CN211980748U

CN211980748U - Battery module and have its battery module and car

Info

Publication number: CN211980748U
Application number: CN202020714580.1U
Authority: CN
Inventors: 杨重科; 冯帅; 赵亮; 李成亮; 翁志福
Original assignee: Kunshan Bao Innovative Energy Technology Co Ltd
Current assignee: Kunshan Bao Innovative Energy Technology Co Ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-11-20
Anticipated expiration: 2030-04-30

Abstract

The utility model discloses a battery module and have its battery module and car, battery module includes: the stacking body comprises a plurality of stacked electric cores, a structure adhesive is arranged between every two adjacent electric cores, the end parts of the positive pole lugs of the electric cores are welded in a stacking mode to form a positive pole lug area, the end parts of the negative pole lugs of the electric cores are welded in a stacking mode to form a negative pole lug area, and the positive pole lug area of one stacking body in the two adjacent stacking bodies and the negative pole lug area of the other stacking body are welded in a stacking mode to form a cascading welding area; the first lug protective shell is clamped with the upper end and the lower end of the cascade welding area respectively, a first through hole and a first groove are formed in the first lug protective shell, and a first threaded hole is formed in the first groove; the second pole lug protective housing is clamped with the positive pole lug area or the negative pole lug area of the stacked body located at the end part, a second through hole and a second groove are formed in the second pole lug protective housing, and a second threaded hole is formed in the second groove.

Description

Battery module and have its battery module and car

Technical Field

The utility model belongs to the battery field, concretely relates to battery module and have its battery module and car.

Background

With the continuous popularization of new energy automobiles, the use requirement of power batteries in the new energy automobiles becomes higher and higher. Particularly, the requirement of the user on the continuous mileage of the new energy automobile is continuously improved. The common new energy automobile, as a power battery pack of the new energy automobile, is more than 1 meter in both the length direction and the width direction; in the current market, the length of the battery modules is generally about 0.3 m, so at least 3 or even more battery modules need to be arranged in the power battery pack.

Set up a plurality of battery module, all need add fixed knot to every battery module and construct, simultaneously, need carry out power connection through the power connecting piece of peripheral hardware between two adjacent battery modules. The battery module has more mounting structures, so that not only is the cost increased, but also the overall weight is increased; simultaneously, in single module volume, mounting structure has taken more inner space, causes power battery module, and battery package whole capacity reduces, and battery module sets up more in the battery package, and the space is extravagant just more. In addition, because a plurality of external power connecting pieces are needed to be arranged for power connection, the internal resistance and the cost are increased, and the internal consumption and the cost of the power battery pack in use are improved.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, an object of the utility model is to provide a battery module and have its battery module and car, this battery module has saved the parallelly connected and stack's of electric core connection annex copper bar of establishing ties to reduce the cost and the weight of module, improved space utilization.

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

the stacking body comprises a plurality of stacked electric cores, structural glue is arranged between every two adjacent electric cores, positive pole lug end portions of the electric cores are welded in a stacking mode to form positive pole lug areas, negative pole lug end portions of the electric cores are welded in a stacking mode to form negative pole lug areas, and the positive pole lug areas of one stacking body and the negative pole lug areas of the other stacking body in two adjacent stacking bodies are welded in a stacking mode to form a cascading welding area;

the first tab protective shell is clamped with the upper end and the lower end of the cascade welding area respectively, a first through hole and a first groove are formed in the first tab protective shell, and a first threaded hole is formed in the first groove;

the second utmost point ear protective housing, the second utmost point ear protective housing with be located the tip the pile body the anodal ear district or negative pole ear district joint, and be equipped with second through-hole and second recess on the second utmost point ear protective housing, be equipped with the second screw hole in the second recess.

According to the battery module of the embodiment of the utility model, form the stack body through laminating a plurality of electric cores through the structure glue, and the anodal utmost point ear tip of electric core in same stack body welds and forms anodal utmost point ear district in the range upon range of, the negative pole utmost point ear tip of electric core welds and forms negative pole ear district in same stack body, and the anodal utmost point ear district of one stack body welds and forms cascade weld zone with the negative pole ear district of another stack body in two adjacent stack bodies, simultaneously joint first utmost point ear protective housing in cascade weld zone's upper and lower extreme, positive pole ear district or the negative pole ear district joint second utmost point ear protective housing in the stack body that lies in the tip, the setting of first utmost point ear protective housing and second utmost point ear protective housing not only can effectively protect cascade weld zone, the anodal utmost point ear and the negative pole ear of tip stack body, improve battery module's stability, do benefit, compare in current battery module in electric core adopt the copper bar to connect in parallel and two adjacent stacks adopt the copper bar to carry out the mode of establishing ties in the same stack, the battery module of this application has saved the parallelly connected connection annex copper bar that stacks the body series connection of electric core to reduce the cost and the weight of module, improved space utilization.

