CN212342772U - Battery cell series group and have its battery module and car - Google Patents

Abstract

The utility model discloses an electricity core series group and have its battery module and car, electricity core series group includes: the battery comprises a plurality of battery cores and is characterized in that the battery cores are adjacent to each other, one of the battery cores is a positive electrode lug of the battery core and the other is a negative electrode lug of the battery core, a cascading welding area is formed by stacking and welding, the positive electrode lug of the battery core and/or the negative electrode lug of the battery core and the cascading welding area are provided with a switching acquisition piece, and the switching acquisition piece faces the upper end of the battery core series connection group and extends out of the upper end of the switching acquisition piece. From this, can realize the quick installation of gathering the board on this electricity core series connection group, do not increase connecting pieces such as screw moreover, reduce the cost and the weight of battery module to can realize the quick collection of battery module voltage and temperature, thereby can improve the production efficiency of battery module and reduce its equipment cost.

Description

Battery cell series group and have its battery module and car

Technical Field

The utility model belongs to the battery field, concretely relates to electricity core series group 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. The rapid assembly can reduce the cost and improve the production efficiency.

The traditional module acquisition circuit adopts a flexible circuit board or a wire harness for acquisition at the top of a module, but the assembly efficiency of the wire harness is low, the connecting end adopts a screw or ultrasonic welding, but the screw connection occupies space, and after the ultrasonic welding, the wire harness fixing structure is complex, parts need to be added, and the system cost is increased; the flexible circuit board requires enough space for welding the nickel sheet at the acquisition end with the part needing to be acquired, and particularly in a single-string module, the flexible circuit board often has insufficient space and cannot be acquired.

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 an electricity core series connection group and have its battery module and car, can realize the quick installation of gathering the board on this electricity core series connection group, do not increase connecting pieces such as screw moreover, reduced the cost and the weight of battery module to can realize the quick collection of battery module voltage and temperature, thereby can improve the production efficiency of battery module and reduce its assembly cost.

In one aspect of the present invention, the utility model provides an electricity core series connection group. According to the utility model discloses an embodiment, electric core series connection group includes: the battery comprises a plurality of battery cores and is characterized in that the battery cores are adjacent to each other, one of the battery cores is a positive electrode lug of the battery core and the other is a negative electrode lug of the battery core, a cascading welding area is formed by stacking and welding, the positive electrode lug of the battery core and/or the negative electrode lug of the battery core and the cascading welding area are provided with a switching acquisition piece, and the switching acquisition piece faces the upper end of the battery core series connection group and extends out of the upper end of the switching acquisition piece. From this, through the anodal utmost point ear and/or the negative pole utmost point ear of the electric core of group tip and cascade weld zone setting switching collection piece in electric core series connection, can realize gathering the quick installation of board, do not increase connecting pieces such as screw moreover, reduced the cost and the weight of battery module to can realize the quick collection of battery module voltage and temperature, thereby can improve the production efficiency of battery module and reduce its equipment cost.

In some embodiments of the present invention, the transfer collection sheet is formed with a chamfer angle.

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 battery cell series groups are stacked;

the collecting plate is arranged at the upper ends of the plurality of battery cell serial groups and is provided with collecting connecting holes corresponding to the positions of the switching collecting pieces, the switching collecting pieces on the plurality of battery cell serial groups are matched with the collecting connecting holes, and the collecting plate is provided with a first low-voltage connector.

According to the battery module of the embodiment of the utility model, the cell series connection group of the switching acquisition sheet is arranged by adopting the positive electrode tab and/or the negative electrode tab of the cell of the end part and the cascade welding zone, then the acquisition plate is arranged at the upper end of the cell series connection group of the plurality of stacked cells, the acquisition plate is provided with the acquisition connecting hole corresponding to the position of the switching acquisition sheet, the switching acquisition sheet on the cell series connection group is matched with the acquisition connecting hole, namely, the rapid installation of the acquisition plate can be realized only by the matching of the acquisition connecting hole on the acquisition plate and the switching acquisition sheet on each cell series connection group, thereby realizing the voltage and temperature acquisition of the battery module, and the acquisition plate is provided with the low-voltage connector which can transmit the acquired information to the battery management system, the acquisition scheme is rapid, the space is saved, and the battery module is particularly suitable for only series-connected cells, or the battery module that electricity core thickness is thin, realize the fast assembly of battery module, compare in adopting flexible circuit board or pencil collection mode among the prior art, the collection board installation is quick among the battery module of this application, and do not increase connecting pieces such as screw, the cost and the weight of battery module have been reduced, and can realize the quick collection of battery module voltage and temperature, thereby can improve the production efficiency of battery module and reduce its assembly cost, and then make the car of installing this battery module have excellent continuous time mileage.

