CN206313014U - Negative pole confluxes busbar and battery modules - Google Patents

Abstract

The utility model provides a negative busbar, which includes a substrate and a busbar fixedly connected to the surface of the substrate. The busbar includes a plurality of claw buckle units, and each claw buckle unit includes a main body and a main body formed by the main body. A plurality of connecting pieces and a plurality of claw pieces formed by extension; the main body is against the substrate and electrically connected with the substrate; the claw button unit is connected with other adjacent claw button units through the connecting piece Hollow holes are connected and formed between adjacent claw buckle units; the claw piece is formed by extending from the main body part in a direction perpendicular to the main body part and away from the substrate; a plurality of the claw pieces surround a corresponding The main body forms a space for accommodating batteries. The battery module using the negative busbar has the advantages of high assembly and maintenance efficiency, simple structure and strong connection reliability.

Description

Negative busbar and battery module

【Technical field】

The utility model relates to the technical field of batteries, in particular to a negative electrode busbar and a battery module using the negative electrode busbar.

【Background technique】

Under the pressure of energy crisis and environmental pollution, safety, environmental protection and energy saving have become the themes of automobile development. Electric vehicles are highly valued by transportation and energy departments because of their advantages of energy saving, environmental protection and pollution-free. In recent years, the new energy vehicle industry has ushered in explosive growth. As the power core of electric vehicles, batteries are a very important part of the entire electric vehicle. The battery system of an electric vehicle is often composed of hundreds of single batteries connected in series and parallel. The reliability of the connection scheme between batteries is related to the safety of the entire vehicle.

At present, the common connection methods of batteries are copper strip welding or welding screws and bolts at both ends of the battery. These two methods have the following problems: the assembly efficiency is low, and each battery needs to be welded; when welding the negative electrode of the battery steel case, due to the battery The negative electrode of the steel shell is thin, which has the risk of penetration and is easy to cause damage to the battery; the entire module or box needs to be replaced during maintenance, resulting in a large waste of materials or manpower.

【Content of utility model】

The purpose of the utility model is to provide a negative electrode busbar with improved assembly and maintenance efficiency, simple structure and increased connection reliability, and a battery module using the negative electrode busbar.

In order to achieve the above object, the utility model provides a negative busbar, including a substrate and a busbar fixedly connected to the surface of the substrate, the busbar includes a plurality of claw buckle units, each claw buckle unit includes a main body and A plurality of connecting pieces and a plurality of claw pieces extending from the main body; the main body is against the substrate and is electrically connected to the substrate; the claw unit is connected to the adjacent Other claw buckle units are connected and hollow holes are formed between adjacent claw buckle units; the claw piece is formed by extending from the main body to a direction perpendicular to the main body and away from the substrate; a plurality of the claws The sheet forms a space for accommodating a battery around a corresponding one of the main body parts.

In a preferred embodiment, the substrate is provided with a plurality of through holes penetrating the substrate, and the center of the main body part is provided with a positioning hole, and the shape and size of the through hole and the positioning hole are the same and one by one. Corresponding distribution; the base plate further includes a first mounting protrusion extending from a part of the edge of the base plate, and the first mounting protrusion defines a first mounting hole.

In a preferred embodiment, the plurality of claws extending from each main body are bent toward the center of the corresponding one of the main body to form an arc; the plurality of claws surround the corresponding one of the main body to form a A containment space with a circular cross section.

In a preferred embodiment, the number of the claw pieces extended from one main body part is equal to the number of the connecting pieces.

In a preferred embodiment, the number of the claw pieces extended from one of the main body parts is six and arranged adjacently at intervals.

