CN217114719U

CN217114719U - Power battery module connecting device assembly, power battery pack and vehicle

Info

Publication number: CN217114719U
Application number: CN202220571894.XU
Authority: CN
Inventors: 王帅; 李�昊; 代康伟; 杨壮
Original assignee: Beijing Electric Vehicle Co Ltd
Current assignee: Beijing Electric Vehicle Co Ltd
Priority date: 2022-03-16
Filing date: 2022-03-16
Publication date: 2022-08-02
Anticipated expiration: 2032-03-16

Abstract

The utility model provides a power battery module connecting device assembly, power battery package and vehicle relates to the vehicle manufacturing technology field. Power battery module connecting device assembly includes: the battery module comprises an electric connecting device and a battery module which is matched and connected with the electric connecting device; the electric connecting device is provided with a first extension part and a second extension part; the first extending part is inserted into the battery module, and the second extending part is clamped and fixed to the outer portion of the battery module. The technical scheme of the utility model can greatly promote power battery package production speed, reduce safe risk, improve the reuse rate of part.

Description

Power battery module connecting device assembly, power battery pack and vehicle

Technical Field

The utility model relates to a vehicle manufacturing technical field, in particular to power battery module connecting device assembly, power battery package and vehicle.

Background

The common new energy automobile power battery pack comprises a plurality of battery modules, current-carrying conductors are needed to be used for electric connection among the battery modules, main materials of the current-carrying conductors are usually copper and aluminum, the surfaces of the main materials are subjected to anti-corrosion treatment by using nickel, chromium and the like, the current-carrying conductors are formed by general processes of stamping, bending, welding and the like, and the outer parts of the current-carrying conductors are coated by insulating materials to a certain extent.

The current-carrying conductor is usually in a fixed connection relationship with the battery module through a bolt connection manner, so that electric energy between the battery module and the battery module in the power battery pack can be transmitted. The mounting of current-carrying conductors by means of screws in production and maintenance involves problems: the mounting times supported by the bolt and the nut are limited, and the reliability is influenced by mounting and dismounting for a plurality of times; the hidden danger of electric shock accidents caused by the falling of metal parts exists in the installation process; the detection mode of bolt installation in place is usually torque detection, and due to the problems of torque detection, operation angle, part quality and the like, the condition that the actual installation contact is poor when the torque reaches the standard exists, and the risk of accelerated aging and even thermal runaway of a module exists; when the protective cover plate is installed or maintained, the operation steps of taking a part, taking down the protective cover plate, placing a part, fastening, marking, installing the protective cover plate and the like are required, so that the time consumption is long; in the installation and maintenance process, the battery module connecting part is a charged body which can be touched by fingers and tools, so that the hidden danger of electric shock accidents exists; because the restriction of mounting process between current-carrying conductor and the module, current-carrying conductor often needs great power battery package inner space outside the module of occuping during the design, is unfavorable for the volume utilization ratio of battery package, and volume energy density is low, and probably leads to the current-carrying conductor that lies in outside the battery module to contact with the battery package box occasionally when the collision accident takes place, has the secondary accident hidden danger of taking place.

In summary, in the prior art, the connection of the battery modules in the power battery system is realized by using a conductive bar for bolt connection, or cable quick-insertion type terminal connection, wherein the cable connection cost is high, the performance is poor, the conductive bar is connected with the production by using a bolt, the efficiency is low, the conditions of misassembly, improper assembly and the like can be caused, the product safety is affected, and the parts are worn and are not beneficial to reuse after multiple operations.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a power battery module connecting device assembly, power battery package and vehicle to solve among the prior art power battery assembly complicacy and lead to inefficiency, and assemble the problem that the dislocation influences safe in utilization.

In order to solve the technical problem, the utility model discloses a following technical scheme:

the embodiment of the utility model provides a power battery module connecting device assembly, include: the battery module comprises an electric connecting device and a battery module which is matched and connected with the electric connecting device;

the electric connecting device is provided with a first extension part and a second extension part;

the first extending part is inserted into the battery module, and the second extending part is clamped and fixed to the outer portion of the battery module.