In addition, according to the utility model discloses battery module of above-mentioned embodiment can also have following additional technical characterstic:

in some embodiments of the present invention, the collection connection hole is matched with a chamfer formed on the upper end of the transfer collection sheet and welded. From this, can realize gathering quick installation of board.

In some embodiments of the present invention, the cell series group corresponds to the first low voltage connector one to one. Therefore, the voltage and the temperature of each battery cell series group in the battery module can be rapidly acquired.

The utility model discloses an in some embodiments, adjacent two be equipped with the structure between the electricity core series connection group and glue. This can improve the reliability of the battery module.

In some embodiments of the present invention, the battery module further includes: the battery protection shell comprises a first lug protection shell, wherein the first lug protection shell is connected with a plurality of batteries in series, the upper end and the lower end of the cascade welding area are clamped, a first through hole and a first groove are formed in the first lug protection shell, and a first threaded hole is formed in the first groove. Therefore, on one hand, the cascade welding area is protected, and on the other hand, the quick positioning and assembly of the subsequent side plate are facilitated.

In some embodiments of the present invention, the battery module further includes: the second utmost point ear protective housing, the second utmost point ear protective housing respectively with be located the battery module tip the anodal utmost point ear of electricity core series group with negative pole utmost point ear 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. Therefore, on one hand, the positive electrode lug and the negative electrode lug at the end part of the battery module are protected, and on the other hand, the subsequent side plates are convenient to quickly position and assemble.

In some embodiments of the present invention, the battery module further includes: the battery module comprises a plurality of battery cell serial groups, and is characterized by comprising a first side plate and a second side plate, wherein the first side plate and the second side plate are respectively arranged on two side walls of the plurality of battery cell serial groups along the length direction of the battery module, the positions of the first side plate and the second side plate corresponding to the first groove and the second groove 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, a first opening and a second opening are respectively formed in the positions of the first side plate and the second side plate corresponding to the first through hole and the second through hole, and the positions of the first side plate and the second side plate corresponding to the welding zone serial connection position of the battery cell serial groups and corresponding to the serial connection position of the end of the battery module Welding connection holes are formed in the positions of a positive electrode lug and a negative electrode lug of the battery pack, a flexible circuit board is arranged on one side of one of the first side plate and the second side plate, which is close to the battery cell serial group, and corresponds to the welding connection holes, the flexible circuit board is provided with a second low-voltage connector and a thermistor, and the flexible circuit board is connected with the cascade welding area and the positive electrode lug and the negative electrode lug of the battery cell serial group, which are positioned at the end part of the battery module, through connection sheets; the first connecting piece penetrates through the first connecting hole to be matched with the first threaded hole; the second connecting piece penetrates through the second connecting hole to be matched with the second threaded hole; a third connecting member passing through the first opening and the first through hole; a fourth connector passing through the second opening and the second through hole.

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 cells in the battery cell serial group can be effectively resisted.

In some embodiments of the present invention, a buffer plate is disposed between the first side plate and the cell serial group and/or between the second side plate and the cell serial group. Therefore, the battery cell protection device can play a role in protecting the battery cell.

