CN111477828A - Battery module and battery module and automobile having the same - Google Patents

Abstract

The invention discloses a battery module, a battery module having the same, and an automobile. The battery module includes: a plurality of stacked bodies, a first tab protection case and a second tab protection case, and the stacked body includes a plurality of stacked battery cells, adjacent to each other. A structural glue is arranged between the two cells, and the positive electrode tab ends of the plurality of cells are stacked and welded to form a positive electrode tab area, and the negative electrode tab ends of the plurality of cells are stacked and welded to form a negative electrode tab area, which are adjacent to each other. In the two stacks, the positive electrode tab area of one stack is stacked and welded with the negative electrode tab area of the other stack to form a cascade welding area; the first tab protection shell is respectively clamped with the upper end and the lower end of the cascade welding area, And the first tab protective shell is provided with a first through hole and a first groove, and the first groove is provided with a first threaded hole; the second tab protective shell and the positive tab area of the stack located at the end Or the negative electrode tab area is clamped, and the second tab protective shell is provided with a second through hole and a second groove, and the second groove is provided with a second threaded hole.

Description

Battery module and battery module and automobile having the same

technical field

The invention belongs to the field of batteries, and in particular relates to a battery module, a battery module having the same, and an automobile.

Background technique

With the continuous popularization of new energy vehicles, the requirements for the use of power batteries in new energy vehicles have become higher and higher. In particular, users' requirements for the mileage of new energy vehicles continue to increase. Common new energy vehicles, as the power battery pack of new energy vehicles, are more than 1 meter in length and width; and currently on the market, the length of battery modules is generally about 0.3 meters, so in the power battery pack, it is necessary to Set at least 3, or even more battery modules.

When a plurality of battery modules are arranged, a fixing structure needs to be added to each battery module, and at the same time, a power connection between two adjacent battery modules needs to be performed through a power connector of a peripheral device. As a result, there are many battery module installation structures, which not only increases the cost, but also leads to an increase in the overall weight; at the same time, within the volume of a single module, the installation structure occupies a lot of internal space, resulting in a reduction in the overall capacity of the power battery module and battery pack, and the battery pack. The more internal battery modules are set up, the more space is wasted. In addition, since multiple external power connectors need to be provided for power connection, the internal resistance and cost are increased, and the internal friction and cost of the power battery pack in use are increased.

SUMMARY OF THE INVENTION

The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an object of the present invention is to provide a battery module, a battery module having the same, and an automobile, the battery module omits the connection accessory copper bars of the parallel connection of the cells and the serial connection of the stack, thereby reducing the cost and cost of the module. weight and improve space utilization.

In one aspect of the present invention, the present invention provides a battery module. According to an embodiment of the present invention, the battery module includes:

A plurality of stacked bodies, the stacked body includes a plurality of stacked battery cells, a structural adhesive is arranged between two adjacent battery cells, and the positive electrode tab ends of the plurality of battery cells are stacked and welded to form a positive electrode In the tab area, the negative electrode tab ends of a plurality of the battery cells are stacked and welded to form a negative electrode tab area, and the positive electrode tab area of one of the two adjacent stacks and the other one The negative electrode tab area is laminated and welded to form a cascade welding area;

a first tab protection shell, the first tab protection shell is respectively clamped with the upper end and the lower end of the cascade welding area, and the first tab protection shell is provided with a first through hole and a first concave a groove, wherein a first threaded hole is arranged in the first groove;

A second tab protective shell, the second tab protective shell is snap-connected to the positive tab region or the negative tab region of the stack located at the end, and the second tab protective shell A second through hole and a second groove are arranged thereon, and a second threaded hole is arranged in the second groove.