Optionally, the battery module includes: the battery module comprises a battery module body and a connecting interface arranged on the battery module body;

the connection interface includes: a first groove and a second groove;

an inner group leaf spring is arranged on the side wall of the first groove, and the first extension part is inserted into the first groove and is electrically connected with the inner group leaf spring;

the second groove is clamped and fixed with the second extending part.

Optionally, the electrical connection device includes:

a first side plate;

the first extension part is connected with the first side plate and is perpendicular to the first side plate;

wherein the first extension comprises: the first extending part extends into the first groove, and the current-carrying conductor is electrically connected with the group of inner leaf springs.

Optionally, the electrical connection device further includes:

the second extension part is connected with the first side plate and is perpendicular to the first side plate;

and the second extending part is provided with a fixed buckle at one end far away from the first side plate, and the fixed buckle is clamped with the second groove.

Optionally, one side of the fixing buckle facing the battery module is provided with a guide surface.

Optionally, one end of the current-carrying conductor facing the first groove is provided with a chamfer structure.

Optionally, an anti-misassembly structure is arranged on a surface of the first extension part, which faces away from the second extension part;

keep away from first recess and keep away from the direction of second recess, and with prevent mistake dress structure assorted position and be provided with the third recess, the third recess with prevent that mistake dress structure's shape is unanimous.

Optionally, a protruding portion is arranged at one end of the second extending portion, which is far away from the second groove;

when the bulge receives external pressure, the second extending part and the first side plate are arranged in an obtuse angle; when the bulge does not receive external pressure, the second extending part and the first side plate are vertically arranged.

The embodiment of the utility model provides a still provide a power battery package, include as above arbitrary power battery module connecting device assembly.

The embodiment of the utility model provides a still provide a vehicle, include as above power battery package.

The utility model has the advantages that:

among the above-mentioned technical scheme, power battery module connecting device assembly includes: the battery module comprises an electric connecting device and a battery module which is matched and connected with the electric connecting device; the electric connecting device is provided with a first extension part and a second extension part; the first extending part is inserted into the battery module, and the second extending part is clamped and fixed to the outer portion of the battery module. The technical scheme of the utility model can greatly promote power battery package production speed, reduce safe risk, improve the reuse rate of part.

Drawings

Fig. 1 is a schematic structural diagram of a power battery module connecting device assembly according to an embodiment of the present invention;

fig. 2 is a second schematic structural view of a power battery module connecting device assembly according to an embodiment of the present invention;

FIG. 3 shows an enlarged view of A in FIG. 2;

fig. 4 is a schematic structural diagram of an electrical connection device according to an embodiment of the present invention;

fig. 5 is a second schematic structural view of an electrical connection device according to an embodiment of the present invention;

fig. 6 is a third schematic structural diagram of a power battery module connecting device assembly according to an embodiment of the present invention.

Description of reference numerals:

100-an electrical connection means; 101-a current carrying conductor; 1011-chamfer structure; 102-an insulating housing; 103-a boss; 104-fixing a buckle; 105-anti-misassembly structure; 200-a battery module; 201-battery module body; 220-a connection interface; 221-a first groove; 222-a second groove; 201-group inner leaf springs.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments. In the following description, specific details are provided, such as specific configurations and components, merely to facilitate a thorough understanding of embodiments of the invention. Thus, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of the processes should be determined by the functions and the internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

It should be noted that, in the power battery pack in the prior art, because a plurality of battery modules are used as the energy storage device main body, and then the battery modules are electrically connected through the current-carrying conductors to form a high-voltage circuit, the current-carrying conductors are usually installed through bolt connection and can be reused for several times, the installation process consumes long time, the electric shock risk caused by high-voltage exposure exists during installation or maintenance, whether the current-carrying conductors are installed in place after installation is not easy to check, and the risk of accelerated aging and even thermal runaway is caused when the current-carrying conductors are not installed in place. In addition, the main part of current-carrying conductor is located the battery module outside, leads to the space utilization rate of power battery package poor, still damages current-carrying conductor insulating layer when having the collision accident, leads to the unexpected electrified risk of vehicle.

