Electric connector, conductive heat exchange device and battery pack

Abstract

The utility model discloses an electric connecting piece, a conductive heat exchange device and a battery pack. The electric connecting piece is used for realizing series connection between adjacent single batteries in the battery pack; the electric connecting piece comprises a main body, and the main body is provided with a horizontal channel and two vertical channels; the horizontal channel is used for heat exchange and is isolated from the two vertical channels; and the two vertical channels are isolated from each other and are respectively used for being connected with the poles with different polarities of the two adjacent single batteries. According to the electric connecting piece disclosed by the utility model, the main body can be conveniently and fixedly connected to poles with different polarities in two adjacent single batteries by arranging the two vertical channels on the main body, the series connection between the two adjacent single batteries is realized, and meanwhile, as the horizontal channels are arranged on the electric connecting piece, the heat exchange medium can be directly introduced, so that the heat exchange efficiency is improved. Or a heat exchange tube which can be insulated from the main body is mounted, so that the heat exchange of the single battery pole can be realized, and the problem possibly caused by over-high temperature of the pole is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the battery field, concretely is a kind of electric connection, conductive heat exchange device and battery pack. BACKGROUND

[0002] At present, common battery pack (also can be called battery group or battery module) is all connected together by using electric connection to constitute multiple single batteries in series.

[0003] Temperature control of battery pack has been the hotspot of the field, when current is too large, it can lead to electric connection overheating, influence normal operation of battery pack;In addition, since the pole of single battery in large capacity battery is the most concentrated part of heat, when local heat of pole is too high, it can also lead to temperature of electric connection connected with it soaring, influence normal operation of battery pack. UTILITY MODEL CONTENTS

[0004] One aspect of the utility model is to provide an electric connection, by optimizing the structure of electric connection in existing series battery pack, not only realize the series connection between single batteries, but also solve the problem of local temperature of pole in single battery being too high.

[0005] The electric connection is used to realize the series connection between adjacent single batteries in battery pack;Its improvement lies in that:

[0006] Electric connection includes main body, and main body is provided with one horizontal passage and two vertical passages;Horizontal passage is used for heat exchange, and is isolated from two vertical passages;Two vertical passages are isolated from each other, and are respectively used for connecting with the pole of different polarity of two adjacent single batteries.

[0007] The electric connection of the utility model is fixedly connected on the pole of different polarity of two adjacent single batteries by being provided with two vertical passages on main body, realizes the series connection between two adjacent single batteries, and since horizontal passage is provided on the electric connection, heat exchange medium can be directly introduced, or heat exchange pipe, which can keep insulation with main body, is installed, so that heat exchange of single battery pole can be realized, the problem caused by temperature of pole being too high is avoided, and the safety of battery pack is ensured.

[0008] Further, the main body is in the shape of U as a whole, includes plate-shaped horizontal part and two columnar vertical parts, and one horizontal passage and one vertical passage isolated from horizontal passage are provided on each columnar vertical part. Plate-shaped horizontal part can compensate the height difference of top surface of pole of adjacent single battery by deforming itself, so that main body can be in close contact with pole.

[0009] Further, the thickness of plate-shaped horizontal part is 1 to 2 millimeters.

[0010] Further, compared with setting heat exchange pipes in horizontal channels, the heat exchange effect of directly injecting insulating heat exchange medium into horizontal channels is optimal, in order to make the horizontal channels of the two columnar vertical parts be communicated, therefore the utility model discloses a first insulating connecting pipe is arranged between the two horizontal channels.

[0011] Further, in order to facilitate assembly and the sealing between the two heat exchange channels, the first insulating connecting pipe is integrally formed between the two columnar vertical parts by injection molding.

[0012] Further, in order to make the electric connecting piece and the pole column be connected firmly, the vertical channel of the utility model is a blind hole, and the main body can be fixed on the pole column by fusion welding.

[0013] Further, an installation interface is arranged on the end port of the horizontal channel, and the installation interface can conveniently connect the two horizontal channels through the insulating connecting pipe.

[0014] Another aspect of the utility model provides a conductive heat exchange device which comprises a plurality of the electric connecting pieces, and each electric connecting piece is connected through a second insulating connecting pipe. When a battery pack is installed, the plurality of electric connecting pieces can be connected into an integral whole through the second insulating connecting pipe, then the conductive heat exchange device is placed above the battery group string of the battery pack as an integral whole, and finally the connection with the monomer battery pole column is realized, so that the assembly process is more reasonable, and the assembly time and cost are saved to a certain extent.

[0015] A third aspect of the utility model provides a battery pack which comprises a plurality of monomer batteries and the conductive heat exchange device.