The utility model provides a battery module, which includes a negative busbar, a positive busbar and a plurality of batteries, the negative busbar is arranged opposite to the positive busbar at intervals; the battery includes a negative housing and A positive electrode cap, the negative electrode housing is electrically connected to the negative electrode bus bar, and the positive electrode cap is electrically connected to the positive electrode bus bar; it is characterized in that: the negative electrode bus bar includes a substrate and is fixedly connected to the The bus sheet on the surface of the substrate, the bus sheet includes a plurality of claw buckle units, each claw button unit includes a main body, a plurality of connecting pieces and a plurality of claw pieces formed by extending from the main body; the main body Abut against the substrate and electrically connected with the substrate; the claw button unit is connected to other adjacent claw button units through the connecting piece, and a hollow hole is formed between adjacent claw button units; the claw piece It is formed by extending the main body in a direction perpendicular to the main body and away from the substrate; the positive busbar is provided with a plurality of installation protrusions, and the installation protrusions are provided with grooves; the The side of the negative busbar provided with the bus piece is opposite to the side of the positive busbar provided with the mounting protrusions, and the claw buckle unit is distributed in one-to-one correspondence with the mounting protrusions; The protrusion of the positive electrode cap of the battery is limitedly fitted and electrically connected with the groove of the installation protrusion; the end of the negative electrode casing of the battery away from the positive electrode cap abuts against a corresponding main body and is connected to the main body. The plurality of claw pieces formed by extending the upper part are electrically connected and fixedly fitted.

In a preferred embodiment, the substrate is provided with a plurality of through holes penetrating the substrate, and the center of the main body part is provided with a positioning hole, and the shape and size of the through hole and the positioning hole are the same and one by one. Corresponding distribution; the substrate also includes a first mounting protrusion extending from the edge of the substrate part, and the first mounting protrusion is provided with a first mounting hole; the busbar also includes a positive busbar A second installation protrusion is formed by extending part of the edge of the row, and the second installation protrusion is opened with a second installation hole.

In a preferred embodiment, the plurality of claws extending from each main body are bent toward the center of the corresponding one of the main body to form an arc; the plurality of claws surround the corresponding one of the main body to form a A containment space with a circular cross section.

In a preferred embodiment, the number of the claw pieces extended from one main body part is equal to the number of the connecting pieces.

In a preferred embodiment, the number of the claw pieces extended from one of the main body parts is six and arranged adjacently at intervals.

The negative busbar provided by the utility model adopts a plurality of claw structures to ensure elastic and reliable connection with the battery, and effectively reduce contact resistance; the battery module using the negative busbar has a simple structure and high assembly and maintenance efficiency.

【Description of drawings】

FIG. 1 is a schematic diagram of the three-dimensional structure of the battery module of the present invention.

FIG. 2 is a schematic perspective view of the negative electrode busbar of the battery module shown in FIG. 1 .

FIG. 3 is a three-dimensional schematic diagram of the assembled negative busbar and a plurality of batteries of the battery module shown in FIG. 1 .

FIG. 4 is a schematic perspective view of the positive electrode busbar of the battery module shown in FIG. 1 .

【detailed description】

In order to make the purpose, technical solution and beneficial technical effects of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementations described in this specification are only for explaining the utility model, not for limiting the utility model.

Please refer to FIG. 1 , the present invention provides a new battery module 100 , which includes a negative busbar 10 , a positive busbar 20 and a plurality of batteries 30 . The negative bus bar 10 and the positive bus bar 20 are spaced apart from each other, and the battery 30 is arranged between the negative bus bar 10 and the positive bus bar 20 . The battery 30 includes a negative case 31 and a positive cap 32 , the negative case 31 is electrically connected to the negative busbar 10 , and the positive cap 32 is electrically connected to the positive busbar 20 .