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 view of a battery module according to an embodiment of the present invention;

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

fig. 3 is a schematic structural diagram of a cascade welding region in a cell series group in a battery module according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a cell series group in a battery module according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a part of a cascade welding zone in a cell series group in a battery module according to still another embodiment of the present invention;

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

fig. 7 is a schematic view of a partial structure of a battery module according to still another 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 first tab protection housing on a battery module according to yet another embodiment of the present invention;

fig. 10 is a schematic structural view of a second tab protection housing on a battery module according to another embodiment of the present invention;

fig. 11 is a schematic structural view of a battery module according to still another embodiment of the present invention;

fig. 12 is a schematic view illustrating a partial structure of a first side plate in a battery module according to another 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 an electrical core series connection set. In accordance with an embodiment of the present invention, referring to fig. 1-4, the cell series group 100 includes a plurality of cells 10. Referring to fig. 2, a positive electrode tab 101 is formed at the positive electrode end of the battery cell 10, a negative electrode tab 102 is formed at the negative electrode end of the battery cell 10, the positive electrode tab 101 is aluminum or aluminum alloy, the negative electrode tab 102 is copper or copper alloy, and the housing of the battery cell 10 is aluminum plastic. And referring to fig. 3, a positive tab 101 of one cell 10 and a negative tab 102 of another cell 10 in two adjacent cells 10 are welded in a stacked manner to form a cascade welding zone 11, and referring to fig. 1, the positive tab 101 and/or the negative tab 102 of the cell 10 and the cascade welding zone 11 at the end portion are provided with a switching acquisition sheet 12, the switching acquisition sheet 12 extends towards the upper end of the cell series group 100, and the upper end of the switching acquisition sheet 12 extends out of the cell series group 100, and preferably referring to fig. 4, the upper end of the switching acquisition sheet 12 forms a chamfer 121, thereby facilitating the installation of the acquisition plate. Specifically, laser welding or ultrasonic welding is adopted in a manner that the positive electrode tab 101 of one battery cell 10 and the negative electrode tab 102 of the other battery cell 10 in two adjacent battery cells 10 are welded in a stacking manner to form the cascade welding area 13, the switching acquisition piece 12 is synchronously welded in the cascade welding area 11, the switching acquisition piece 12 is welded at the positive electrode tab 101 and/or the negative electrode tab 102 of the battery cell 10 at the end portion, and the switching acquisition piece 12 is made of copper, nickel or other materials. The inventor finds that the rapid installation of the collecting plate can be realized by arranging the switching collecting piece on the positive pole lug and/or the negative pole lug of the battery cell at the end part of the battery cell series group and the cascading welding area, connecting pieces such as screws are not added, the cost and the weight of the battery module are reduced, the rapid collection of the voltage and the temperature of the battery module can be realized, the production efficiency of the battery module can be improved, and the assembly cost of the battery module is reduced.

In a second aspect of the present invention, the utility model provides a battery module. According to an embodiment of the present invention, referring to fig. 5 to 12, the battery module includes the above-mentioned cell series group 100 and the collecting plate 200.

Referring to fig. 5, the battery module includes a plurality of the above-mentioned cell serial groups 100, and the plurality of cell serial groups 100 are stacked, and a structural adhesive (not shown) is disposed between two adjacent cell serial groups 100.

Referring to fig. 6 and 7, the collecting plate 200 is disposed at the upper end of the plurality of cell serial groups 100, and collecting connection holes 201 are disposed on the collecting plate 200 at positions corresponding to the switching collecting pieces 12, the switching collecting pieces 12 on the plurality of cell serial groups 100 are matched with the collecting connection holes 201, and the collecting plate 200 is provided with a first low voltage connector 21. Specifically, the collection connecting hole 201 is matched with the chamfer angle 121 on the switching collection sheet 12 and is welded by tin soldering, so that the installation efficiency of the collection plate 200 is improved, and the welding efficiency is improved. Preferably, the cell series groups 100 correspond to the first low-voltage connectors 21 one by one, that is, the number of the cell series groups 100 is the same as that of the first low-voltage connectors 21, and the first low-voltage connectors 21 are disposed at positions on the collecting plate 200 corresponding to each cell series group 100, and more preferably, each first connector 21 is disposed at an end of the collecting plate 200.

