CN215184366U

CN215184366U - Battery module and electric vehicle battery with same

Info

Publication number: CN215184366U
Application number: CN202120668458.XU
Authority: CN
Inventors: 程志刚; 王天付; 李阳
Original assignee: Nanjing Xinwangda New Energy Co ltd
Current assignee: Nanjing Xinwangda New Energy Co ltd
Priority date: 2021-04-01
Filing date: 2021-04-01
Publication date: 2021-12-14
Anticipated expiration: 2031-04-01

Abstract

The utility model relates to a battery module and have electric automobile battery of this battery module, it includes: a bottom insulating sheet and a plurality of dry battery assemblies; each battery assembly comprises a battery core assembly, an end plate assembly, an insulating plate assembly and a battery shell assembly; the electric core assembly comprises a first electric core group and a second electric core group which are adjacently arranged on the upper surface of the bottom insulating plate; the end plate assembly comprises a first end plate, a second end plate and a third end plate, and the first end plate and the second end plate are respectively arranged at the outer ends of the first electric core group and the second electric core group and are used for clamping and fixing the first electric core group and the second electric core group; the third end plate is arranged between the first electric core group and the second electric core group, and the third end plate is provided with a total positive and negative output end for connecting with the first electric core group and the second electric core group to form a loop; the insulating plate assembly is arranged between the electric core assembly and the three-terminal plate assembly; the battery shell component is arranged outside the electric core component in an enclosing mode. The utility model discloses can wide application in the electric automobile field.

Description

Battery module and electric vehicle battery with same

Technical Field

The utility model relates to an electric automobile battery technical field, more specifically relate to a battery module and have electric automobile battery of this battery module with high-pressure connection overall arrangement.

Background

With the increasing energy crisis and environmental problems in recent years, new energy automobile technology is being vigorously developed in many countries in the world to meet the crisis, and people also put higher demands on the price and safety performance of new energy automobiles.

In daily driving, an automobile always faces complex and changeable road conditions, the battery module can bear long-time vibration and impact, and as the heart of the whole electric automobile, the structural stability of the battery module directly influences the safety of the whole automobile. Therefore, a safe and reliable battery module structure is desired to be designed.

A total positive output terminal and a total negative output terminal are generally provided in the conventional battery module and are disposed at the end plates at both ends, respectively. This battery module structure exposes total positive output and total negative output in the outside, and in normally traveling, car battery module both ends often can receive inside compressive stress, and long-time extrusion will be destroyed with the impact and expose the terminal insulation protection at the battery module distolateral, lead to catching fire and explode even, seriously influence whole car security performance.

Disclosure of Invention

To the problem, the utility model aims at providing a battery module and have electric automobile battery of this battery module, this battery module will always anodal output and total negative pole output arrange battery module middle part in, make it obtain effectual protection, avoid receiving the extrusion and cause the short circuit, greatly improved whole car security performance.

In order to achieve the purpose, the utility model adopts the following technical proposal:

the utility model discloses a first aspect provides a battery module, and it includes: the battery pack comprises a bottom insulating sheet and a plurality of dry battery assemblies arranged on the bottom insulating sheet;

each battery assembly comprises a core assembly, an end plate assembly, an insulating plate assembly and a battery shell assembly;

the electric core assembly comprises a first electric core group and a second electric core group which are adjacently arranged on the upper surface of the bottom insulating plate;

the three-terminal plate assembly comprises a first end plate, a second end plate and a third end plate, and the first end plate and the second end plate are respectively arranged at the outer ends of the first electric core group and the second electric core group and are used for clamping and fixing the first electric core group and the second electric core group; the third end plate is arranged between the first electric core group and the second electric core group, and the third end plate is provided with a total positive output end and a total negative output end which are respectively connected with the first electric core group and the second electric core group to form a loop;

the insulating plate assembly is arranged between the electric core assembly and the three end plate assemblies and plays an insulating role;

the battery shell assembly is arranged around the outside of the electric core assembly to play a role in supporting and protecting.