The utility model discloses to among the prior art power battery assembly complicacy lead to inefficiency to and assemble the problem that the dislocation influences safe in utilization, provide a power battery module connecting device assembly, power battery package and vehicle.

As shown in fig. 1 to 6, an optional embodiment of the present invention provides a power battery module connecting device assembly, including: an electrical connection device 100 and a battery module 200 connected with the electrical connection device 100;

the electrical connection device 100 is provided with a first extension part and a second extension part;

the first extension part is inserted into the battery module 200, and the second extension part is clamped and fixed to the outside of the battery module 200.

It should be noted that each battery module 200 includes a plurality of battery cells, and the electrical connection device 100 can combine the plurality of battery cells together to form the battery module 200.

In this embodiment, the electrical connection device 100 and the battery module 200 of the power battery module connection device assembly can be simply and rapidly assembled and disassembled, and can support repeated assembly for more than tens of times, and the conductive part cannot be touched in the installation and maintenance process, thereby greatly improving the production efficiency and the production safety. Because the main part of current-carrying conductor is located the battery module, receive the module frame protection, improved the space utilization and the security of power battery package.

Because the electric connection device self that this application provided has the sound suggestion of assembling in place for need not the secondary and detect during production, reduced the process, accelerated the production rhythm, the cost is reduced.

Optionally, the battery module 200 includes: a battery module body 210 and a connection interface 220 disposed on the battery module body 210;

the connection interface 220 includes: a first groove 221 and a second groove 222;

an intra-group leaf spring 201 is arranged on the side wall of the first groove 221, and the first extending part is inserted into the first groove 221 and electrically connected with the intra-group leaf spring 201;

the second groove 222 is fixed to the second extending portion in a clamping manner.

In this embodiment, the battery module body 210 is a battery module or a battery assembly including a battery core, and is characterized by supporting the design features of the module electrical connection interface 220 of this embodiment. The connecting interface 220 comprises a first groove 221, and the opening size of the first groove 221 is preferably not more than 10mm, so that the design can meet the requirement of finger touch prevention in IPXXB in the shell protection grade; the side wall of the first groove 221 is provided with an in-group leaf spring 201, one end of the in-group leaf spring 201 is connected with a total positive electrode cell or a total negative electrode cell of the battery module 200 and is an electric connection component of the battery module 200, the other end of the in-group leaf spring is electrically connected with the first extension portion, and after the in-group leaf spring 201 is installed in place, the in-group leaf spring is electrically connected with the first extension portion and is in full contact with the first extension portion for conducting and carrying current. The second groove 222 is fixed to the second extension portion in a clamping manner, so that a fixing function is achieved.

Alternatively, as shown in fig. 3 to 5, the electrical connection device 100 includes:

a first side plate;

the first extending part is connected with the first side plate and is perpendicular to the first side plate;

wherein the first extension comprises: a current-carrying conductor 101 and an insulating housing 102, wherein the first extending portion extends into the first groove 221, and the current-carrying conductor 101 is electrically connected to the intra-group leaf spring 201.

In this embodiment, the current-carrying conductor 101 is made of copper, aluminum, or other conductive metals and alloys, and in order to meet the requirements of corrosion resistance, a plating layer made of nickel, tin, or the like may be added on the outer surface, and the insulating shell 102 is disposed outside the current-carrying conductor 101. The insulating shell 102 can be directly attached to the outside of the current-carrying conductor 101 by using processes such as injection molding and the like, and can also be installed outside the current-carrying conductor 101 by using a buckle or insertion design, so that the current-carrying conductor 101 can be effectively contacted with the leaf spring 201 in the battery module in the installation process, and the insulating shell 102 is used for coating the non-contact part of the current-carrying conductor 101 and the battery module 200, and the non-exposed current-carrying conductor 101 can be contacted after the assembly 10 formed by the electrical connection device and the battery module is installed in a matched mode, so that the finger touch prevention requirement of the IPXXD (the tightest protection standard) level in the shell protection level is met.