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

the utility model discloses an in some embodiments, be equipped with first structural hole on the anodal utmost point ear, be equipped with second structural hole on the negative pole utmost point ear, anodal utmost point ear district is equipped with a plurality ofly the first passageway that runs through that first structural hole formed, negative pole ear district is equipped with a plurality ofly the second that second structural hole formed runs through the passageway. Therefore, the rapid stacking installation of the battery cells is facilitated.

In some embodiments of the present invention, the first through channel and the second through channel are connected to form an auxiliary connection channel, and an auxiliary connection member is disposed in the auxiliary connection channel. This can improve the reliability of the internal connection of the battery module.

In some embodiments of the present invention, the battery module further includes: the first side plate and the second side plate are respectively arranged on two side walls of the stacked body along the length direction of the battery module, the positions, corresponding to the first groove and the second groove, of the first side plate and the second side plate are respectively inwards protruded to form a first convex part and a second convex part, the first convex part is embedded in the first groove, a first connecting hole matched with the first threaded hole is formed in the first convex part, the second convex part is embedded in the second groove, a second connecting hole matched with the second threaded hole is formed in the second convex part, and a first opening hole and a second opening hole are respectively formed in the positions, corresponding to the first through hole and the second through hole, of the first side plate and the second side plate; separators provided at upper and lower ends of the stacked body in a length direction of the battery module; the first connecting piece penetrates through the first connecting hole to be matched with the first threaded hole; and the second connecting piece penetrates through the second connecting hole to be matched with the second threaded hole. From this, can realize the rapid Assembly of curb plate, improve battery module's reliability simultaneously.

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 battery cell 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 and/or between the second side plate and the stack. Therefore, the battery cell protection device can play a role in protecting the battery cell.

The utility model discloses an in some embodiments, adjacent two between the electricity core stack with between the buffer board respectively with first lateral wall with be equipped with the structure between the second lateral wall and glue. This can improve the reliability of the battery module.

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

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

a plurality of the above battery modules;

the battery module comprises a first baffle and a second baffle, wherein the first baffle and the second baffle are arranged oppositely and at intervals, the plurality of battery modules are arranged between the first baffle and the second baffle, and third holes and fourth holes are respectively formed in the positions, corresponding to the first holes and the second holes, of the first baffle and the second baffle;

a third connector passing through the third opening, the first opening, and the first through hole;

a fourth connector passing 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 positions of the first baffle and the second baffle corresponding to the first opening and the second opening of the battery module are respectively provided with the third opening and the fourth opening, and then the third connecting member is arranged to pass through the third opening, the first opening and the first through hole, and the fourth connecting member is arranged to pass through the fourth opening, the second opening and the second through hole to fix the plurality of battery modules, so that the power connection is performed by using a plurality of power connecting members, compared with the prior art in which an external power connecting member is required to be arranged between two adjacent battery modules, i.e. a plurality of battery modules are required to be connected by using a plurality of power connecting members, in the battery module of the present invention, a power connecting member is not required to be arranged between two adjacent battery modules, but only the third connecting member and the fourth connecting member are used to realize the connection of the plurality of battery modules, thereby not, and the cost and the weight of the battery module are reduced, the installation space is saved, the connection stability and the reliability of the power connecting piece do not need to be considered, and the connection internal resistance is reduced, so that the internal consumption of the battery module is reduced, and the automobile provided with the battery module has excellent continuous mileage.

In a third aspect of the present invention, the present invention provides a vehicle. According to the utility model discloses an embodiment, the car has foretell battery module. Thus, the automobile has excellent mileage.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

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

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

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

fig. 3 is a schematic view of a partial structure of a battery module according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a stack in a battery module according to still another embodiment of the present invention;

fig. 5 is a partial structural view of a battery module according to still another embodiment of the present invention;

fig. 6 is a schematic structural view of a battery module according to still another embodiment of the present invention;

fig. 7 is a schematic structural view of a first tab protection housing in a battery module according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a battery module according to still another embodiment of the present invention;

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

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

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

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation 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 fig. 1 to 8, the battery module 100 includes a plurality of stacks 1, a first tab protective case 2, and a second tab protective case 3.