Further, the insulation plate assembly comprises four end plate insulation plates, and each end plate insulation plate is respectively arranged between the two ends of the first electric core group and the first end plate and the third end plate, and between the two ends of the second electric core group and the second end plate and the third end plate.

Further, the battery shell assembly comprises two side plates and two upper cover plates; the two side plates are respectively arranged on the outer sides of the first cell group and the second cell group, and two ends of the two side plates are respectively fixedly connected with the connecting grooves reserved on two sides of the first end plate and the second end plate; and the upper cover plate is respectively arranged above the first electric core group and the second electric core group and is clamped with the bayonet reserved on the upper part of the side plate.

Furthermore, an electric isolation plate and a bus bar are arranged between the two upper cover plates and the first electric core group and the second electric core group, and installation positions for fixing the bus bar are arranged on the two electric isolation plates; the busbar sets up on the electrical isolation board, respectively with the electric core utmost point post of first electric core group and second electric core group is connected for connect a plurality of electric cores form behind the return circuit with always just, negative pole output links to each other.

Furthermore, a flexible circuit board is further arranged between the electric isolation board and the upper cover plate, is connected with the bus bar and is connected with an external acquisition wire harness through a connector, and transmits electric signals in the battery assemblies to a battery management system.

Furthermore, the upper side of the middle part of each of the two side plates is provided with a groove for an external integrated wiring harness to pass through.

Furthermore, a clamping groove for fixing the third end plate is arranged on the bottom insulating sheet corresponding to the third end plate.

The second aspect of the utility model provides an electric automobile battery, electric automobile battery includes a plurality of the battery module.

The utility model discloses owing to take above technical scheme, it has following advantage:

1. in the battery component, the total positive output electrode and the total negative output electrode are arranged at the third end plate in the middle of the battery component, so that the battery component is effectively protected, and the short circuit caused by extrusion in the driving process is avoided;

2. the utility model discloses in through set up the recess in the middle part of the curb plate for battery pack's signal of telecommunication can be connected with the outside concentrated pencil that sets up in the battery module middle part behind busbar, flexible circuit board in proper order, has simplified the pencil overall arrangement of battery package.

Therefore, the utility model discloses can the wide application in electric automobile battery technical field.

Drawings

Fig. 1 is an isometric view of a battery module according to an embodiment of the present invention;

fig. 2 is an exploded view of the battery module shown in fig. 1;

fig. 3 is a schematic diagram of the wiring manner between the battery modules according to an embodiment of the present invention;

fig. 4(a) -fig. 4(c) are schematic diagrams of high-voltage connection between cells in the battery module according to the present invention, wherein fig. 4(a) illustrates that odd cells are connected to odd cells; fig. 4(b) shows that even cells are connected to even cells; fig. 4(c) shows that even cells are connected to odd cells;

the components in the figure are as follows: 1. a bottom insulating sheet; 2. a battery assembly; 11. a card slot; 21. an electrical core assembly; 22. a three-terminal plate assembly; 23. an insulating plate assembly; 24. a battery housing assembly; 211. a first electric core group; 212. a second electric core group; 221. a first end plate; 222. a second end plate; 223. a third end plate; 224. a total positive output terminal; 225. a total negative output end; 231. an end plate insulating plate; 241. a side plate; 242. an upper cover plate; 243. a groove; 244. an electrical isolation plate; 245. a flexible circuit board; 246. an outer concentrating wire harness.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the system or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "assembled", "disposed" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model provides a battery module structure, this battery module structure adopt three terminal plate structures, through arranging total positive output and total negative output in the middle end plate department of battery module, also be about to total positive output and total negative output and arrange battery module middle part in, have avoided it to directly bear the extrusion force, have effectively improved the security performance of battery module and whole car. In addition, at the in-process of whole battery package overall arrangement, can switch on the pencil to fix in the middle part at each battery module in unison, simplified the pencil structure, reduce the installation degree of difficulty.

