CN211829003U

CN211829003U - Battery module and have its battery module and car

Info

Publication number: CN211829003U
Application number: CN202020716249.3U
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: 2020-10-30
Anticipated expiration: 2030-04-30

Abstract

The utility model discloses a battery module and have its battery module and car, wherein battery module includes: the stacking body comprises a plurality of stacked cells, positive pole lug end portions of the cells are welded in a stacking mode to form positive pole lug areas, negative pole lug end portions of the cells are welded in a stacking mode to form negative pole lug areas, and the positive pole lug area of one stacking body and the negative pole lug area of the other stacking body in two adjacent stacking bodies are welded in a stacking mode to form a cascading welding area; the first side plate and the second side plate are respectively provided on both side walls of the stacked body in the length direction of the battery module. Therefore, the battery module saves connecting accessory copper bars for connecting the battery cells in parallel and connecting the stacked bodies in series, so that the cost and the weight of the module are reduced, and the space utilization rate is improved.

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 stacked body comprises a plurality of stacked cells, positive pole lug end portions of the cells are welded in a stacked mode to form positive pole lug areas, negative pole lug end portions of the cells are welded in a stacked mode to form negative pole lug areas, and the positive pole lug areas of one stacked body and the negative pole lug areas of the other stacked body in two adjacent stacked bodies are welded in a stacked mode to form a cascading welding area;

and first and second side plates provided on both side walls of the stacked body in a length direction of the battery module, respectively.

According to the battery module of the embodiment of the present invention, by stacking a plurality of battery cells to form a stacked body, and the end parts of the positive pole lugs of the cells in the same stacked body are welded in a stacked manner to form a positive pole lug area, the end parts of the negative pole lugs of the cells in the same stacked body are welded in a stacked manner to form a negative pole lug area, and the anode lug area of one of the two adjacent stacks is welded with the cathode lug area of the other stack to form a cascade welding area, set up first curb plate and second curb plate simultaneously on battery module's lateral wall, compare in current battery module in the same pile body electric core adopt the copper bar to connect in parallel and two adjacent pile bodies adopt the copper bar to carry out the mode of establishing ties, the battery module of this application has saved the parallelly connected and stack body series connection annex copper bar 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 structure hole on the anodal utmost point ear, be equipped with second structure hole on the negative pole utmost point ear. Therefore, the rapid stacking installation of the battery cells is facilitated.

In some embodiments of the present invention, the positive electrode tab area is provided with a plurality of first through channels formed by the first structural holes, and the negative electrode tab area is provided with a plurality of second through channels formed by the second structural holes. 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 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, battery module includes a plurality of foretell battery modules. From this, this battery module has saved the battery module of parallelly connected and the connection annex copper bar of pile body series connection of electric core through adopting the aforesaid, has reduced the cost and the weight of battery module, has saved installation space, has reduced the internal resistance of connection simultaneously to reduce the internal consumption of battery module, and then make the car of installing this battery module have excellent continuous time 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.

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 5, the battery module 100 includes a plurality of stacked bodies 1, a first side plate 2, and a second side plate 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 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 stacked body 1 are bent according to the structure shown in fig. 3, and the end parts of the bent positive electrode tabs 101 are laminated to form positive electrode lug areas 11, the negative electrode tabs 102 of a plurality of battery cells 10 in the same stacked body 1 are also bent according to the structure shown in figure 3, so that the end parts of the bent negative electrode tabs 102 are laminated to form negative electrode lug areas 11, referring to fig. 4, the positive electrode tab 101 is provided with a first structure hole 1011, the negative electrode tab 102 is provided with a second structure hole 1021, the positive electrode tab region 11 is provided with a first through channel 103 formed by a plurality of the first structure holes 1011, the negative electrode tab region 12 is provided with a second through channel 104 formed by a plurality of the second structure holes 102, and referring to fig. 5, in the cascade land 13, the first through via 103 and the second through via 104 are penetrated to form an auxiliary connection via 105, and an auxiliary connection member (not shown) is provided in the auxiliary connection via 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.

Wherein, referring to fig. 6, first and second side plates 2 and 3 are respectively provided on both side walls of the stack 1 in the length direction of the battery module 100, thereby fixing the plurality of stacks 1. Note that, the side walls of the stacked body 1 are defined as surfaces corresponding to the upper and lower surfaces of the battery cells 10 forming the stacked body 1. Preferably, the first side plate 2 and/or the second side plate 3 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. Specifically, the first side plate 2 and the second side plate 3 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 (sheet molding compound), the plastic has high strength, and the thermosetting material can be formed by injection molding through a mold.

Further, a buffer plate (not shown) is arranged between the first side plate 2 and the stacked body 1 and/or between the second side plate 2 and the stacked body 1, and is used for providing pre-tightening force for fixing the battery cell 10 during initial assembly of the stacked body 1 and absorbing expansion force of the battery cell 10 at the end 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 stacked body 1 and the buffer plate and between the buffer plate and the first side wall 2 and the second side wall 3 respectively, so that the reliability of the battery module is improved. Preferably, be equipped with between above-mentioned a plurality of electric cores 10, between stack 1 and the buffer board, the buffer board respectively with first lateral wall 2 and second lateral plate 3 between the structure glue thickness be 0.05 ~ 0.2 mm. This can improve 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, battery module includes a plurality of foretell battery modules. From this, this battery module has saved the battery module of parallelly connected and the connection annex copper bar of pile body series connection of electric core through adopting the aforesaid, has reduced the cost and the weight of battery module, has saved installation space, has reduced the internal resistance of connection simultaneously to 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 of claim 1, wherein the positive tab has a first structural hole and the negative tab has a second structural hole.

3. The battery module of claim 2, wherein the positive electrode tab region is provided with a plurality of first through-passages formed by the first structural holes, and the negative electrode tab region is provided with a plurality of second through-passages formed by the second structural holes.

4. The battery module according to claim 1, 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.

5. The battery module according to claim 1, 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 1, wherein a buffer plate is provided between the first side plate and the stack and/or between the second side plate and the stack.

7. The battery module of claim 6, wherein structural adhesive is disposed between two adjacent cells, between the stacked body and the buffer plate, and between the buffer plate and the first side wall and the second side wall, respectively.

8. The battery module according to claim 7, wherein the structural adhesive has a thickness of 0.05 to 0.2 mm.

9. A battery module comprising a plurality of battery modules according to any one of claims 1 to 8.

10. An automobile characterized by having the battery module according to claim 9.