According to the battery module of the embodiment of the utility model, the switching acquisition sheet is arranged on the positive electrode tab and/or the negative electrode tab of the battery cell at the end part of each battery cell serial group and the cascading welding zone, then the acquisition plate is arranged at the upper end of the battery cell serial groups arranged in a plurality of layers, the acquisition plate is provided with the acquisition connecting hole corresponding to the position of the switching acquisition sheet, the switching acquisition sheets on the battery cell serial groups are matched with the acquisition connecting hole, namely, the acquisition plate can be rapidly installed only by matching the acquisition connecting hole on the acquisition plate with the switching acquisition sheet on each battery cell serial group, thereby realizing the voltage and temperature acquisition of the battery module, and the acquisition plate is provided with the low-voltage connector which can transmit the acquired information to the battery management system, the acquisition scheme is rapid, the space is saved, and the battery module is particularly suitable for only serially connecting the battery cells, or the battery module that electricity core thickness is thin, realize the fast assembly of battery module, compare in adopting flexible circuit board or pencil collection mode among the prior art, the collection board installation is quick among the battery module of this application, and do not increase connecting pieces such as screw, the cost and the weight of battery module have been reduced, and can realize the quick collection of battery module voltage and temperature, thereby can improve the production efficiency of battery module and reduce its assembly cost, and then make the car of installing this battery module have excellent continuous time mileage.

Further, referring to fig. 8, the battery module further includes a first tab protection case 300 and a second tab protection case 400, wherein the first tab protection case 300 is respectively connected to the upper end and the lower end of the cascade welding region 11 of the plurality of cell series groups 100 in a snap-fit manner, that is, two first tab protection cases 300 are disposed at the cascade welding region 11 of the plurality of cell series groups 100, the two first tab protection cases 300 are respectively connected to the cascade tab regions 11 of the plurality of cell series groups 100 in a snap-fit manner from the upper end and the lower end of the battery module, and referring to fig. 9, a first through hole 301 and a first groove 302 are disposed on the first tab protection case 300, a first threaded hole 3021 is disposed in the first groove 302, referring to fig. 8, the second tab protection case 400 is respectively connected to the tab positive electrode 101 and the negative electrode tab 102 of the cell series group 100 at the end of the battery module, and referring to fig. 10, a second through hole 401 and a second groove 402 are disposed on, a second threaded hole 4021 is provided in the second groove 402. It should be noted that, a person skilled in the art may select the number of the first through holes 301, the first grooves 302, the second through holes 401 and the second grooves 402 according to actual needs, preferably, one first through hole 301 and one first groove 302 are provided on the first tab protection case 300, two second through holes 401 and two second grooves 402 are provided on the second tab protection case 400, the two second through holes 401 are symmetrically arranged, the two second grooves 402 are also symmetrically arranged, and the first grooves 302 and the second grooves 402 are both circular grooves, so as to guide the installation of subsequent side plates, thereby achieving rapid assembly. Specifically, the first tab protection case 300 and the second tab protection case 400 are made of insulating and flame-retardant plastic, such as PP, APS, PC, PA, and PA 66.

Further, referring to fig. 11, the battery module further includes a first side plate 500, a second side plate 600, a first connector (not shown) and a second connector (not shown), a third connector 700, and a fourth connector 800.

Referring to fig. 11, the first side plate 500 and the second side plate 600 are respectively disposed on two side walls of the multiple cell serial groups 100 along the length direction of the battery module, and positions of the first side plate 500 and the second side plate 600 corresponding to the first groove 302 and the second groove 402 are respectively formed by inward protruding first convex portions 501 and second convex portions 601, that is, positions of the first side plate 500 and the second side plate 600 corresponding to the first groove 302 are both formed by first convex portions 501, positions of the first side plate 500 and the second side plate 600 corresponding to the second groove 402 are both formed by second convex portions 601, the first convex portions 501 are embedded in the first groove 302, the first convex portions 501 are provided with first connection holes 5011 matched with the first threaded holes 3021, the second convex portions 601 are embedded in the second groove 402, the second convex portions 601 are provided with second connection holes 6011 matched with the second threaded holes 4021, so that when the first side plate 500 and the second side plate 600 are disposed on two side walls of the multiple cell serial groups 100, the first side plate 500 and the second side plate 600 are only to cooperate with the first groove 302 and the first convex portions 501 and the second groove The second convex portion 601 is matched with the second groove 402 to achieve rapid assembly of the first side plate 500 and the second side plate 600, meanwhile, a first open hole 502 and a second open hole 602 are formed in positions, corresponding to the first through hole 301 and the second through hole 401, of the first side plate 500 and the second side plate 600 respectively, namely the first open hole 502 is formed in positions, corresponding to the first through hole 301, of the first side plate 500 and the second side plate 600, and the second open hole 602 is formed in positions, corresponding to the second through hole 401, of the first side plate 500 and the second side plate 600.