Wherein, stack 1 includes a plurality of electric cores 10 of range upon range of, preferably a plurality of electric cores 10 are laminated through structural adhesive (not shown) bonding. Referring to fig. 1, the positive electrode end of the battery cell 10 forms a positive electrode tab 101, the negative electrode end of the battery cell 10 forms a negative electrode tab 102, and referring to fig. 2, the positive electrode tab 101 ends of the plurality of battery cells 10 in the same stacked body 1 are welded in a stacked manner to form a positive electrode tab zone 11, the negative electrode tab 102 ends of the plurality of battery cells 10 in the same stacked body 1 are welded in a stacked manner to form a negative electrode tab zone 11, and referring to fig. 2, the positive electrode tab zone 11 of one stacked body 1 in two adjacent stacked bodies 1 is welded with the negative electrode tab zone 12 of the other stacked body 1 to form a cascade welding zone 13. From this, compare in current battery module in electric core adoption copper bar carry out parallelly connected and two adjacent stacks adopt the copper bar to carry out the mode of establishing ties in the same stack, the battery module of this application has saved the parallelly connected and stack series connection annex copper bar of electric core to reduce the cost and the weight of module, improved space utilization. Specifically, the end parts of the positive electrode tab 101 and the negative electrode tab 102 of the plurality of battery cells 10 of the same stack 1 are welded in a stacked manner, and the positive electrode tab region 11 of one stack 1 and the negative electrode tab region 12 of the other stack 1 in two adjacent stacks 1 are welded in a stacked manner by laser welding or ultrasonic welding.

Further, the positive electrode tabs 101 of the plurality of battery cells 10 in the same stack 1 are bent according to the structure shown in fig. 2, and the end portions of the bent positive electrode tabs 101 are stacked to form a positive electrode ear region 11, the negative electrode tabs 102 of the plurality of battery cells 10 in the same stack 1 are also bent according to the structure shown in fig. 2, and the end portions of the bent negative electrode tabs 102 are stacked to form a negative electrode ear region 11, referring to fig. 4, a first structure hole 1011 is provided on the positive electrode tab 101, a second structure hole 1021 is provided on the negative electrode tab 102, the positive electrode ear region 11 is provided with a first through channel 103 formed by a plurality of first structure holes 1011, the negative electrode ear region 12 is provided with a second through channel 104 formed by a plurality of second structure holes 102, and referring to fig. 5, in the cascade welding region 13, the first through channel 103 on one stack 1 of two adjacent stacks 1 is communicated with the second through channel 104 on the other stack 1 to form an auxiliary connecting channel 105, an auxiliary connection member (not shown) is provided in the auxiliary connection passage 105. Specifically, the first structure holes 1011 are formed in the positive electrode tab 101, the second structure holes 1021 are formed in the negative electrode tab 102, the first structure holes 1011 are overlapped to form the first through channel 103 when the end portions of the positive electrode tabs 101 and the negative electrode tabs 102 of the plurality of battery cells 10 are welded in a stacking manner in the same stack body 1, the second structure holes 1011 are overlapped to form the second through channel 104, so that the rapid positioning when the positive electrode tabs 101 and the negative electrode tabs 102 are stacked is facilitated, the first through channel 103 and the second through channel 104 are overlapped to form the auxiliary connecting channel 105 when the positive electrode tab area 11 of one stack body 1 and the negative electrode tab area 12 of the other stack body 1 are welded in a stacking manner to form the cascade welding region 13 in the two adjacent stack bodies 1, the rapid positioning when the two adjacent stack bodies 1 form the cascade welding region 13 is facilitated, and the auxiliary connecting piece is arranged in the auxiliary connecting channel 105 of the cascade 13, so that the reliable connection of the two adjacent stack bodies 1 can be improved . It should be noted that the specific type of the auxiliary connecting member can be selected by those skilled in the art according to actual needs, as long as reliable connection between two adjacent stacked bodies 1 can be achieved, and the auxiliary connecting member can be a rivet or a bolt, for example.