Please refer to FIG. 2 together. The negative busbar 10 includes a base plate 11 and a bus plate 12 fixedly connected to the surface of the base plate 11. The bus plate 12 includes a plurality of claw buckle units 121, and each claw buckle unit 121 It includes a main body portion 1211 and a plurality of connecting pieces 1212 and a plurality of claw pieces 1213 extending from the main body portion 1211 . Specifically, the main body portion 1211 leans against the substrate 11 and is electrically connected to the substrate 11 . The claw buckle unit 121 is connected to other adjacent claw buckle units 121 through the connecting piece 1212 and a hollow hole 122 is formed between the adjacent claw buckle units 121 . The claw piece 1213 is formed by extending from the main body portion 1211 in a direction perpendicular to the main body portion 1211 and away from the substrate 11 . A plurality of claws 1213 extending from each main body 1211 are bent toward the center of a corresponding main body 1211 to form an arc. A plurality of claw pieces 1213 surround a corresponding one of the main body portions 1211 to form a receiving space with a circular cross section. Further, the substrate 11 is provided with a plurality of through holes 111 penetrating through the substrate 11, and the center of the main body 1211 is provided with a positioning hole 1214, and the shape and size of the through holes 111 and the positioning holes 1214 are the same. And one-to-one corresponding distribution ensures reliable connection and plays the role of saving materials and weight. Further, the number of the claw pieces 1213 extending from one main body portion 1211 is the same as the number of the connecting pieces 1212 .

Please refer to FIG. 3 together. In this embodiment, the number of the claws 1212 extended from one main body 1211 is six and arranged adjacently at intervals; the negative electrode case 31 of the battery 30 is far away from all One end of the positive electrode cap 30 is accommodated in the space surrounded by the six claw pieces 1212 and the corresponding one of the main body parts 1211 and leans against the main body part 1211, and the claw pieces 1213 pass through the negative electrode case 31 Flexible connection, and also play the role of electrical connection and fixation.

In this embodiment, the substrate 11 is made of metallic copper; the busbar 10 is punched and cut from a whole sheet of metal to ensure that the position of each claw unit 121 has a small relative error and has a high processing efficiency. Efficiency: the substrate 11 and the main body 1211 of the busbar 12 are welded together by multi-points.

Please also refer to FIG. 4 , the positive busbar 20 is provided with a plurality of installation protrusions 21 , and the installation protrusions 21 are provided with grooves 211 . The groove 211 can be limitedly matched with the protrusion 321 of the positive electrode cap 32 of the battery 30 . In this embodiment, the groove 21 is cylindrical and located at the center of the installation protrusion 21 .

Further, the base plate 11 also includes a first mounting protrusion 112 extending from a part of the edge of the base plate 11 , and the first mounting protrusion 112 is opened with a first mounting hole penetrating through the first mounting protrusion 112 1121. The positive bus bar 20 also includes a second installation protrusion 22 extending from a part of the edge of the positive bus bar 20 , and the second installation protrusion 22 is opened with a hole penetrating through the second installation protrusion 22 . The second installation hole 221 .

During use, the negative busbar 10 is arranged parallel to the positive busbar 20, and the side of the negative busbar 10 welded with the bus piece 12 is provided with the positive busbar 20. One side of the convex portion 21 is spaced apart from each other, the claw unit 121 is distributed one by one with the mounting protrusions 211 , and the battery 30 and the positive electrode busbar 20 pass through the protrusion 321 on the positive electrode cap 32 Fitted with the groove 211 of the installation protrusion 21 and electrically connected, the end of the negative electrode casing 31 of the battery 30 away from the positive electrode cap 32 abuts against a corresponding main body portion 1211 and is connected to the main body portion 1211 The extended claw pieces 1212 are electrically connected and fixedly matched.

The negative busbar provided by the utility model adopts a plurality of claw structures to ensure elastic and reliable connection with the battery, and effectively reduce contact resistance; the battery module using the negative busbar has a simple structure and high assembly and maintenance efficiency.

The utility model is not limited to the description in the description and the implementation, so those skilled in the art can easily realize additional advantages and modifications, so without departing from the spirit and general concept defined by the claims and equivalent scope Without limitation, the invention is not limited to the specific details, representative apparatus, and illustrative examples shown and described herein.