Optionally, a chamfered structure 1011 is disposed at an end of the current carrying conductor 101 facing the first groove 221.

Here, the chamfered structure 1011 facilitates the first extending portion to extend into the first groove 221, and the chamfered structure 1011 facilitates the introduction of the electrical connection device 100 into the battery module 200.

Optionally, the electrical connection device 100 further includes:

the second extending portion is provided with a fixing buckle 104 at an end far away from the first side plate, and the fixing buckle 104 is clamped with the second groove 222.

In this embodiment, when the fixing clip 104 is effectively engaged with the second groove 222 during the installation process, a noise of more than 7dB is generated according to the resilience generated by the deformation of the material, and the noise can support the operator to be installed in place.

Optionally, a protruding portion 103 is disposed at an end of the second extending portion away from the second groove 222;

when the boss 103 receives external pressure, an obtuse angle is formed between the second extending portion and the first side plate; when the protruding portion 103 does not receive external pressure, the second extending portion and the first side plate are vertically arranged.

In this embodiment, one end of the second extending portion, which is far away from the second groove 222, is provided with a protruding portion 103, the protruding portion 103 needs to be pressed to detach the second extending portion after the second extending portion is mounted in place, and if the protruding portion 103 is not pressed during detachment, the structure and material strength of the fixed buckle 104 and the second groove 222 are matched to provide anti-pulling forces of different sizes according to the requirements of specific application items.

It can be understood that the protrusion 103 may deform the fixing catch 104 of the second extension portion partially when the operator uses a pressure of more than 10N, and at this time, the fixing catch 104 fails to engage with the second groove 222, so that the operator can pull out the electrical connection device 100 smoothly.

Optionally, a guide surface is disposed on a surface of the fixing clip 104 facing the battery module 200.

Here, the guide surface facilitates the extension of the fixing clip 104 of the second extension portion into the second groove 222 of the battery module 200, and facilitates the introduction of the fixing clip 104 into the second groove 222.

Optionally, a surface of the first extension portion facing away from the second extension portion is provided with an anti-misassembly structure 105;

a third groove (not shown) is arranged at a position far away from the first groove 221 and the second groove 222 and matched with the anti-misloading structure 105, and the shape of the third groove is consistent with that of the anti-misloading structure 105.

In this embodiment, the third groove and the anti-misassembly structure 10 are designed and matched, and when the distances between the battery modules 200 are different, in order to prevent the similar electrical connection device 100 from being misassembled by an operator, the different anti-misassembly structures can be used to prevent the undetected misoperations.

Preferably, the electrical connection device 100 is designed to have an orange appearance as the high voltage warning color.

In one embodiment, the electrical connection device 100 is inserted into and mounted in the battery module 200, through several stages in the mounting process: when the installation is not started, the connection interface 220 of the battery module 200 meets the IPXXB protection level, and when the assembly is started, the electrical connection device 100 is installed towards the module electrical connection interface 220, firstly, the mis-installation preventing structure 105 is matched with the third groove, so that the installation can be continued without interference; before the current-carrying conductor 101 comes into contact with the intra-group leaf spring 201 of the battery module, a portion of the current-carrying conductor 101 may not satisfy the IPXXD protection level; when the current-carrying conductor 101 contacts with the intra-group leaf spring 201, the matching design of the structure is needed to ensure that the electrical connection device 100 and the battery module 200 meet the IPXXD finger touch prevention level so as to improve the safety of operators; as the assembly is continued, the fixing clip 104 is guided into the second groove 222, and when a contact noise of more than 7dB occurs, indicating that the assembly is in place, the assembly is completed, and the electrical connection device 100 and the battery module 200 form an assembly after the electrical connection device and the battery module are installed in a matching manner.

