminals 801 is plural, the number of the first positive terminals 81 is the same as the number of the second positive terminals 801, when two adjacent battery packs 100 are combined, one of the first positive terminals 81 of one battery pack 100 is used for butt-jointing with one of the second positive terminals 801 of the other battery pack 100, and through the arrangement of the plurality of first positive terminals 81 and the second positive terminals 801, a large current can be split, so that the current impact of the large current on a single terminal is reduced, the burnout is caused, and the safety and stability of the terminal in the use process are enhanced.

It should be noted that, in some embodiments, the number of the first negative terminals 82 is plural, the number of the second negative terminals 802 is plural, the number of the first negative terminals 82 is the same as the number of the second negative terminals 802, when two adjacent battery packs 100 are combined, one of the first negative terminals 82 of one of the battery packs 100 is used to interface with one of the second negative terminals 802 of the other battery pack 100, and by the arrangement of the first negative terminals 82 and the second negative terminals 802, a large current can be split, so that the current impact of the large current on a single terminal is reduced, and the burnout is caused, thereby enhancing the safety and stability of the terminal in use.

In some embodiments, the first positive terminal 81 has a size higher than the first signal terminal 83, the first negative terminal 82 has a size higher than the first signal terminal 83, the second positive terminal 801 has a size higher than the second signal terminal 803, and the second negative terminal 802 has a size higher than the second signal terminal 803 in the mating direction D1 of the male terminal 8a of one of the battery packs 100 and the female terminal 8b of the other of the battery packs 100. By means of the arrangement, when two adjacent battery packs 100 are combined, the power is firstly supplied and then signals are communicated, so that safety combination between the two adjacent battery packs 100 can be realized, when the male terminal 8a of one battery pack 100 is pulled out from the female terminal 8b of the other battery pack 100, the signals are firstly disconnected, the system triggers the power-off signals, and then the power-off loop is disconnected, so that connection between the two adjacent battery packs 100 can be safely disconnected.

It should be noted that, in some embodiments, the BMS board 6 is further provided with a positive terminal 7c and a negative terminal 7d, the positive terminal 7c is electrically connected to the fourth overcurrent row 4d, and the negative terminal 7d is electrically connected to the fifth overcurrent row 4 e. Through the parallel positive terminal 7c and the parallel negative terminal 7d, the high current can be split, and the parallel positive terminal and the parallel negative terminal are more suitable for the application scene of low-voltage high current.

It should be noted that in some embodiments, the number of the combined positive terminals 7c is two, and the number of the combined negative terminals 7d is two, so that the large current can be better split.

In some embodiments, the fourth current-passing row 4d is provided with a third via 4d1, the fifth current-passing row 4e is provided with a fourth via 4e1, the third via 4d1 is used for electrically connecting the parallel positive terminal 7c with the fourth current-passing row 4d, and the fourth via 4e1 is used for electrically connecting the parallel negative terminal 7d with the fifth current-passing row 4 e.

It should be noted that, in some embodiments, referring to fig. 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, the upper plate 1c2 and the lower plate 1c4 are oppositely disposed, the female terminal 8b is disposed on the upper plate 1c2, the lower plate 1c4 is recessed towards a direction away from the upper plate 1c2 to form a mounting groove 11s, the male terminal 8a is located in the mounting groove 11s, and a mounting hole 11h is formed at a bottom of the mounting groove 11 s. The male terminal 8a can be protected by the mounting groove 11s, and the female terminal 8b and the male terminal 8a can be abutted by the mounting hole 11h.

It should be noted that, in some embodiments, the battery pack 100 further includes a protection door 9, where the protection door 9 is covered on the mounting hole 11h, the protection door 9 is rotatably connected to the lower plate 1c4 of the housing 1c, and when two adjacent battery packs 100 are combined, after the female terminal 8b of one battery pack 100 pushes the protection door 9 open, the protection door is abutted with the male terminal 8a of the other battery pack 100. The protection door 9 protects the female terminal 8b, and prolongs the service life of the female terminal 8 b.

In some embodiments, the protection door 9 is of a two-piece type.

In some embodiments, an elastic member (not shown) is further provided on a side of the protection door 9 facing the female terminal 8 b. The elastic piece can be a shrapnel or a spring.

