CN205921026U - Battery module - Google Patents

Abstract

A battery module, including a plurality of single cells, a base corresponding to the number of single cells, and a bus circuit board; each single cell includes a positive terminal, a negative terminal opposite to the positive terminal, and a battery located at the positive terminal. and the shell between the negative terminal, the positive terminal is provided with a clamping portion; the base is provided with an electrical connector; the bus circuit board includes a positive bus layer on the positive bus layer, and the positive bus layer is located on the positive bus layer. A plurality of clamping connectors are arranged on the bus layer, and via holes corresponding to the clamp connectors are opened on the negative bus layer; the base is arranged on the negative bus layer, and each single battery is sleeved on the corresponding One outside the base and the clamping part is located in the corresponding via hole and is clamped by the corresponding clamping connector, and the positive end is electrically connected to the positive bus layer through the clamping part and the clamping connector; the shell and the base The corresponding electrical connectors are connected; the electrical connectors are further connected to the negative electrode bus layer.

Description

battery module

【Technical field】

The utility model relates to the technical field of electric vehicles, in particular to a battery module.

【Background technique】

Under the pressure of energy crisis and environmental pollution, safety, environmental protection, and energy saving have become the themes of today's automobile development. Electric vehicles have been highly valued and supported by transportation and energy departments because of their advantages in energy saving, environmental protection, and pollution-free. In recent years, The new energy automobile industry ushered in explosive growth. The current confluence of battery cells mainly uses bolt connection and welding to fix the battery cells on the copper plate, and realizes the series-parallel connection between batteries through a large number of wire harnesses and complex circuits. Such confluence method has complicated circuit structure, too many wiring harnesses, poor reliability, complicated installation, inconvenient maintenance, too many copper nuts, bolts and wiring harnesses, which is not conducive to the lightweight of the whole vehicle.

【Content of utility model】

The purpose of this utility model is to provide a battery module that is "wireless", easy to install, easy to maintain, not easy to fall off in long-term operation, high in reliability and lightweight.

In order to achieve the above object, the utility model provides a battery module, which includes a plurality of single cells, bases corresponding to the number of single cells, and a bus circuit board; each single cell includes a positive terminal opposite to the positive terminal. The negative terminal of the negative terminal and the shell between the positive terminal and the negative terminal, the positive terminal is provided with a clamping part; the electrical connector is provided in the base; the bus circuit board includes a positive bus layer located on the positive terminal The negative bus layer on the bus layer, the positive bus layer is provided with a plurality of clamping connectors, and the negative bus layer is provided with via holes corresponding to the clamp connectors one by one; the base is arranged on the negative bus layer , each single battery is set outside a corresponding base and the holding part is located in the corresponding via hole and held by the corresponding holding connector, and the positive terminal is electrically connected to the positive electrode through the holding part and the holding connector The bus layer; the shell is connected to the corresponding electrical connector in the base; the electrical connector is further connected to the negative bus layer.

In a preferred embodiment, the clamping portion includes a connecting portion and a head located at one end of the connecting portion; the connecting portion is cylindrical and one end is connected to the positive end, and the head includes a An extremely circular end surface, the circular end surface is coaxial with the connecting portion and has a diameter larger than the connecting portion; the clamping connection member includes a clamping arm surrounding and abutting against the clamping portion.

In a preferred embodiment, the head further includes a first guide surface and a second guide surface located between the connecting portion and the end surface; the first guide surface is in the shape of a frustum The end surface is adjacent, and the other side is adjacent to the second guide surface, and the diameter of the first guide surface gradually increases from the end surface to the connecting part; the second guide surface is frustum-shaped and one side It is adjacent to the first guide surface, and the other side is adjacent to the connection portion, and the diameter of the second guide surface gradually increases from the connection portion to the end surface.

In a preferred embodiment, the clamping arm includes an elastic section, a bent section and a contact section; one end of the elastic section is electrically connected to the positive bus layer, and the bent section is away from the positive electrode from the elastic section. One end of the bus layer extends toward the clamping portion, and the bent section forms an included angle with the elastic section; the contact section extends from an end of the bent section away from the elastic section to the elastic section; and The bending section forms an included angle with the contact section, and the connection between the bending section and the contact section forms an abutment point, and the abutment point abuts against the second guide surface and the connecting portion superior.