According to the battery module of the embodiment of the present invention, a stack is formed by laminating a plurality of cells through structural glue, and the positive electrode tab ends of the cells in the same stack are stacked and welded to form a positive electrode tab region. The negative electrode tab ends of the cell are stacked and welded to form a negative electrode tab area, and the positive electrode tab area of one stack and the negative electrode tab area of the other stack in two adjacent stacks are welded to form a cascade welding area. The upper and lower ends of the cascade welding area are clamped with the first tab protection case, and the second tab protection case is clamped at the positive tab area or the negative electrode tab area of the stack located at the end. The first tab protection case and The arrangement of the second tab protection shell can not only effectively protect the cascading welding area, the positive tabs and the negative tabs of the end stack, improve the stability of the battery module, but also facilitate the quick installation of the subsequent side plates. In some battery modules, the cells in the same stack are connected in parallel by copper bars, and the two adjacent stacks are connected in series by copper bars. The battery module of the present application omits the connection accessories for the parallel connection of the cells and the series connection of the stacks. Copper bars, thereby reducing the cost and weight of the module and improving space utilization.

In addition, the battery module according to the above embodiments of the present invention may also have the following additional technical features:

In some embodiments of the present invention, the positive electrode tab is provided with a first structural hole, the negative electrode tab is provided with a second structural hole, and the positive electrode tab area is provided with a plurality of the first structures A first through channel formed by a hole, and a plurality of second through channels formed by the second structural holes are provided in the negative electrode tab region. In this way, it is beneficial to the rapid stacking and installation of the cells.

In some embodiments of the present invention, in the cascade welding area, the first through channel and the second through channel penetrate through to form an auxiliary connection channel, and an auxiliary connection member is provided in the auxiliary connection channel. Thereby, the reliability of the internal connection of the battery module can be improved.

In some embodiments of the present invention, the above-mentioned battery module further includes: a first side plate and a second side plate, the first side plate and the second side plate are respectively provided at the same position along the length direction of the battery module. On the two side walls of the stack, and the positions of the first side plate and the second side plate corresponding to the first groove and the second groove are inwardly convex to form a first convex portion and a first convex portion, respectively. Two protruding parts, the first protruding part is fitted into the first groove, the first protruding part is provided with a first connecting hole matching the first threaded hole, and the second protruding part Fitted in the second groove, the second protrusion is provided with a second connection hole matching the second threaded hole, the first side plate and the second side plate correspond to the The positions of the first through hole and the second through hole respectively form a first opening and a second opening; an isolation plate, the isolation plate is arranged on the upper end and the upper end of the stack along the length direction of the battery module. a lower end; a first connecting piece, the first connecting piece passing through the first connecting hole and matching with the first threaded hole; a second connecting piece, the second connecting piece passing through the second connecting hole and The second threaded holes are matched. Thereby, quick assembly of the side plates can be achieved, and at the same time, the reliability of the battery module can be improved.

In some embodiments of the present invention, the first side plate and/or the second side plate are provided with concave-convex reinforcing ribs. Therefore, the expansion force of the cells in the module can be effectively resisted.

In some embodiments of the present invention, a buffer plate is provided between the first side plate and the stack body and/or between the second side plate and the stack body. Thereby, it can play the role of protecting the battery cells.

In some embodiments of the present invention, between two adjacent battery cells, between the stack and the buffer plate, and between the buffer plate and the first side wall and the second side, respectively Structural glue is provided between the boards. Thereby, the reliability of the battery module can be improved.

In some embodiments of the present invention, the thickness of the structural adhesive is 0.05-0.2 mm. Thereby, the stability of the battery cell installation can be improved.

In yet another aspect of the present invention, the present invention provides a battery module. According to an embodiment of the present invention, the battery module includes:

a plurality of the above battery modules;

a first baffle and a second baffle, the first baffle and the second baffle are arranged opposite and spaced apart, and the plurality of battery modules are provided on the first baffle and the second baffle in between, a third opening and a fourth opening are respectively provided on the first baffle and the second baffle at the positions corresponding to the first opening and the second opening;

a third connecting piece, the third connecting piece passes through the third opening, the first opening and the first through hole;

A fourth connecting piece passes through the fourth opening, the second opening and the second through hole.

