CN216055069U - Battery connection row, battery module and consumer - Google Patents

Abstract

The utility model relates to the technical field of batteries, particularly, provide a battery run-on, battery module and consumer, this battery run-on includes body, connecting portion and mounting hole, and wherein the body is including relative first face and the second face that sets up, and connecting portion set up on first face, and the surface that first face was kept away from to connecting portion is the fitting surface, and the fitting surface is formed on connecting portion through stamping process, and the mounting hole sets up on connecting portion and the mounting hole is used for cooperating with the utmost point ear of electric core. The utility model provides a method for forming a matching surface through a stamping process to improve the flatness of the surface of the matching surface, thereby increasing the effective contact area of a battery core and a battery connecting bar, and reducing the contact resistance to achieve the effect of reducing the heat productivity.

Description

Battery connection row, battery module and consumer

Technical Field

The application generally relates to the technical field of batteries, and particularly provides a battery connecting bar, a battery module and electric equipment.

Background

The development of new energy technology, electric vehicles increasingly become the main development pillars of motor vehicles, the light weight and the rapid charging speed of a battery system become a main research direction, a connecting bar is used as a conductive part, and the success or failure of a set of battery pack is determined by the temperature change and the conductive capacity in the working process. The problem of large current temperature rise caused by light weight and quick charging is not fundamentally solved.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem that the temperature rise of the connecting bar contradicts with lightweight design demand in the prior art, the application provides a battery connecting bar, battery module and consumer.

In order to realize the purpose of the utility model, the following technical scheme is adopted in the application:

according to a first aspect of embodiments of the present application, there is provided a battery connection bank including:

the body comprises a first surface and a second surface which are oppositely arranged;

the connecting part is arranged on the first surface, the surface of the connecting part, which is far away from the first surface, is a matching surface, and the matching surface is formed on the connecting part through a stamping process; and

and the mounting hole is arranged on the connecting part and is used for being matched with the lug of the battery cell.

According to an embodiment of the present application, a distance between the mating surface and the first surface is H, a distance between the second surface and the first surface is T, and H/T satisfies: H/T is more than or equal to 1 and less than or equal to 5.

According to an embodiment of the application, wherein the edges of the mating surface are provided with rounded corners.

According to an embodiment of the present application, the diameter of the fitting surface is B, the diameter of the mounting hole is a, and B satisfies: b is more than or equal to A +10 mm.

According to an embodiment of the present application, wherein the mounting hole is provided in plurality.

According to an embodiment of the present application, the battery connecting row is an aluminum row or a copper row.

According to a second aspect of the embodiments of the present application, a battery module is provided, which includes a plurality of battery cells and the above battery connecting bar, wherein the mounting holes are provided in a plurality and are arranged in a one-to-one correspondence with the battery cells.

According to an embodiment of the application, wherein a tab is arranged on the battery cell, and the tab is in insertion fit with the mounting hole.

According to an embodiment of the application, wherein be provided with the screw thread on the utmost point ear, utmost point ear pass through the nut spacing set up in on the body.

According to a third aspect of the embodiments of the present application, there is provided an electric device including the above battery module.

According to the technical scheme, the battery connecting bar, the battery module and the electric equipment have the advantages and positive effects that: the application provides a battery connection row includes body, connecting portion and mounting hole, wherein the body is including relative first face and the second face that sets up, connecting portion set up in on the first face, connecting portion keep away from the surface of first face is the fitting surface, the fitting surface passes through stamping process and is formed in on the connecting portion, the mounting hole set up in on the connecting portion just the mounting hole is used for cooperating with utmost point ear. In summary, the utility model provides a method for forming a matching surface by a stamping process to improve the surface flatness of the matching surface, thereby increasing the effective contact area between a battery core and a battery connecting bar, and reducing the contact resistance to achieve the effect of reducing the heat productivity.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

Fig. 1 is a schematic view showing the overall structure of a battery connecting bank according to an exemplary embodiment.

Fig. 2 is a schematic diagram of a battery connector bank, according to an exemplary embodiment, primarily designed to embody mating surfaces.

Fig. 3 is a schematic view illustrating the overall structure of a battery module according to an exemplary embodiment.