In a preferred embodiment, a positive electrode contact point is provided on the positive electrode bus layer, and one end of the elastic segment is welded to the positive electrode contact point.

In a preferred embodiment, each base is provided with a through hole, and one end of the base extends toward the center of the through hole to form a flange; the electrical connector includes an arc-shaped main body and a plurality of Contact feet: the electrical connection is accommodated in the through hole, the main body leans against the flange, and the contact feet are in contact with the shell.

In a preferred embodiment, the housing is pressed with an annular groove, and the plurality of contact legs are evenly spaced in an arc shape, and each contact leg is elongated and the middle part protrudes toward the central axis of the main body. An arc-shaped positioning portion; the positioning portion is located in the annular groove.

In a preferred embodiment, the negative electrode bus layer is provided with a negative electrode contact point, and the end of the contact leg away from the main body is further electrically connected to the negative electrode contact point.

In a preferred embodiment, the base is in the shape of a hexagonal prism, the inner edge of the flange is circular, the single battery is cylindrical, and the shape of the shell of the single battery corresponds to the shape of the convex shell. The shape of the inner edge of the edge.

In a preferred embodiment, the bus circuit board further includes an insulating layer located between the positive bus layer and the negative bus layer; the negative bus layer and the insulating layer jointly open the via hole.

The single battery of the utility model can be assembled or separated from the bus circuit board by plugging and unplugging, which saves the existing cable and screw structures, has a compact structure, and is more convenient and safe to use.

【Description of drawings】

Fig. 1 is a schematic three-dimensional assembly diagram of a battery module provided by a preferred embodiment of the present invention.

Fig. 2 is a three-dimensional exploded schematic diagram of some components of the battery module provided by the preferred embodiment of the present invention.

Fig. 3 is a perspective view of a single battery of the battery module provided by the preferred embodiment of the present invention.

FIG. 4 is a partial cross-sectional view of the assembled battery modules 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.

As shown in Figure 1, Figure 3 and Figure 4, a battery module 100 provided by the present invention includes a plurality of single cells 10, bases 20 corresponding to the number of single cells and bus circuit boards 30; each The single battery 10 includes a positive terminal 101, a negative terminal 102 opposite to the positive terminal 101, and a housing 103 located between the positive terminal 101 and the negative terminal 102. The positive terminal 101 is provided with a clamping portion 104; The base 20 is provided with an electrical connector 40; the bus circuit board 30 includes a positive bus layer 31 and a negative bus layer 32 located on the positive bus layer 31, and a plurality of clamping connectors 311 are arranged on the positive bus layer 31. The via holes 321 corresponding to the clamping connectors 311 are opened on the negative electrode bus layer 32; the base 20 is arranged on the negative electrode bus layer 32, and each single battery 10 is sleeved on the corresponding base 20 and The clamping part 104 is located in the corresponding via hole 321 and is clamped by the corresponding clamping connector 311, and the positive terminal 101 is electrically connected to the positive electrode bus layer 31 through the clamping part 104 and the clamping connector 311; the shell 103 It is connected to the corresponding electrical connector 40 in the base 20 ; the electrical connector 40 is further electrically connected to the negative bus layer 32 .

Specifically, please refer to FIG. 2 together. In this embodiment, the single battery 10 is a cylindrical lithium battery, the positive terminal 101 serves as the positive pole of the single battery, and the negative terminal 102 and the casing 103 can be Integral structure and both serve as the negative electrode of the single battery. The clamping portion 104 is made of conductive metal material and includes a connecting portion 1041 and a head 1042 located at one end of the connecting portion 1041 . The connecting portion 1041 is cylindrical and one end is connected to the positive end 101 by welding or the like. Since the holding portion 1041 is made of conductive metal material and welded to the positive end, the holding portion 104 is a single body positive terminal of battery 10 . The head 1042 includes a circular end surface 1043 away from the positive end 101 , the circular end surface 1043 is coaxial with the connecting portion 1041 and has a larger diameter than the connecting portion 1041 .