It should be noted that, in some embodiments, the upper plate 1c2 is recessed toward the lower plate 1c4 to form a positioning groove 21s, the female terminal 8b is disposed at a bottom of the positioning groove 21s, and when two adjacent battery packs 100 are assembled, the mounting groove 11s of one battery pack 100 is inserted into the positioning groove 21s of the other battery pack 100. By the arrangement of the positioning grooves 21s, when two adjacent battery packs 100 are combined, the male terminal 8a of one battery pack 100 can be conveniently abutted with the female terminal 8b of the other battery pack 100 without an additional positioning device.

It should be noted that, in some embodiments, the upper plate 1c2 is recessed toward a direction away from the lower plate 1c4 to form a positioning protrusion 1c21, and the lower plate 1c4 is recessed toward the upper plate 1c2 to form a hollowed-out groove 12s, and when two adjacent battery packs 100 are combined, the positioning protrusion 1c21 of one battery pack 100 is inserted into the hollowed-out groove 12s of the other battery pack 100. When two adjacent battery packs 100 are combined, the positioning protrusions 1c21 and the hollowed-out grooves 12s are used for positioning.

It should be noted that, in some embodiments, referring to fig. 8 and 9, the male terminal 8a includes a first overcurrent piece 8a1, the female terminal 8b includes two second overcurrent pieces 8b1 disposed opposite to each other, and when two adjacent battery packs 100 are combined, the first overcurrent piece 8a1 of one battery pack 100 is inserted between the two second overcurrent pieces 8b1 of the other battery pack 100. By the first and second overcurrent pieces 8a1 and 8b1, when two adjacent battery packs 100 are combined, electrical connection between the male terminal 8a of one battery pack 100 and the female terminal 8b of the other battery pack 100 is achieved.

It should be noted that, in some embodiments, the battery pack 100 further includes a handle 10, the handle 10 is rotatably connected to the housing 1c, a first connection portion 101 is disposed at an end of the handle 10 away from the housing 1c, and the housing 1c is provided with a second connection portion 1c11, where the first connection portion 101 of one of the battery packs 100 is used to connect with the second connection portion 1c11 of the other battery pack 100 when two adjacent battery packs 100 are combined. The battery pack 100 can be conveniently moved by the handle 10 when being moved. In addition, by the first connection portion 101 provided at the end of the handle 10 remote from the housing 1c, connection between two adjacent battery packs 100 can be achieved, reducing the risk of connection failure of the internal components of the battery packs 100 when the battery packs 100 are jolt in transportation.

It should be noted that, the first connection portion 101 may be in a convex shape, for example, as shown in fig. 9, and the second connection portion 1c11 may be a groove, so that the first connection portion 101 of one battery pack 100 may be plugged with the second connection portion 1c11 of another battery pack 100, so as to achieve connection between two adjacent battery packs 100.

It should be noted that, the first connection portion 101 may be provided with a fixing screw 1011, as shown in fig. 10, for example, so that the first connection portion 101 of one battery pack 100 may be screwed with the second connection portion 1c11 of another battery pack 100 to achieve connection between two adjacent battery packs 100.

It should be noted that the number of the handles 10 is two, one handle 10 is rotatably connected to the first side 1c1, and one handle 10 is rotatably connected to the second side 1c3. The number of the second connecting portions 1c11 is two, one second connecting portion 1c11 is disposed on the first side surface 1c1, and one second connecting portion 1c11 is disposed on the second side surface 1c3.

It should be noted that, in some embodiments, the first battery cell 3a, the second battery cell 3b, and the third battery cell 3c of the battery pack 100 all adopt square battery cells, and the accommodating space of the battery pack 100 is more fully utilized than a common cylindrical battery cell, so the volumetric energy density is greater.

It should be noted that while the present application has been illustrated in the drawings and described in connection with the preferred embodiments thereof, it is to be understood that the application may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but are to be construed as providing a full breadth of the disclosure. The above technical features are further combined with each other to form various embodiments which are not listed above and are all considered as the scope of the present application described in the specification, further, the improvement or transformation can be carried out by the person skilled in the art according to the above description, and all the improvements and transformation shall fall within the protection scope of the appended claims.