Referring to fig. 11, the first side plate 500 and the second side plate 600 are provided with welding connection holes 503 at positions corresponding to the cascade welding zone 11 of the cell series group 100 and positions corresponding to the positive electrode tab 101 and the negative electrode tab 102 of the cell series group 100 at the end of the battery module, and for the welding connection holes 503 at the corresponding cascade welding zone 11, which is used for welding a positive electrode tab 101 and a negative electrode tab 102 of two adjacent battery cells 10 in the battery cell serial group 100 to form a cascade welding area 11 and a welding hole when a welding device passes through the cascade welding area 11, and welding connection holes 503 are provided at positions corresponding to the positive electrode tab 101 and the negative electrode tab 102 of the cell series group 100 at the end of the battery module, the welding device is used for welding holes when the welding device passes through when the positive pole lug 101 and the negative pole lug 102 of the battery cell series group 100 positioned at the end part of the battery module are used for welding the switching acquisition sheet 12. And referring to fig. 11 and 12, a flexible circuit board 50 is provided on one of the first side plate 500 and the second side plate 600 at a position corresponding to the welding connection hole 503 on a side close to the cell series group 100, the flexible circuit board 50 is provided with a second low voltage connector 51 and a thermistor 52, the flexible circuit board 50 is connected to the cascade land 11, the positive electrode tab 101 and the negative electrode tab 102 of the cell series group 100 at the end of the battery module by a connection sheet 53, that is, the flexible circuit board 50 corresponding to the cascade land 11 is connected to the cascade land 11 by the connection sheet 53, and for the tabs 101 and 102 of the cell series group 100 at the end of the battery module, the flexible circuit board 50 corresponding to the positive electrode tab 101 at the end of the battery module is connected to the positive electrode tab 101 by the connection sheet 53, the flexible circuit board 50 corresponding to the negative electrode tab 102 at the end of the battery module, the battery is connected with a negative electrode tab 102 through a connecting sheet 53, preferably, the connecting sheet 53 is a nickel connecting piece, the thermistor 52 is used for acquiring the temperature condition of the battery cell series group 100 through the connecting sheet 53, the thermistor 52 transmits a temperature signal to the second low-voltage connector 51, and the second low-voltage connector 51 feeds back the temperature signal to the battery management system, so that the acquired information can be acquired quickly. For example, referring to fig. 11, the flexible circuit board 50 is disposed on the first side plate 500 at a position corresponding to the cascade welding region 11 on a side close to the cell serial group 100.

Referring to fig. 11, a first connector is matched with the first screw hole 3021 through the first connection hole 5011, and a second connector is matched with the second screw hole 4021 through the second connection hole 6011, thereby achieving reliable installation of the first and second side plates 500 and 600. Preferably, concave-convex reinforcing ribs (not shown) are arranged on the first side plate 500 and/or the second side plate 600, 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 500 and the second side plate 600 are made of metal or plastic, the metal is made of aluminum, copper, iron or alloy thereof, the metal can be formed by stamping, the plastic is thermosetting plastic such as SMC, the plastic has high strength, and the thermosetting material can be formed by injection molding.

The third connecting member 700 passes through the first opening 502 and the first through hole 301, and the fourth connecting member 800 passes through the second opening 602 and the second through hole 401, so that the plurality of cell series groups 100 can be reliably fixed by using the third connecting member 700 and the fourth connecting member 800. Preferably, the third connector 700 and the fourth connector 800 each include a bolt and a nut, the bolt on the third connector 700 sequentially passes through the first opening 502 on the first side plate 500, the first through hole 301 on the first tab protection case 300, and the first opening 502 on the second side plate 600, and the nut is disposed on one side of the second side plate 600 far from the first side plate 500 and is locked by being matched with the bolt; similarly, the bolt on the fourth connector 800 passes through the second opening 602 on the first side plate 500, the second through hole 401 on the second tab protection case 400, and the second opening on the second side plate 600, and the nut is disposed on the side of the second side plate 600 far from the first side plate 500 and is locked by the bolt.