Referring to fig. 6, the first tab protection cases 2 are respectively connected to the upper end and the lower end of the cascade welding region 13 in a snap-fit manner, that is, two first tab protection cases 2 are disposed at the cascade welding region 13, the two first tab protection cases 2 are respectively connected to the cascade tab region 13 from the upper end and the lower end of the battery module 100 in a snap-fit manner, and referring to fig. 7, a first through hole 141 and a first groove 142 are disposed on the first tab protection case 2, a first screw hole 1421 is disposed in the first groove 142, referring to fig. 6, the second tab protection case 3 is connected to the positive tab region 11 or the negative tab region 12 of the stacked body 1 disposed at the end portion in a snap-fit manner, a second through hole 151 and a second groove 152 are disposed on the second tab protection case 3, and a second screw. It should be noted that, a person skilled in the art may 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, one first through hole 141 and one first groove 142 are provided on the first tab protection case 2, two second through holes 151 and two second grooves 152 are provided on the second tab protection case 3, the two second through holes 151 are symmetrically arranged, the two second grooves 152 are also symmetrically arranged, and the first grooves 142 and the second grooves 152 are both circular grooves, so as to guide the installation of subsequent side plates, thereby achieving rapid assembly. Specifically, the first tab protection housing 2 and the second tab protection housing 3 are both made of insulating and flame-retardant plastic, such as PP, APS, PC, PA66, and the like.

Further, referring to fig. 8, the battery module further includes a first side plate 16, a second side plate 17, a partition plate 18, a first connector (not shown), and a second connector (not shown).

Referring to fig. 8, the first side plate 16 and the second side plate 17 are respectively disposed on two side walls of the stack body 1 along the length direction of the battery module 100, and the first protrusion 162 and the second protrusion 172 are respectively formed on the first side plate 16 and the second side plate 17 at positions corresponding to the first groove 142 and the second groove 152, that is, the first protrusion 162 is formed on the first side plate 16 and the second side plate 17 at positions corresponding to the first groove 142, the second protrusion 172 is formed on the first side plate 16 and the second side plate 17 at positions corresponding to the second groove 152, the first protrusion 162 is fitted in the first groove 142, the first protrusion 162 is provided with a first connection hole 1621 matching with the first screw hole 1421, the second protrusion 172 is fitted in the second groove 152, and the second protrusion 172 is provided with a second connection hole 1721 matching with the second screw hole 1521, so that when the first side plate 16 and the second side plate 17 are disposed on two side walls of the stack body 1, the first side plate 162 is fitted in the first groove 142, and the second protrusion 172 is fitted in the second groove Two grooves 152 cooperate to realize the rapid assembly of first curb plate 16 and second curb plate 17, and the position that corresponds first through-hole 141 and second through-hole 151 on first curb plate 16 and the second curb plate 17 forms first trompil 161 and second trompil 171 respectively simultaneously, corresponds first through-hole 141's position on first curb plate 16 and the second curb plate 17 and all forms first trompil 161, corresponds second through-hole 151's position on first curb plate 16 and the second curb plate 17 and all forms second trompil 171.

Referring to fig. 8, separators 18 are provided at the upper and lower ends of the stack 1 in the lengthwise direction of the battery module 100, first connectors are coupled with the first screw holes 1421 through the first coupling holes 1621, and second connectors are coupled with the second screw holes 1521 through the second coupling holes 1721, thereby achieving reliable mounting of the first and

second side plates

16 and 17. Preferably, the first side plate 16 and/or the second side plate 17 are provided with concave-convex reinforcing ribs (not shown), so that the expansion force of the battery cells in the module can be effectively resisted, and the first connecting piece and the second connecting piece are both bolts. Specifically, the first side plate 16 and the second side plate 17 are made of metal or plastic, the metal is made of aluminum, copper, iron and alloy materials thereof, the metal can be formed by punching, the plastic is thermosetting plastic such as SMC, the plastic has high strength, and the thermosetting material can be formed by injection molding.

Further, referring to fig. 8, a buffer plate 19 is disposed between the first side plate 16 and the stacked body 1 and/or between the second side plate 17 and the stacked body 1, and is used for providing a pre-tightening force for fixing the battery cell 10 during initial assembly of the stacked body 1 and absorbing an expansion force of the battery cell 10 at an end stage of use. It should be noted that, a person skilled in the art can select the material of the buffer plate 21 according to actual needs, and for example, the material may be insulating and flame retardant plastic, such as PP, APS, PC, PA66, and the like. While structural adhesives are provided between the stack 1 and the buffer plate 21, and between the buffer plate 21 and the first and

second side walls

16 and 17, respectively, thereby improving the reliability of the battery module.

In another aspect of the present invention, the utility model provides a battery module. According to the utility model discloses an embodiment, referring to fig. 9, the battery module includes: the battery module 100, the first barrier 200, the second barrier 300, the third connection member 400, and the fourth connection member 500.

Referring to fig. 9, the battery module includes a plurality of battery modules 100, in which the connecting accessory copper bars of the battery cells connected in parallel and the stacked body connected in series are omitted, the plurality of battery modules 100 are sequentially arranged, the first openings 161 of the plurality of battery modules 100 are through, and the second openings 171 of the plurality of battery modules 100 are through.