To sum up, the utility model discloses a power battery module connecting device assembly includes: a battery module electrically connected to the current-carrying conductor member and supporting the electrical connection device; the electric connection current-carrying conductor part has the design of quick plug-in and pull-out, a shell with insulation and contact prevention functions is arranged outside the current-carrying conductor, and the structural design of the shell has the functions of generating operation prompt tone and preventing misoperation; the battery module supporting the electric connection device uses a leaf spring connection technology to support repeated installation operation. The utility model discloses a power battery module connecting device assembly can greatly promote battery package production speed, reduces safe risk, improves the reuse rate of part.

It should be noted that the power battery pack in this embodiment can achieve the purpose of any one of the above embodiments of the power battery module connecting device assembly, and details are not repeated herein.

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", and the like indicate orientations or positional relationships based on those 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 to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that 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 connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. 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 disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The foregoing is directed to the preferred embodiments of the present invention, and it will be understood by those skilled in the art that various changes and modifications may be made without departing from the principles of the invention, and that such changes and modifications are intended to be included within the scope of the invention.

Claims

1. The utility model provides a power battery module connecting device assembly which characterized in that includes: the battery pack comprises an electric connecting device (100) and a battery module (200) matched and connected with the electric connecting device (100);

the electric connecting device (100) is provided with a first extension part and a second extension part;

the first extending part is inserted into the battery module (200), and the second extending part is clamped and fixed to the outer portion of the battery module (200).

2. The power battery module connecting device assembly according to claim 1, wherein the battery module (200) comprises: a battery module body (210) and a connection interface (220) arranged on the battery module body (210);

the connection interface (220) comprises: a first groove (221) and a second groove (222);

an inner group leaf spring (201) is arranged on the side wall of the first groove (221), and the first extending part is inserted into the first groove (221) and is electrically connected with the inner group leaf spring (201);

the second groove (222) is clamped and fixed with the second extending part.

3. The power battery module connecting device assembly according to claim 2, wherein the electrical connecting device (100) comprises:

a first side plate;

wherein the first extension portion includes: the current-carrying conductor (101) and the insulating shell (102), the first extending part extends into the first groove (221), and the current-carrying conductor (101) is electrically connected with the group of inner leaf springs (201).

4. The power battery module connecting device assembly according to claim 3, wherein the electrical connecting device (100) further comprises:

the second extending portion is provided with a fixing buckle (104) at one end far away from the first side plate, and the fixing buckle (104) is clamped with the second groove (222).

5. The power battery module connecting device assembly according to claim 4, wherein a surface of the fixing buckle (104) facing the battery module (200) is provided with a guide surface.

6. The power battery module connection device assembly according to claim 4, characterized in that the end of the current-carrying conductor (101) facing the first groove (221) is provided with a chamfered structure (1011).

7. The power battery module connecting device assembly as claimed in claim 4, wherein a false installation preventing structure (105) is arranged on the surface of the first extension part facing away from the second extension part;

keep away from first recess (221) and keep away from the direction of second recess (222), and with prevent mistake dress structure (105) assorted position is provided with the third recess, the third recess with prevent mistake dress structure (105) the shape unanimous.

8. The power battery module connecting device assembly according to claim 4, wherein a protrusion (103) is arranged on one end of the second extension part away from the second groove (222);

when the bulge (103) receives external pressure, the second extending part and the first side plate are arranged in an obtuse angle; when the bulge (103) does not receive external pressure, the second extending part and the first side plate are vertically arranged.

9. A power battery pack, characterized by comprising the power battery module connecting device assembly as claimed in any one of claims 1 to 8.

10. A vehicle characterized by comprising the power battery pack according to claim 9.