Fig. 4 is a schematic structural diagram of a battery connecting bar, a battery module, and an electric device, which are mainly used for embodying a battery cell according to an exemplary embodiment.

Wherein the reference numerals are as follows:

1. a body; 2. a connecting portion; 3. mounting holes; 4. a first side; 5. a second face; 6. a mating surface; 7. an electric core; 8. a tab; 9. a core body; 10. a contact surface; 11. and a nut.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It is noted that in the description and claims of the present application and in the above-mentioned drawings, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Also, the terms "comprises," "comprising," and "having," as well as any variations thereof or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Referring to fig. 1 to 4, the disclosed embodiment provides a battery connection bank including a body 1, a connection part 2, and a mounting hole 3. Wherein the body 1 comprises a first face 4 and a second face 5 arranged oppositely. The connecting part 2 is arranged on the first surface 4, the surface of the connecting part 2, which is far away from the first surface 4, is a matching surface 6, and the matching surface 6 is formed on the connecting part 2 through a stamping process. The mounting hole 3 is arranged on the connecting portion 2, and the mounting hole 3 is used for being matched with a tab 8 of the battery cell 7. The utility model provides a method for forming a matching surface 6 through a stamping process so as to improve the surface flatness of the matching surface 6, thereby increasing the effective contact area of a battery core 7 and a battery connecting bar, reducing contact resistance and achieving the effect of reducing heat productivity.

Further, the first surface 4 and the second surface 5 are two opposite surfaces in the thickness direction of the body 1, and the connection portion 2 is provided on the first surface 4, and at the same time, the connection portion 2 may be provided on the second surface 5. When the connecting part 2 is arranged on the first surface 4, the mating surface 6 is a surface of the connecting part 2 far away from the first surface 4; when the connecting portion 2 is disposed on the second surface 5, the mating surface 6 is a surface of the connecting portion 2 away from the second surface 5. For convenience of description, in the embodiments of the present disclosure, the connection portion 2 is provided on the first surface 4 as an example.

Further, the mating surface 6 is formed on the connecting portion 2 by a stamping process. The matching surface 6 in the prior art is usually formed by die casting, however, the die casting process belongs to one of hot working, the metal of the raw material of the connecting part 2 flows in the die casting process, and the surface of the matching surface 6 is oxidized after the die casting process. Also, the mating surface 6 formed on the connection part 2 by the die casting process cannot ensure the roughness and flatness of the surface of the mating surface 6. Meanwhile, segregation, pores, shrinkage cavities, shrinkage porosity, inclusions, crack cold shut, grain unevenness, pitted surface, and the like may occur in the contact surface 10 formed after the die casting. However, in the embodiment of the present application, the press forming process is adopted to form the matching surface 6 on the connection portion 2, the press forming process belongs to one of cold processing, no metal flow exists in the press forming process, and the connection portion 2 is in a solid state, the matching surface 6 for contacting with the battery core 7 can well control the roughness and the flatness of the surface thereof, so as to ensure that after the matching surface 6 is connected with the battery core 7, the battery core 7 is in effective contact with the battery connecting bar, so that the contact effective area of the battery core 7 and the conductive connecting bar is optimized, and the contact resistance is reduced to achieve the purpose of reducing the heat productivity.

Further, the mounting hole 3 is disposed on the connecting portion 2, and the mounting hole 3 is used for being matched with a tab 8. Specifically, electric core 7 includes core 9, 9 length direction both sides of core all are provided with contact surface 10, contact surface 10 deviates from one side of core 9 is provided with utmost point ear 8, utmost point ear 8 is kept away from one side of core 9 is provided with the screw thread. In the actual use process, the mounting hole 3 of the battery connecting row is matched with the pole lug 8, and the matching surface 6 is attached to the contact surface 10 to realize connection.