According to the battery module of the embodiment of the present invention, the third opening and the fourth opening are respectively provided on the first baffle and the second baffle at the positions corresponding to the first opening and the second opening on the battery module, Then a third connecting piece is arranged to pass through the third opening, the first opening and the first through hole, and a fourth connecting piece is arranged to pass through the fourth opening, the second opening and the second through hole To achieve the above-mentioned fixing of the plurality of battery modules, compared with the prior art in which a peripheral power connector needs to be provided between two adjacent battery modules for power connection, that is, multiple battery modules need to be connected by a plurality of power connectors. There is no need to set a power connector between two adjacent battery modules in the battery module of the application, but only the third connector and the fourth connector can be used to realize the connection of multiple battery modules, which not only reduces the use of connectors , and reduces the cost and weight of the battery module, saves the installation space, and at the same time does not need to consider the connection stability and reliability of the power connector, reduces the internal resistance of the connection, thereby reducing the internal consumption of the battery module, thereby making it possible to install the battery Modular cars have excellent mileage.

In a third aspect of the present invention, the present invention proposes an automobile. According to an embodiment of the present invention, the automobile has the above-mentioned battery module. As a result, the car has excellent mileage.

Additional aspects and advantages of the present invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or may be learned by practice of the invention.

Description of drawings

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

1 is a schematic structural diagram of a cell in a battery module according to an embodiment of the present invention;

2 is a schematic structural diagram of a stack in a battery module according to an embodiment of the present invention;

FIG. 3 is a partial structural schematic diagram of a battery module according to an embodiment of the present invention;

4 is a schematic structural diagram of a stack in a battery module according to yet another embodiment of the present invention;

FIG. 5 is a partial structural schematic diagram of a battery module according to still another embodiment of the present invention;

6 is a schematic structural diagram of a battery module according to yet another embodiment of the present invention;

7 is a schematic structural diagram of a first tab protection shell in a battery module according to an embodiment of the present invention;

8 is a schematic structural diagram of a battery module according to yet another embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a battery module according to an embodiment of the present invention.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Back, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated device or Elements must have a particular orientation, be constructed and operate in a particular orientation and are therefore not to be construed as limitations of the invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may be in direct contact between the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In a first aspect of the present invention, the present invention provides a battery module. According to an embodiment of the present invention, referring to FIGS. 1-8 , the battery module 100 includes a plurality of stacked bodies 1 , a first tab protection case 2 and a second tab protection case 3 .

Wherein, the stacked body 1 includes a plurality of stacked battery cells 10 , preferably the plurality of battery cells 10 are laminated by bonding with a structural adhesive (not shown). Referring to FIG. 1 , the positive terminal end of the battery cell 10 forms a positive electrode tab 101 , and the negative terminal end of the battery cell 10 forms a negative electrode tab 102 , and with reference to FIG. 2 , the positive electrode tabs of the plurality of battery cells 10 in the same stack 1 The ends of 101 are laminated and welded to form the positive tab area 11, and the ends of the negative tabs 102 of the plurality of cells 10 in the same stack 1 are laminated and welded to form the negative tab area 11. Referring to FIG. 2, two adjacent stacks 1 The positive electrode tab region 11 of one stack 1 is welded with the negative electrode tab region 12 of the other stack 1 to form a cascade welding region 13 . Therefore, compared with the existing battery module in which the cells in the same stack are connected in parallel by copper bars and the two adjacent stacks are connected in series by copper bars, the battery module of the present application eliminates the need for parallel connection of cells. And the connecting accessory copper bars of the stacked body in series, thereby reducing the cost and weight of the module and improving the space utilization. Specifically, the ends of the positive electrode tabs 101 and the negative electrode tabs 102 of the plurality of cells 10 of the same stack 1 are stacked and welded, and the positive electrode tab region 11 of one stack 1 of the two adjacent stacks 1 is connected to the other. The manner of lamination welding of the negative electrode tab regions 12 of the stacked body 1 may be laser welding or ultrasonic welding.