Example 1

As shown in fig. 1 to 3, the present embodiment provides a battery module, which includes: bottom insulating sheet 1 and set up if dry battery pack 2 on bottom insulating sheet 1. Each of the battery modules 2 includes a core module 21, an end plate module 22, an insulating plate module 23, and a battery case module 24. Wherein, the electric core assembly 21 comprises a first electric core group 211 and a second electric core group 212 adjacently arranged on the upper surface of the bottom insulation sheet 1; the three terminal plate assembly 22 comprises a first terminal plate 221, a second terminal plate 222 and a third terminal plate 223, the first terminal plate 221 and the second terminal plate 222 are respectively arranged at the outer ends of the first electric core group 211 and the second electric core group 212 for clamping and fixing the first electric core group 211 and the second electric core group 212; the third end plate 223 is arranged between the first electric core group 211 and the second electric core group 212, and the third end plate 223 carries a total positive output end 224 and a total negative output end 225, and the total positive output end 224 and the total negative output end 225 are respectively connected with the first electric core group 211 and the second electric core group 212 to form a loop; the insulation plate assembly 23 is arranged between the electric core assembly 21 and the three-terminal plate assembly 22 and plays an insulation role; the battery shell assembly 24 is enclosed outside the electric core assembly 21 and plays a role in supporting and protecting.

In the above embodiment, preferably, the insulating plate assembly 23 includes four end plate insulating plates 231, and each of the end plate insulating plates 231 is disposed between both ends of the first electric core group 211 and the first and third end plates 221 and 223 and between both ends of the second electric core group 212 and the second and

third end plates

222 and 223, respectively.

In the above embodiment, preferably, the battery case assembly 24 includes two side plates 241 and two upper cover plates 242; wherein, the two side plates 241 are respectively arranged at the outer sides of the first electric core group 211 and the second electric core group 212, and two ends of the two side plates 241 are respectively fixedly connected with the connecting grooves reserved at two sides of the first end plate 221 and the second end plate 222; the two upper cover plates 242 are respectively arranged above the first electric core group 211 and the second electric core group 212 and are clamped with the bayonets reserved at the upper parts of the two side plates 241.

In the above embodiment, it is preferable that the upper sides of the middle portions of the two side plates 241 are provided with the grooves 243 for passing the external concentrated wire harnesses therethrough.

In the above embodiment, preferably, an electrical isolation plate 244 and a bus bar (not shown in the figure) are disposed between the two upper cover plates 242 and the first electric core group 211 and the second electric core group 212, wherein the two electrical isolation plates 244 are respectively used for fixing the bus bar, and the bus bar is respectively connected to each electric core pole of the first electric core group 211 and the second electric core group 212, and is used for connecting a plurality of electric cores to form a loop and then connecting to the total positive output end 224 and the total negative output end 225.

In the above embodiment, preferably, a flexible circuit board 245 is further disposed between the electrical isolation plate 244 and the upper cover plate 242, the flexible circuit board 245 is connected to the bus bars and is connected to an external concentrated wire harness 246 through a connector, so as to transmit electrical signals in each battery assembly 2 to a Battery Management System (BMS), and the battery management system uniformly controls the battery modules, thereby ensuring the normal operation of the battery modules.

In the above embodiment, preferably, the bottom insulation sheet 1 is provided with a clamping groove 11 corresponding to the third end plate 223, for fixing the third end plate 223.

As shown in fig. 4(a) -4 (b), high-voltage connections between battery cells in the battery module are illustrated. It can be seen that the number of the cells on both sides of the third end plate 223, whether singular or even, can be concentrated at the third end plate 223 by the positive and negative output terminals through the design of the strong electric connection circuit. As shown in fig. 4(a), the number of the cells on both sides of the third end plate 223 is 5 (for convenience of description, the cells are numbered from left to right in the drawing as cells 1 to 10), when in connection, the positive electrode of the cell 1 is connected with the negative electrode of the cell 2, the positive electrode of the cell 2 is connected with the negative electrode of the cell 4, the negative electrode of the cell 1 is connected with the positive electrode of the telecommunications 3, the negative electrode of the cell 3 is connected with the positive electrode of the cell 5, and the positive electrode of the cell 4 is used as the positive output end of the left telecommunications assembly; the negative pole of No. 5 electricity core links to each other with the positive pole of No. 7 electricity core on third terminal plate right side, the negative pole of No. 7 electricity core links to each other with the positive pole of No. 9 electricity core, the negative pole of No. 9 telecommunications links to each other with the positive pole of No. 10 electricity core, the negative pole of No. 10 electricity core links to each other with the positive pole of No. 8 electricity core, the negative pole of No. 8 electricity core links to each other with the positive pole of No. 6 electricity core, the negative pole output of No. 6 electricity core as this electricity core subassembly sets up in third terminal plate department. Fig. 4(a) can be referred to for the connection mode of the battery cells in fig. 4(b) and fig. 4(c), and the description of the present invention is omitted here.