Further, a buffer plate (not shown) is disposed between the first side plate 500 and the cell serial group 100 and/or between the second side plate 600 and the cell serial group 100, and is used for providing a pre-tightening force for fixing the cell 10 during initial assembly of the cell serial group and absorbing an expansion force of the cell 10 at an end stage of use. It should be noted that, those skilled in the art can select the material of the buffer board according to actual needs, for example, the material may be insulating and flame retardant plastic, such as PP, APS, PC, PA66, etc. Meanwhile, structural adhesive is arranged between the battery cell serial group 100 and the buffer plate and between the buffer plate and the first side plate 500 and the second side plate 600 respectively, so that the reliability of the battery module is improved.

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 (9)

1. A battery cell series group, comprising: the battery comprises a plurality of battery cores and is characterized in that the battery cores are adjacent to each other, one of the battery cores is a positive electrode lug of the battery core and the other is a negative electrode lug of the battery core, a cascading welding area is formed by stacking and welding, the positive electrode lug of the battery core and/or the negative electrode lug of the battery core and the cascading welding area are provided with a switching acquisition piece, and the switching acquisition piece faces the upper end of the battery core series connection group and extends out of the upper end of the switching acquisition piece.

2. The battery cell series group of claim 1, wherein the transition collection sheet is formed with a chamfer on an upper end thereof.

3. A battery module, comprising:

a plurality of the cell series groups of claim 1 or 2, the plurality of cell series groups being stacked;

the collecting board is arranged at the upper ends of the plurality of battery cell serial groups and corresponds to the position of the switching collecting piece on the collecting board, collecting connecting holes are formed in the positions of the switching collecting piece, the switching collecting piece on the plurality of battery cell serial groups is matched with the collecting connecting holes, first low-voltage connectors are arranged on the collecting board, and each first low-voltage connector is arranged at the end of the collecting board.

4. The battery module as set forth in claim 3, wherein the collecting connection hole is matched with and welded to a chamfer formed at the transfer collecting chip.

5. The battery module according to claim 3 or 4, wherein the cell series groups correspond to the first low-voltage connectors one to one.

6. The battery module according to claim 3, further comprising: the battery cell protection shell comprises a first tab protection shell, wherein the first tab protection shell is connected with the upper end and the lower end of the cascade welding zone in a series mode through a plurality of battery cells respectively, a first through hole and a first groove are formed in the first tab protection shell, and a first threaded hole is formed in the first groove.

7. The battery module according to claim 6, further comprising: the second utmost point ear protective housing, the second utmost point ear protective housing respectively with be located the battery module tip the anodal utmost point ear of electricity core series group with negative pole utmost point ear 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.

8. The battery module according to claim 7, further comprising:

the first side plate and the second side plate are respectively arranged on two side walls of the battery cell serial group along the length direction of the battery module, the positions of the first side plate corresponding to the first groove and the second groove are respectively inwards protruded to form a first convex part and a second convex part, the positions of the second side plate corresponding to the first groove and the second groove 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, the first convex part is provided with a first connecting hole matched with the first threaded hole, the second convex part is embedded in the second groove, the second convex part is provided with a second connecting hole matched with the second threaded hole, and the positions of the first side plate corresponding to the first through hole and the second through hole are respectively provided with a first opening hole and a second opening hole, a first hole and a second hole are formed in the second side plate corresponding to the first through hole and the second through hole respectively, welding connection holes are formed in the first side plate and the second side plate corresponding to a cascading welding area of the battery cell serial group and corresponding to a positive electrode lug and a negative electrode lug of the battery cell serial group located at the end of the battery module, a flexible circuit board is arranged on one side of one of the first side plate and the second side plate close to the battery cell serial group and corresponding to the welding connection holes, the flexible circuit board is provided with a second low-voltage connector and a thermistor, and the flexible circuit board is connected with the cascading welding area, the positive electrode lug and the negative electrode lug of the battery cell serial group located at the end of the battery module through connecting sheets;

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

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

a third connecting member passing through the first opening and the first through hole;

a fourth connector passing through the second opening and the second through hole.

9. An automobile having the battery module according to any one of claims 3 to 8.

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