Further, the positive electrode tabs 101 of the plurality of cells 10 in the same stack 1 are bent according to the structure shown in FIG. 2 , and the ends of the bent positive electrode tabs 101 are stacked to form the positive electrode tab area 11 . The negative electrode tabs 102 of the plurality of cells 10 in the body 1 are also bent according to the structure shown in FIG. 2 , so that the ends of the bent negative electrode tabs 102 are stacked to form the negative electrode tab area 11 . Referring to FIG. 4 , the positive electrode tabs 101 A first structure hole 1011 is provided on the top, a second structure hole 1021 is provided on the negative electrode tab 102, a first through channel 103 formed by a plurality of first structure holes 1011 is provided in the positive electrode tab area 11, and a negative electrode tab area 12 is provided with a first through channel 103. There are second through-channels 104 formed by a plurality of second structural holes 102 , and referring to FIG. 5 , in the cascade welding area 13 , the first through-channels 103 on one of the adjacent two stacked bodies 1 are connected to the other. An auxiliary connecting channel 105 is formed through the second through channel 104 on one stacked body 1 , and an auxiliary connecting member (not shown) is provided in the auxiliary connecting channel 105 . Specifically, by setting the first structural hole 1011 on the positive electrode tab 101 and setting the second structural hole 1021 on the negative electrode tab 102 , the ends of the positive electrode tabs 101 of the plurality of cells 10 are arranged in the same stack 1 . When stacking and welding with the negative electrode tab 102, a plurality of first structural holes 1011 are overlapped to form a first through channel 103, and a plurality of second structural holes 1011 are overlapped to form a second through channel 104, which is beneficial to the positive electrode tab 101 and the negative electrode The rapid positioning of the tabs 102 when they are stacked, and at the same time, when the positive tab region 11 of one stack 1 and the negative tab region 12 of the other stack 1 are stacked and welded to form a cascade welding region 13 in two adjacent stacks 1 . The first through channel 103 and the second through channel 104 overlap to form an auxiliary connection channel 105 , so as to facilitate the rapid positioning of the adjacent two stacked bodies 1 when forming the cascading welding area 13 , and the auxiliary connecting channel 105 in the cascading welding area 13 The provision of auxiliary connectors in the middle can improve the reliable connection of two adjacent stacked bodies 1 . It should be noted that those skilled in the art can select the specific type of the auxiliary connector according to actual needs, as long as the reliable connection between the two adjacent stacked bodies 1 can be achieved, for example, the auxiliary connector can be a riveting piece or a bolt, etc. .

Referring to FIG. 6 , the first tab protection shell 2 is clamped with the upper end and the lower end of the cascade welding area 13 respectively, that is, two first tab protection shells 2 are arranged at the cascade welding area 13, and the two first tab protection The shell 2 is clamped to the cascading tab area 13 from the upper end and the lower end of the battery module 100 respectively, and referring to FIG. 7 , the first tab protection shell 2 is provided with a first through hole 141 and a first groove 142, A groove 142 is provided with a first threaded hole 1421. Referring to FIG. 6, the second tab protection shell 3 is snapped with the positive tab area 11 or the negative tab area 12 of the stack 1 at the end, and the second The tab protection shell 3 is provided with a second through hole 151 and a second groove 152 , and the second groove 152 is provided with a second threaded hole 1521 . It should be noted that those skilled in the art can select the number of the first through holes 141 , the first grooves 142 , the second through holes 151 and the second grooves 152 according to actual needs. Preferably, the first tab protection The shell 2 is provided with a first through hole 141 and a first groove 142, the second tab protection shell 3 is provided with two second through holes 151 and two second grooves 152, and two second through holes 151 are symmetrically arranged, and the two second grooves 152 are also symmetrically arranged. Meanwhile, the first grooves 142 and the second grooves 152 are both circular grooves, which serve as a guide for the subsequent installation of the side plate and realize rapid assembly. Specifically, the first tab protective shell 2 and the second tab protective shell 3 are both insulating and flame-retardant plastics, such as PP, APS, PC, PA, and PA66.