Referring to fig. 9, the first barrier 200 and the second barrier 300 are disposed opposite to each other at intervals, the plurality of battery modules 100 are disposed between the first barrier 200 and the second barrier 300, the first barrier 200 and the second barrier 300 are respectively provided with a third opening 201 and a fourth opening 301 at positions corresponding to the first opening 161 and the second opening 171, that is, the first barrier 200 and the second barrier 300 are both provided with a third opening 201 at positions corresponding to the first opening 161, and the first barrier 200 and the second barrier 300 are both provided with a fourth opening 301 at positions corresponding to the second opening 171.

The third connector 400 passes through the third opening 201, the first opening 161 and the first through hole 141, and the fourth connector 500 passes through the fourth opening 301, the second opening 171 and the second through hole 151, so that the plurality of battery modules 100 can be fixed by using the third connector 400 and the fourth connector 500. Preferably, the third connector 400 and the fourth connector 500 each include a bolt 51 and a nut 52, taking the first baffle 200 close to the first side plate 16 of the plurality of battery modules 100 and the second baffle 300 close to the second side plate 17 of the plurality of battery modules 100 as an example, the bolt 51 sequentially passes through the third opening 201 on the first baffle 200, the first opening 161 on the first side plate 16, the first through hole 141 on the first tab protection housing 2, 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 disposed on a side of the second baffle 300 away from the first baffle 200 and is locked with the bolt 51 in a matching manner; the bolt 51 passes through the fourth hole 301 on the first baffle 200, the second hole 171 on the first side plate 16, the second through hole 151 on the second lug protective housing 3, the second hole 171 on the second side plate 17 and the fourth hole 301 on the second baffle 300, and the nut 52 is arranged on one side of the second baffle 300 far away from the first baffle 200 and is matched and locked with the bolt 51.

For need set up the power connecting piece of peripheral hardware and carry out the power connection between two adjacent battery modules among the prior art, a plurality of battery modules need adopt a plurality of power connecting pieces to connect promptly, need not set up the power connecting piece between two adjacent battery modules in the battery module of this application, but only adopt third connecting piece and fourth connecting piece can realize linking to each other of a plurality of battery modules, the connecting piece use has not only been reduced, and the cost and the weight of battery module have been reduced, installation space has been saved, need not to consider power connecting piece's connection stability and reliability simultaneously, the internal resistance of connection has been reduced, thereby reduce the internal consumption of battery module, and then make the car of installing this battery module have excellent continuous-time mileage. It should be noted that the features and advantages described above for the battery module are also applicable to the battery module, and are not described herein again.

In a third aspect of the present invention, the present invention provides a vehicle. According to the utility model discloses an embodiment, the car has foretell battery module. Preferably, the vehicle is a new energy vehicle. Thus, the automobile 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 are not described herein again.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer 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, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A battery module, comprising:

2. The battery module as claimed in claim 1, wherein the positive electrode tab is provided with a first structure hole, the negative electrode tab is provided with a second structure hole, the positive electrode tab area is provided with a plurality of first through channels formed by the first structure hole, and the negative electrode tab area is provided with a plurality of second through channels formed by the second structure hole.

3. The battery module according to claim 2, wherein an auxiliary connection passage is formed at the cascade welding region by the first through passage and the second through passage, and an auxiliary connection member is provided in the auxiliary connection passage.

4. The battery module of claim 1, further comprising:

the first side plate and the second side plate are respectively arranged on two side walls of the stacked body along the length direction of the battery module, the positions, corresponding to the first groove and the second groove, of the first side plate and the second side plate are respectively inwards protruded to form a first convex part and a second convex part, the first convex part is embedded in the first groove, a first connecting hole matched with the first threaded hole is formed in the first convex part, the second convex part is embedded in the second groove, a second connecting hole matched with the second threaded hole is formed in the second convex part, and a first opening hole and a second opening hole are respectively formed in the positions, corresponding to the first through hole and the second through hole, of the first side plate and the second side plate;

separators provided at upper and lower ends of the stacked body in a length direction of the battery module;

the first connecting piece penetrates through the first connecting hole to be matched with the first threaded hole;

and the second connecting piece penetrates through the second connecting hole to be 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. The battery module according to claim 4 or 5, characterized in that a buffer plate is provided between the first side plate and the stack and/or between the second side plate and the stack.

7. A battery module, comprising:

a plurality of the battery modules of any one of claims 1-6;

a third connector passing through the third opening, the first opening and the first through hole;

8. An automobile characterized by having the battery module according to claim 7.