The head portion 1042 also includes a first guide surface 1044 and a second guide surface 1045 between the connecting portion 1041 and the end surface 1043; The end surface 1043 is adjacent, and the other side is adjacent to the second guide surface 1045. The diameter of the first guide surface 1044 gradually increases from the end surface 1043 to the connecting portion 1041; the second guide surface 1045 is a cone The second guide surface 1045 has a platform shape and one side is adjacent to the first guiding surface 1044 , and the other side is adjacent to the connecting portion 1041 . The diameter of the second guiding surface 1045 gradually increases from the connecting portion 1041 to the end surface 1043 . The shell 103 is also pressed with an annular groove 105 at a position close to the positive end 101 .

The bases 20 are made of plastic through a molding process, and each base 20 is provided with a through hole 201. In this embodiment, the base 20 is in the shape of a hollow hexagonal column, and the corresponding through holes 201 are also Hexagonal columnar. One end of the base 20 extends toward the center of the through hole 201 to form a flange 202 . The inner edge of the flange 202 is circular, and the shape of the shell 103 of the unit battery 10 corresponds to the shape of the inner edge of the flange 202 .

The bus circuit board 30 may be a whole board. The clamping connectors 311 are distributed in a matrix on the positive bus layer 31 and are electrically connected to the positive bus layer 31 . The positive electrode bus layer 31 can be made of metal materials such as copper or aluminum. The upper and lower surfaces of the positive electrode bus layer 31 may be coated with an insulating material. The locking connector 311 includes a locking arm 312 surrounding and abutting against the locking portion 104 . The clamping arm 312 further includes an elastic section 3121 , a bent section 3122 and a contact section 3123 . One end of the elastic section 3121 is electrically connected to the positive bus layer 31 . The bent section 3122 extends from an end of the elastic section 3121 away from the positive bus layer 31 to the holding portion 104 , and the bent section 3122 forms an included angle with the elastic section 3121 . The contact section 3123 extends from an end of the bent section 3122 away from the elastic section 3121 to the elastic section 3121 , and the bent section 3122 forms an included angle with the contact section 3123 . The connection between the bent section 3122 and the contact section 3123 forms an abutting point 3124 , and the abutting point 3124 abuts against the second guiding surface 1045 and the connecting portion 1041 . In other implementations, the abutment point 3124 may only abut against the second guiding surface 1045 or the connecting portion 1041 . The locking arm 312 is substantially triangular.

Further, the positive electrode confluence layer 31 is provided with a positive electrode contact point 313 corresponding to the clamping connector 311, and one end of the elastic section 3121 is welded to the positive electrode contact point 313, so as to realize the confluence between the clamping arm 312 and the positive electrode. Electrical connection of layer 31.

It can be understood that, in other implementation manners, the clamping connecting member 311 is not limited to the structural form of the clamping arm 311 , for example, it may also be a clamping structure of a slide rail structure.

The negative electrode bus layer 32 may be a whole plate. The via holes 321 are distributed in a matrix on the negative bus layer 32 . The negative electrode bus layer 32 can be made of metal materials such as copper or aluminum. The upper and lower surfaces of the negative electrode bus layer 32 may be coated with insulating materials. A negative electrode contact point 322 surrounding the via hole 321 is disposed on the negative electrode bus layer. The clamping connectors 311 correspond to the via holes 321 one by one, and each clamping connector 311 is located in a corresponding via hole 321 .

Further, the bus circuit board 30 also includes an insulating layer 33 located between the positive bus layer 31 and the negative bus layer 32; the negative bus layer 32 and the insulating layer 33 jointly open the via hole 321.

The electrical connector 40 includes an arc-shaped main body 401 and a plurality of contact pins 402 extending from one side of the main body 401 . The diameter of the arc-shaped main portion 401 corresponds to the diameter of the inscribed circle of the through hole 201 of the base 201 . In this embodiment, the plurality of contact pins 402 are evenly arranged in an arc shape, and each contact pin 402 is elongated and its middle protrudes toward the central axis of the main body 401 to form an arc-shaped positioning portion 403 .

When assembling, install each electrical connector 40 into the through hole 201 from one end of the corresponding base 20 without the flange 202, wherein the main body 401 is against the flange 202, and then the base 20 It is disposed on the negative electrode bus layer 32 by glue or the like, and each base 20 corresponds to a via hole 321 , and the end of the contact pin 402 away from the main body 401 is electrically connected to the negative electrode contact point 322 . Then put the positive end 101 corresponding to a single battery 10 into a corresponding base 20 from the side of the flange 202, wherein the holding portion 104 is located in the corresponding through hole 321 and is held by the corresponding holding connector 311 The clamping; the contact pin 402 is in contact with the housing 103 , wherein the positioning portion 403 is located in the annular groove 105 and is in contact with the housing 103 . In other embodiments, the main body 401 is also in contact with the housing 103 .