Further, referring to FIG. 8 , the above-mentioned battery module further includes a first side plate 16 , a second side plate 17 , an isolation plate 18 , a first connecting member (not shown) and a second connecting member (not shown).

8 , the first side plate 16 and the second side plate 17 are respectively disposed on the two side walls of the stack 1 along the length direction of the battery module 100 , and the first side plate 16 and the second side plate 17 correspond to The positions of the first groove 142 and the second groove 152 are inwardly convex to form the first convex portion 162 and the second convex portion 172 respectively, that is, the positions on the first side plate 16 and the second side plate 17 corresponding to the first groove 142 A first convex portion 162 is formed on both, and a second convex portion 172 is formed on the first side plate 16 and the second side plate 17 corresponding to the second groove 152 , and the first convex portion 162 is fitted in the first groove 142 , the first protruding portion 162 is provided with a first connecting hole 1621 matching the first threaded hole 1421, the second protruding portion 172 is fitted into the second groove 152, and the second protruding portion 172 is provided with a second The screw holes 1521 are matched with the second connection holes 1721, so that when the first side plate 16 and the second side plate 17 are arranged on the two side walls of the stack body 1, only the first convex portion 162 needs to be matched with the first groove 142. And the second convex portion 172 cooperates with the second groove 152 to realize the rapid assembly of the first side plate 16 and the second side plate 17 , and the first side plate 16 and the second side plate 17 correspond to the first through holes 141 . The first opening 161 and the second opening 171 are respectively formed at the positions of the first and second through holes 151 , that is, the first openings 161 are formed at the positions corresponding to the first through holes 141 on the first side plate 16 and the second side plate 17 . , a second opening 171 is formed on the first side plate 16 and the second side plate 17 at positions corresponding to the second through holes 151 .

Referring to FIG. 8 , the isolation plates 18 are disposed on the upper and lower ends of the stack 1 along the length direction of the battery module 100 , the first connecting member passes through the first connecting hole 1621 to match the first threaded hole 1421 , and the second connecting member passes through the first connecting member 1621 . The two connecting holes 1721 are matched with the second threaded holes 1521 , so as to realize reliable installation of the first side plate 16 and the second side plate 17 . Preferably, concave-convex reinforcing ribs (not shown) are provided on the first side plate 16 and/or the second side plate 17, so that the expansion force of the cells in the module can be effectively resisted, and the first connecting member and the second connecting member Both are bolts. Specifically, the first side plate 16 and the second side plate 17 are made of metal or plastic, the metal is such as aluminum, copper, iron and its alloy materials, the metal can be formed by stamping, and the plastic is a thermosetting plastic, such as SMC, which has Higher strength, thermoset materials can be injection molded using molds.

Further, referring to FIG. 8 , a buffer plate 19 is provided between the first side plate 16 and the stack body 1 and/or between the second side plate 17 and the stack body 1 , which is used to provide fixed electrical power during the initial assembly of the stack body 1 . The pre-tightening force of the core 10 and the absorption of the expansion force of the battery core 10 at the end of use. It should be noted that those skilled in the art can select the material of the buffer plate 21 according to actual needs, for example, it can be an insulating and flame-retardant plastic, such as PP, APS, PC, PA, PA66 and other materials. At the same time, structural adhesives are provided between the stack 1 and the buffer plate 21 and between the buffer plate 21 and the first side wall 16 and the second side plate 17 respectively, so as to improve the reliability of the battery module.

According to the battery module of the embodiment of the present invention, a stack is formed by laminating a plurality of cells through structural glue, and the positive electrode tab ends of the cells in the same stack are stacked and welded to form a positive electrode tab region. The negative electrode tab ends of the cell are stacked and welded to form a negative electrode tab area, and the positive electrode tab area of one stack and the negative electrode tab area of the other stack in two adjacent stacks are welded to form a cascade welding area. The upper and lower ends of the cascade welding area are clamped with the first tab protection case, and the second tab protection case is clamped at the positive tab area or the negative electrode tab area of the stack located at the end. The first tab protection case and The arrangement of the second tab protection shell can not only effectively protect the cascading welding area, the positive tabs and the negative tabs of the end stack, improve the stability of the battery module, but also facilitate the quick installation of the subsequent side plates. In some battery modules, the cells in the same stack are connected in parallel by copper bars, and the two adjacent stacks are connected in series by copper bars. The battery module of the present application omits the connection accessories for the parallel connection of the cells and the series connection of the stacks. Copper bars, thereby reducing the cost and weight of the module and improving space utilization.