Specifically, the mounting hole 3 may be a through hole or a blind hole. When the mounting hole 3 is a blind hole, in order to facilitate the matching of the mounting hole 3 and the tab 8, a thread groove matched with a thread on the tab 8 is arranged in the mounting hole 3; therefore, when the tab 8 is matched with the mounting hole 3, the tab 8 is inserted into the mounting hole 3, then the tab 8 or the rotating body 1 is rotated to enable the tab 8 or the mounting hole 3 to rotate relatively, and the thread of the tab 8 is matched with the thread groove in the mounting hole 3 to realize the connection between the mounting hole 3 and the tab 8.

Similarly, when the mounting hole 3 is a through hole, a thread groove matched with the thread on the tab 8 may be provided in the mounting hole 3 to realize the connection between the mounting hole 3 and the tab 8. Meanwhile, mounting hole 3 still can be for the smooth through-hole of inner wall, utmost point ear 8 inserts back in the mounting hole 3, utmost point ear 8 can run through to the other end of mounting hole 3 and outstanding mounting hole 3 setting from the one end of mounting hole 3, and technical staff can pass through nut 11 and the screw-thread fit on utmost point ear 8, and then with utmost point ear 8 spacing setting in mounting hole 3.

Optionally, when the mounting hole 3 is a through hole, the second surface 5 may further have a fitting groove formed thereon, and the fitting groove is formed on the body 1 so as to be recessed from the second surface 5 toward the first surface 4; under the condition that the nut 11 is screwed with the lug 8, the matching groove is used for matching with the nut 11 to provide a placing space for the nut 11, so that the overall structure of the battery connecting bar is more compact.

Optionally, the mounting hole 3 is provided in plurality. Usually, the battery connecting bar is required to be connected with a plurality of battery cells 7 when in use, so a plurality of mounting holes 3 are arranged, and each mounting hole 3 is arranged in one-to-one correspondence with the lug 8 of each battery cell 7, so that the reliability of the contact between the battery connecting bar and the battery cells 7 is improved.

Furthermore, the edge of the matching surface 6 is provided with a round angle, so that the smooth flowing of materials during molding processing can be ensured through the arrangement of the round angle, and the processing and manufacturing process is smoother. Alternatively, the round angle can be R3, and one-step forming can be ensured during machining and manufacturing.

Similarly, the joint 2 and the first surface 4 are also provided with rounded corners.

Further, the diameter of the matching surface 6 is B, the diameter of the mounting hole 3 is A, and B satisfies the following conditions: b is larger than or equal to A +10mm, so that the effective contact area of the matching surface 6 is ensured.

Further, the distance between the matching surface 6 and the first surface 4 is H, the distance between the second surface 5 and the first surface 4 is T, and H/T satisfies: H/T is more than or equal to 1 and less than or equal to 5. Through the ratio between the height of restriction connecting portion 2 and the 1 thickness of body, can ensure that connecting portion 2 can one shot forming, can save subsequent course of working, reduce the processing cost, can also effectively avoid influencing the plane degree of fitting surface 6 owing to process many times. The battery connecting bar provided by the application can be obtained through calculation, the effective conductive sectional area S1 of the battery connecting bar formed through a stamping process is A1/(3-3.5), and A1 is the total current which needs to be passed by the battery connecting bar. Whereas the effective conductive cross-sectional area S2 of the battery connection bank formed by the prior art, i.e. using the die-casting process, is a2/1, a2 is the total current that the battery connection bank needs to pass. Therefore, when the total current needed to pass through the two battery connecting bars is the same, the effective conductive sectional area of the battery connecting bar formed by the stamping process is smaller than that of the battery connecting bar formed by the die-casting process, and the material utilization rate can be greatly improved.

Further, the battery connecting row is an aluminum row or a copper row. In addition, in the actual use process, the material of the battery connecting bar can also be made of copper-aluminum alloy. Through the arrangement of the materials, the battery connecting bar can keep good conductive performance and can control the manufacturing cost. The battery connecting bar in the embodiment of the disclosure is made of aluminum bars, and is made of aluminum materials with excellent forming performance and electric conduction capacity, the resistivity of the materials is less than 0.045 omega, m, the first forming tensile coefficient is greater than 0.5, the specific heat capacity is 0.897J/(g DEG C), and the mass ratio of the internal resistance of the battery connecting bar to the mass of the battery connecting bar is less than 10m omega/kg, so that the current carrying capacity of the battery connecting bar can be ensured by smaller mass of the battery connecting bar.