Claims (12)

1. The battery pack is characterized by comprising a bottom plate, an upper cover, a BMS plate, a first electric core, a second electric core, a first overcurrent row, a second overcurrent row and a third overcurrent row;

The upper cover is detachably connected with the bottom plate;

An accommodating cavity is formed between the upper cover and the bottom plate, and the first battery cell and the second battery cell are accommodated in the accommodating cavity;

The BMS board is provided with a positive terminal and a negative terminal, the positive terminal is electrically connected with the second overcurrent row, and the negative terminal is electrically connected with the first overcurrent row;

the first overcurrent row is electrically connected with the negative electrode of the first electric core, the second overcurrent row is electrically connected with the positive electrode of the second electric core, and the positive electrode of the first electric core and the negative electrode of the second electric core are electrically connected through the third overcurrent row.

2. The battery pack of claim 1, further comprising at least one third cell, the number of third overcurrent rows being at least two;

The positive electrode of the first battery cell, at least one third battery cell and the negative electrode of the second battery cell are connected in series through the third overcurrent row.

3. The battery pack of claim 1, wherein the upper cover comprises a first flap, a first side panel, an upper panel, a second side panel, and a second flap connected in sequence;

the first side plate and the second side plate are oppositely arranged, and the accommodating cavity is formed among the first side plate, the upper plate, the second side plate and the bottom plate;

the first folded plate is connected with one side, far away from the upper plate, of the first side plate, and the first folded plate is bent and arranged relative to the first side plate;

the second folded plate is connected with one side, far away from the upper plate, of the second side plate, and the second folded plate is bent and arranged relative to the second side plate;

The first folded plate is detachably connected with the bottom plate, and the second folded plate is detachably connected with the bottom plate.

4. The battery pack of claim 3, further comprising a plurality of first clinch screws, the first press riveting screws are distributed on the bottom plate;

the upper cover is provided with a plurality of first through holes which are distributed in the first folded plate and the second folded plate;

the number of the first riveting screws is the same as that of the first through holes, and one first riveting screw corresponds to one first through hole.

5. The battery pack of claim 3, wherein the BMS board is disposed at the first side plate.

6. The battery pack according to any one of claims 1 to 5, wherein the BMS board is further connected with a fourth overcurrent row and a fifth overcurrent row;

The fourth overcurrent row is electrically connected with the positive electrode terminal, and the fifth overcurrent row is electrically connected with the negative electrode terminal;

The two ends of the fourth overcurrent row are respectively and electrically connected with a male terminal and a female terminal;

two ends of the fifth overcurrent row are respectively and electrically connected with the male terminal and the female terminal;

When two adjacent battery packs are combined, the male terminal of one battery pack is used for being in butt joint with the female terminal of the other battery pack.

7. The battery pack of claim 6, wherein the BMS board is further provided with a positive terminal electrically connected to the fourth overcurrent row and a negative terminal electrically connected to the fifth overcurrent row.

8. The battery pack of claim 6, further comprising a housing having a first side, an upper plate, a second side, and a lower plate connected in sequence, the lower plate being connected to the first side, the upper and lower plates being disposed opposite each other;

The female terminal is arranged on the upper plate body;

the lower plate body is recessed towards the direction away from the upper plate body to form a mounting groove, and the male terminal is positioned in the mounting groove;

And the bottom of the mounting groove is provided with a mounting hole.

9. The battery pack according to claim 8, further comprising a protection door, wherein the protection door cover is provided in the mounting hole, the protection door is rotatably connected with the lower plate body, and when two adjacent battery packs are combined, the female terminal of one battery pack pushes the protection door open and then is butted with the male terminal of the other battery pack.

10. The battery pack according to claim 8, wherein the upper plate body is recessed toward the lower plate body to form a positioning groove, and the female terminal is provided at a groove bottom of the positioning groove;

When two adjacent battery packs are combined, the mounting groove of one battery pack is inserted into the positioning groove of the other battery pack.

11. The battery pack of claim 6, wherein the male terminal comprises a first overcurrent tab and the female terminal comprises two oppositely disposed second overcurrent tabs, wherein the first overcurrent tab of one battery pack is inserted between the two second overcurrent tabs of the other battery pack when two adjacent battery packs are combined.

12. The battery pack of claim 8, further comprising a handle rotatably coupled to the housing, the handle having a first coupling portion disposed at an end thereof remote from the housing;

The shell is provided with a second connecting part, and when two adjacent battery packs are combined, the first connecting part of one battery pack is used for being connected with the second connecting part of the other battery pack.