In yet another aspect of the present invention, the present invention provides a battery module. According to an embodiment of the present invention, referring to FIG. 9 , the battery module includes: a battery module 100 , a first baffle 200 , a second baffle 300 , a third connector 400 and a fourth connector 500 .

Referring to FIG. 9 , the battery module includes a plurality of the above-mentioned battery modules 100 omitting the connection accessory copper bars of the parallel connection of the cells and the serial connection of the stacked body. The plurality of battery modules 100 are arranged in sequence, and the plurality of battery modules 100 The first openings 161 of the battery modules 100 pass through, and the second openings 171 of the plurality of battery modules 100 pass through.

Referring to FIG. 9 , the first baffle 200 and the second baffle 300 are arranged opposite and spaced apart, and a plurality of battery modules 100 are disposed between the first baffle 200 and the second baffle 300 , the first baffle 200 and the second baffle The positions corresponding to the first opening 161 and the second opening 171 on the plate 300 are respectively provided with a third opening 201 and a fourth opening 301, that is, the first baffle 200 and the second baffle 300 correspond to the first opening The positions of 161 are provided with third openings 201 , and the positions of the first baffle 200 and the second baffle 300 corresponding to the second openings 171 are both provided with fourth openings 301 .

The third connecting member 400 passes through the third opening 201 , the first opening 161 and the first through hole 141 , and the fourth connecting member 500 passes through the fourth opening 301 , the second opening 171 and the second through hole 151 , so that the fixing of the plurality of battery modules 100 can be realized by using the third connector 400 and the fourth connector 500 . Preferably, both the third connecting member 400 and the fourth connecting member 500 include bolts 51 and nuts 52, so that the first baffle 200 is close to the first side plates 16 of the plurality of battery modules 100, and the second baffle 300 is close to the plurality of batteries Taking the second side plate 17 of the module 100 as an example, the bolts 51 pass through the third opening 201 on the first baffle plate 200 , the first opening 161 on the first side plate 16 , and the first tab protection shell 2 in sequence. The first through hole 141, the first opening 161 on the second side plate 17 and the third opening 201 on the second baffle 300, and the nut 52 is provided on the second baffle 300 away from the first baffle 200 one side and is locked with the bolt 51; the bolt 51 passes through the fourth opening 301 on the first baffle plate 200, the second opening 171 on the first side plate 16, and the second tab protection shell 3. The second through hole 151 , the second opening 171 on the second side plate 17 and the fourth opening 301 on the second baffle 300 , and the nut 52 is provided on the second baffle 300 away from the first baffle 200 . One side is locked with the bolt 51 .

Compared with the prior art, a peripheral power connector needs to be set between two adjacent battery modules for power connection, that is, multiple battery modules need to be connected by multiple power connectors. There is no need to set a power connector between the two battery modules, but only the third connector and the fourth connector can be used to realize the connection of multiple battery modules, which not only reduces the use of connectors, but also reduces the cost of battery modules. The cost and weight save the installation space, and at the same time do not need to consider the connection stability and reliability of the power connector, reduce the internal resistance of the connection, thereby reducing the internal consumption of the battery module, so that the car with the battery module installed has excellent continuity. time mileage. It should be noted that the features and advantages described above for the battery module are also applicable to the battery module, which will not be repeated here.