Claims (10)

1. A negative electrode busbar, characterized in that: it includes a substrate and a bus piece fixedly connected to the surface of the substrate, the bus piece includes a plurality of claw buckle units, and each claw buckle unit includes a main body and is formed by the A plurality of connecting pieces and a plurality of claw pieces formed by the extension of the main body; the main body is against the substrate and is electrically connected to the substrate; the claw unit is connected to other adjacent claw buttons through the connecting piece The units are connected and a hollow hole is formed between adjacent claw buckle units; the claw piece is formed by extending from the main body part to a direction perpendicular to the main body part and away from the substrate; a plurality of the claw pieces surround the corresponding One of the main body parts forms a space for accommodating a battery. 2. The negative busbar according to claim 1, characterized in that: the substrate is provided with a plurality of through holes penetrating the substrate, the center of the main body part is provided with a positioning hole, and the through holes are aligned with the through holes. The positioning holes have the same shape and size and are distributed in one-to-one correspondence; the base plate also includes a first mounting protrusion extending from a part of the edge of the base plate, and the first mounting protrusion defines a first mounting hole. 3. The negative electrode busbar according to claim 1, characterized in that: the plurality of claw pieces extended from each main body part bend toward the center of the corresponding one of the main body parts to form an arc; The claw piece forms a receiving space with a circular cross section around the corresponding one of the main body parts. 4 . The negative electrode busbar according to claim 1 , wherein the number of the claw pieces extended from one of the main body parts is equal to the number of the connecting pieces. 5 . The negative busbar according to claim 4 , wherein the number of the claw pieces extended from one of the main body parts is six and arranged adjacently at intervals. 5 . 6. A battery module, comprising a negative busbar, a positive busbar, and a plurality of batteries, the negative busbar and the positive busbar are arranged at intervals opposite to each other; the battery includes a negative housing and a positive cap , the negative electrode casing is electrically connected to the negative electrode bus bar, and the positive electrode cap is electrically connected to the positive electrode bus bar; it is characterized in that: the negative electrode bus bar includes a substrate and is fixedly connected to the The bus sheet on the surface of the substrate, the bus sheet includes a plurality of claw buckle units, each claw button unit includes a main body, a plurality of connecting pieces and a plurality of claw pieces formed by extending from the main body; the main body abuts against On the substrate and electrically connected with the substrate; the claw button unit is connected to other adjacent claw button units through the connecting piece, and a hollow hole is formed between adjacent claw button units; the claw piece is formed by the The main body extends in a direction perpendicular to the main body and away from the substrate; the positive busbar is provided with a plurality of installation protrusions, and the installation protrusions are provided with grooves; the negative busbar The side of the busbar provided with the busbar is opposite to the side of the positive busbar provided with the installation protrusion, and the claw buckle unit and the installation protrusion are arranged in a one-to-one correspondence; the battery The protrusion of the positive electrode cap is limitedly fitted with the groove of the installation protrusion and is electrically connected; the end of the negative electrode casing of the battery away from the positive electrode cap abuts against a corresponding main body and extends with the main body The formed claws are electrically connected and fixedly matched. 7. The battery module according to claim 6, wherein the substrate is provided with a plurality of through holes penetrating through the substrate, the center of the main body part is provided with a positioning hole, and the through holes are connected to the The positioning holes have the same shape and size and are distributed in one-to-one correspondence; the substrate also includes a first installation protrusion extending from the edge of the substrate part, and the first installation protrusion is provided with a first installation hole; the confluence The busbar further includes a second installation protrusion extending from a part of the edge of the positive busbar, and the second installation protrusion defines a second installation hole. 8. The battery module according to claim 6, characterized in that: the plurality of claws extending from each main body bend toward the center of the corresponding one of the main body to form an arc; the plurality of claws The sheet surrounds a corresponding one of the main body parts to form a receiving space with a circular cross section. 9 . The battery module according to claim 6 , wherein the number of the claw pieces extended from one of the main body parts is equal to the number of the connecting pieces. 10 . The battery module according to claim 9 , wherein the number of the claw pieces extended from one of the main body parts is six and arranged adjacently at intervals. 11 .