The utility model discloses a theory of operation does: in the aspect of electric energy, electric signals of the battery module are collected through an external integrated wiring harness and then transmitted to a battery management system together with electric signals of the bus bar, and the battery management system uniformly controls the battery module to ensure the normal work of the battery module; in the aspect of structure, when two end plates, namely a first end plate 221 and a second end plate 222, are respectively arranged at two ends of the cell assembly, a third end plate 223 is further arranged in the middle of the battery module, and the functions of integrating the wiring harness and bearing the positive and negative output ends of the battery module are achieved.

Example 2

The embodiment provides an electric vehicle battery, which comprises a plurality of battery modules according to the above embodiments.

The above-mentioned embodiments are only used for explaining the present invention, wherein the structure, connection mode, etc. of each component can be changed, all the equivalent transformation and improvement performed on the basis of the technical solution of the present invention should not be excluded from the protection scope of the present invention.

Claims

1. A battery module, comprising: the battery pack comprises a bottom insulating sheet and a plurality of dry battery assemblies arranged on the bottom insulating sheet;

the end plate assembly comprises a first end plate, a second end plate and a third end plate, the first end plate and the second end plate are respectively arranged at the outer ends of the first electric core group and the second electric core group and are used for clamping and fixing the first electric core group and the second electric core group; the third end plate is arranged between the first electric core group and the second electric core group, and the third end plate is provided with a total positive output end and a total negative output end which are respectively connected with the first electric core group and the second electric core group to form a loop;

the insulating plate assembly is arranged between the electric core assembly and the end plate assembly and plays an insulating role;

2. The battery module according to claim 1, wherein: the insulation board assembly comprises four end board insulation boards, and each end board insulation board is arranged between the two ends of the first electric core group and the first end board and the third end board and between the two ends of the second electric core group and the second end board and the third end board respectively.

3. A battery module according to claim 1 or 2, wherein: the battery shell component comprises two side plates and two upper cover plates; the two side plates are respectively arranged on the outer sides of the first cell group and the second cell group, and two ends of the two side plates are respectively fixedly connected with the connecting grooves reserved on two sides of the first end plate and the second end plate; and the upper cover plate is respectively arranged above the first electric core group and the second electric core group and is clamped with the bayonet reserved on the upper part of the side plate.

4. A battery module according to claim 3, wherein: an electric isolation plate and a bus bar are arranged between the two upper cover plates and the first electric core group and the second electric core group, and installation positions for fixing the bus bar are arranged on the two electric isolation plates; the busbar sets up on the electrical isolation board, respectively with the electric core utmost point post of first electric core group and second electric core group is connected for connect a plurality of electric cores form behind the return circuit with always just, negative pole output links to each other.

5. The battery module according to claim 4, wherein: and a flexible circuit board is further arranged between the electric isolation plate and the upper cover plate, is connected with the bus bar and is connected with an external acquisition wire harness through a connector, and transmits electric signals in the battery assemblies to a battery management system.

6. The battery module according to claim 4, wherein: and a groove for an external integrated wiring harness to pass through is formed in the upper side of the middle of each of the two side plates.

7. The battery module according to claim 1, wherein: and a clamping groove for fixing the third end plate is arranged on the bottom insulating sheet corresponding to the third end plate.

8. An electric vehicle battery, characterized in that the electric vehicle battery comprises a plurality of battery modules according to any one of claims 1 to 7.