In a third aspect of the present invention, the present invention proposes an automobile. According to an embodiment of the present invention, the automobile has the above-mentioned battery module. Preferably, the vehicle is a new energy vehicle. As a result, the car has excellent mileage. It should be noted that the features and advantages described above for the battery module are also applicable to the vehicle, and will not be repeated here.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

Although the embodiments of the present invention have been shown and described above, it should be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present invention. Embodiments are subject to variations, modifications, substitutions and variations.

Claims (10)

1. A battery module, characterized in that, comprising: A plurality of stacked bodies, the stacked body includes a plurality of stacked battery cells, a structural adhesive is arranged between two adjacent battery cells, and the positive electrode tab ends of the plurality of battery cells are stacked and welded to form a positive electrode In the tab area, the negative electrode tab ends of a plurality of the battery cells are stacked and welded to form a negative electrode tab area, and the positive electrode tab area of one of the two adjacent stacks and the other one The negative electrode tab area is laminated and welded to form a cascade welding area; a first tab protection shell, the first tab protection shell is respectively clamped with the upper end and the lower end of the cascade welding area, and the first tab protection shell is provided with a first through hole and a first concave a groove, wherein a first threaded hole is arranged in the first groove; A second tab protective shell, the second tab protective shell is snap-connected to the positive tab region or the negative tab region of the stack located at the end, and the second tab protective shell A second through hole and a second groove are arranged thereon, and a second threaded hole is arranged in the second groove. 2 . The battery module according to claim 1 , wherein the positive electrode tab is provided with a first structural hole, the negative electrode tab is provided with a second structural hole, and the positive electrode tab area is provided with a second structural hole. 3 . A plurality of first through channels formed by the first structure holes, and a plurality of second through channels formed by the second structure holes are provided in the negative electrode tab region. 3 . The battery module according to claim 2 , wherein, in the cascade welding area, the first through channel and the second through channel pass through to form an auxiliary connection channel, and an auxiliary connection channel is provided in the auxiliary connection channel. 4 . There are auxiliary connectors. 4. The battery module of claim 1, further comprising: A first side plate and a second side plate, the first side plate and the second side plate are respectively provided on the two side walls of the stack body along the length direction of the battery module, and the first side plate Positions corresponding to the first groove and the second groove on the plate and the second side plate are respectively inwardly convex to form a first convex portion and a second convex portion, and the first convex portion is embedded in the In the first groove, the first convex portion is provided with a first connecting hole matching the first threaded hole, the second convex portion is fitted in the second groove, the second The convex part is provided with a second connection hole matching the second threaded hole, and the positions of the first side plate and the second side plate corresponding to the first through hole and the second through hole are respectively forming a first opening and a second opening; an isolation plate, the isolation plate is arranged on the upper end and the lower end of the stack body along the length direction of the battery module; a first connecting piece, which passes through the first connecting hole and is matched with the first threaded hole; The second connecting piece passes through the second connecting hole and is matched with the second threaded hole. 5 . The battery module according to claim 4 , wherein the first side plate and/or the second side plate is provided with a concave-convex reinforcing rib. 6 . 6 . The battery module according to claim 1 or 5 , wherein a buffer is provided between the first side plate and the stack body and/or between the second side plate and the stack body. 7 . plate. 7 . The battery module according to claim 6 , wherein an arrangement is provided between the stack body and the buffer plate, and between the buffer plate and the first side wall and the second side plate, respectively. 8 . There is structural glue. 8. The battery module according to claim 1 or 7, wherein the thickness of the structural adhesive is 0.05-0.2 mm. 9. A battery module, characterized in that, comprising: a plurality of the battery modules of any one of claims 1-8; a first baffle and a second baffle, the first baffle and the second baffle are arranged opposite and spaced apart, and the plurality of battery modules are provided on the first baffle and the second baffle in between, a third opening and a fourth opening are respectively provided on the first baffle and the second baffle at the positions corresponding to the first opening and the second opening; a third connecting piece, the third connecting piece passes through the third opening, the first opening and the first through hole; A fourth connecting piece passes through the fourth opening, the second opening and the second through hole. 10 . An automobile, characterized in that, the automobile has the battery module of claim 9 .

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