Further, the distance between the first surface 4 and the second surface 5 is 3mm, the width of the battery connecting row is 80mm, and the current-carrying sectional area is 240mm in the embodiment of the disclosure². 7 test points are arranged on the battery connecting row in the set form, and a temperature instrument is used for monitoring data to obtain the following test data:

therefore, through tests, when the current of 720A is passed, the temperature rises to 15K through 5 charge-discharge cycles, and the charge-discharge requirements of the battery system 3C are met.

Referring to fig. 1 to 4, an embodiment of the present disclosure further provides a battery module, which includes the above battery connection bar and a plurality of battery cells 7, where the battery connection bar is provided with a plurality of mounting holes 3 that are arranged in a one-to-one correspondence with the battery cells 7. The technical features of the battery connecting row in the battery module can be referred to the foregoing description, and are not repeated herein. The battery module disclosed in the embodiment of the present application includes the battery connecting bar provided in the above embodiment, and therefore the battery module having the battery connecting bar also has all the above technical effects, which are not described in detail herein. Other constructions and operations of the battery module will be known to those skilled in the art and will not be described in detail herein.

Further, a tab 8 is arranged on the battery cell 7, and the tab 8 is in insertion fit with the mounting hole 3. Specifically, both sides of the battery cell 7 in the length direction are provided with contact surfaces 10, and the tab 8 is disposed on one side of the contact surface 10 departing from the battery cell 7. Under the circumstances of battery core 7 and the cooperation of battery run-on, the fitting surface 6 of battery run-on with contact surface 10 laminates each other, utmost point ear 8 runs through mounting hole 3 in the thickness direction of body 1 and sets up.

Further, a thread is arranged on the tab 8, and the tab 8 is arranged on the body 1 in a limiting manner through a nut 11. Under the condition that the lug 8 is in plug fit with the mounting hole 3, a technician mutually fits with threads on the lug 8 through the nut 11, and then the lug 8 can be limited and fixed on the body 1 by clockwise rotating the nut 11; when the battery cell 7 needs to be detached from the body 1, a technician can rotate the nut 11 counterclockwise, and the tab 8 can be taken out of the mounting hole 3.

Referring to fig. 1 to 4, an embodiment of the present disclosure also provides an electric device, including the above-mentioned battery module. Specifically, the electric equipment includes, but is not limited to, a charging car and the like.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications and changes to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A battery connector row, comprising:

the body (1) comprises a first surface (4) and a second surface (5) which are oppositely arranged;

the connecting part (2) is arranged on the first surface (4), the surface, far away from the first surface (4), of the connecting part (2) is a matching surface (6), and the matching surface (6) is formed on the connecting part (2) through a stamping process; and

and the mounting hole (3) is arranged on the connecting part (2) and is used for being matched with a lug (8) of the battery cell (7).

2. The battery row of claim 1, wherein the distance between the mating surface (6) and the first face (4) is H, the distance between the second face (5) and the first face (4) is T, H/T being such that: H/T is more than or equal to 1 and less than or equal to 5.

3. The battery row of claim 1, wherein the edges of the mating surface (6) are provided with rounded corners.

4. The battery row of claim 1, wherein the mating surface (6) has a diameter B and the mounting hole (3) has a diameter a, said diameter B satisfying: b is more than or equal to A +10 mm.

5. The battery row according to claim 1, wherein the mounting hole (3) is provided in plurality.

6. The battery connector bar of claim 1, wherein the battery connector bar is an aluminum bar or a copper bar.

7. A battery module, characterized in that, including a plurality of battery cells (7) and the battery connection row of any claim 1-6, the mounting hole (3) is provided in a plurality and is arranged corresponding to each battery cell (7).

8. The battery module according to claim 7, wherein the battery core (7) is provided with a tab (8), and the tab (8) is in plug-in fit with the mounting hole (3).

9. The battery module according to claim 8, wherein the tab (8) is provided with threads, and the tab (8) is limited and arranged on the body (1) through a nut (11).

10. An electric device characterized by comprising the battery module according to any one of claims 7 to 9.

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