When in use, all single batteries are connected in series and parallel through the bus circuit board to form a high-voltage battery pack for power supply of the power system. Assembled or separated from the bus circuit board by plugging and unplugging, the existing cable and screw structures are omitted, the structure is compact, and the use is more convenient and safe.

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 battery module, characterized in that: it includes a plurality of single cells, a base corresponding to the number of single cells, and a bus circuit board; each single cell includes a positive terminal, a negative terminal opposite to the positive terminal and a shell located between the positive terminal and the negative terminal, the positive terminal is provided with a clamping portion; the base is provided with electrical connectors; the bus circuit board includes a positive bus layer located on the positive bus layer The negative electrode confluence layer of the positive electrode confluence layer is provided with a plurality of clamping connectors, and the negative electrode confluence layer is provided with via holes corresponding to the clamping connectors one by one; the base is arranged on the negative electrode confluence layer, each The single battery is set outside the corresponding base and the holding part is located in the corresponding via hole and held by the corresponding holding connector, and the positive terminal is electrically connected to the positive bus layer through the holding part and the holding connector; The shell is connected to the corresponding electrical connector in the base; the electrical connector is further connected to the negative electrode bus layer. 2. The battery module according to claim 1, wherein the clamping portion includes a connecting portion and a head located at one end of the connecting portion; the connecting portion is cylindrical and one end is connected to the positive terminal, The head includes a circular end surface away from the positive end, the circular end surface is coaxial with the connecting portion and has a diameter larger than the connecting portion; The clamping arm outside the clamping part. 3. The battery module according to claim 2, wherein the head further comprises a first guiding surface and a second guiding surface located between the connecting portion and the end surface; the first guiding surface The surface is frustum-shaped and one side is adjacent to the end surface, and the other side is adjacent to the second guide surface, and the diameter of the first guide surface gradually increases from the end surface to the connecting part; the second guide surface The two guiding surfaces are frustum-shaped, one side is adjacent to the first guiding surface, and the other side is adjacent to the connecting portion, and the diameter of the second guiding surface gradually increases from the connecting portion to the end surface. 4. The battery module according to claim 3, wherein the clamping arm includes an elastic section, a bent section and a contact section; one end of the elastic section is electrically connected to the positive bus layer, and the The bent section extends from the end of the elastic section away from the positive electrode bus layer to the clamping part, and the bent section forms an angle with the elastic section; the contact section is away from the elastic section from the bent section One end of one end extends toward the elastic section; and the bent section forms an angle with the contact section, and the connection between the bent section and the contact section forms an abutment point, and the abutment point abuts against the contact section on the second guide surface and the connecting portion. 5 . The battery module according to claim 4 , wherein a positive electrode contact point is provided on the positive electrode bus layer, and one end of the elastic section is welded to the positive electrode contact point. 6. The battery module according to claim 1, wherein each base is provided with a through hole, and one end of the base extends toward the center of the through hole to form a flange; the electrical connector includes an arc-shaped main body and a plurality of contact pins extending from one side of the body; the electrical connection is accommodated in the through hole, the main body leans against the flange, and the contact pins are in contact with the shell. 7. The battery module according to claim 6, characterized in that: the shell is pressed with an annular groove, the plurality of contact feet are evenly spaced in an arc shape, and each contact foot is in the shape of a strip And the middle part protrudes toward the central axis of the main body to form an arc-shaped positioning part; the positioning part is located in the annular groove. 8 . The battery module according to claim 7 , wherein a negative electrode contact point is provided on the negative electrode bus layer, and the end of the contact leg away from the main body is further electrically connected to the negative electrode contact point . 9. The battery module according to claim 6, wherein the base is in the shape of a hexagonal column, the inner edge of the flange is circular, the single battery is cylindrical, and the single The shape of the casing of the battery corresponds to the shape of the inner edge of said flange. 10. The battery module according to claim 1, wherein the bus circuit board further comprises an insulating layer located between the positive bus layer and the negative bus layer; the negative bus layer and the The insulating layer jointly opens the via hole.