[0016] The utility model has the advantages that:

[0017] The utility model optimizes the structure of the electric connecting piece, the main body can be fixedly connected to the pole columns of different polarities in two adjacent monomer batteries through the two vertical channels arranged on the electric connecting piece, and the series connection between the two adjacent monomer batteries is realized. In addition, the heat exchange of the monomer battery pole column can be realized through the direct input of heat exchange medium or the installation of heat exchange pipes which can keep insulation with the main body, the problems caused by the excessively high temperature of the pole column are avoided, and the safety of the battery pack is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structure schematic view of the electric connecting piece in embodiment 1;

[0019] Figure 2 It is a structure schematic view of the first electric connecting piece in embodiment 2;

[0020] Figure 3 It is a structure schematic view of the second electric connecting piece in embodiment 2;

[0021] Figure 4 Structure diagram of the battery pack in Embodiment 3;

[0022] Figure 5 Structure diagram of the conductive heat exchange device in Embodiment 3.

[0023] In the drawings, reference signs are:

[0024] 1-electric connection, 11-main body, 12-vertical channel, 13-horizontal channel, 14-plate-shaped horizontal part, 15-columnar vertical part, 16-mounting interface, 2-first insulating connecting pipe, 3-single battery, 4-conductive heat exchange device, 5-second insulating connecting pipe. DETAILED DESCRIPTION

[0025] In order to make the above objectives, characteristics and advantages of the present application more apparent, clear and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0026] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in other ways different from those described herein without departing from the scope of the present application, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0027] In the description of the present application, it should be noted that the orientation or position relationship of the terms "top, bottom, etc." indicated in the description is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does 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 cannot be understood as a limitation on the present application. In addition, the terms "first, second, third, fourth, etc." are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0028] The design idea of the present application is:

[0029] The sheet-shaped electric connecting piece of the existing series battery pack is optimized, thickened, two vertical channels are arranged on the main body of the electric connecting piece, the main body is fixedly connected to the pole columns with different polarities in two adjacent single batteries, the series connection between the two adjacent single batteries is realized, a horizontal channel is arranged on the electric connecting piece, the heat exchange medium can be directly introduced into the horizontal channel, or the heat exchange pipe which can be insulated from the main body is installed, the heat exchange of the pole column of the single battery is realized, the problems caused by the high temperature of the pole column are avoided, and the safety of the battery pack is ensured.

[0030] Embodiment 1

[0031] As shown in Figure 1 and Figure 4 In the embodiment, the electric connecting piece 1 is in a rectangular shape and is made of aluminum material, two vertical channels 12 which are isolated from each other are arranged on the main body 11 of the electric connecting piece 1, the two vertical channels 12 are respectively used for connecting the main body 11 and the pole columns of adjacent two single batteries, and a horizontal channel 13 which is isolated from the two vertical channels 12 is arranged on the main body 11, and the horizontal channel 13 is used for heat exchange.

[0032] In the embodiment, the vertical channel 12 has the following forms:

[0033] Form 1: the vertical channel 12 is a blind hole, and the main body 11 of the electric connecting piece is fixedly connected with the pole column of the single battery by means of laser fusion welding;

[0034] Form 2: the vertical channel 12 is a stepped hole, and the main body 11 of the electric connecting piece is fixedly connected with the pole column of the single battery by means of screw connection; compared with Form 1, the screw connection mode makes the connection between the main body of the electric connecting piece and the pole column less reliable.

[0035] In the embodiment, the horizontal channel 13 is a through hole; the insulating heat exchange medium can be directly introduced into the through hole, so that the insulating heat exchange medium directly contacts with the pole column to realize the heat exchange of the pole column; in other embodiments, a heat exchange pipe can be installed in the through hole, so that the heat exchange pipe is insulated from the pole column to realize the heat exchange; in some other embodiments, the horizontal channel is a groove, and the heat exchange pipe can be clamped in the groove, so that the heat exchange pipe is insulated from the pole column to realize the heat exchange.

[0036] Embodiment 2

[0037] As shown in Figure 2 and Figure 4As shown, in the embodiment, the electric connecting piece 1 is in U shape as a whole, is made of aluminum material, comprises a plate-shaped horizontal part 14 and two columnar vertical parts 15, one horizontal channel 13 and one vertical channel 12 isolated from the horizontal channel 13 are arranged on each columnar vertical part 15; the reason why the utility model is set to be in U shape is that the flexible deformation feature of the plate-shaped horizontal part 14 can make up for the height difference of the top surface of the adjacent single battery pole, so that the electric connecting piece can be in close contact with the pole. Preferably, the thickness of the plate-shaped horizontal part is 1 to 2 millimeters.

[0038] In the embodiment, the plate-shaped horizontal part 14 and the two columnar vertical parts 15 of the U-shaped electric connecting piece are formed in an integral manner; in some other embodiments, the plate-shaped horizontal part 14 and the two columnar vertical parts 15 are in a split structure and can be formed by welding or screw connection.

[0039] In the embodiment, the vertical channel has the following forms:

[0040] Form 1: the vertical channel 12 is a blind hole, and the main body of the electric connecting piece and the single battery pole can be fixedly connected by laser fusion welding;

[0041] Form 2: the vertical channel 12 is a stepped hole, and the main body of the electric connecting piece and the single battery pole can be fixedly connected by screw connection; compared with Form 1, the screw connection of the main body of the electric connecting piece and the pole has poor reliability.

[0042] In the embodiment, the horizontal channel 13 is a through hole; the insulating heat exchange medium can be directly introduced into the through hole, so that the insulating heat exchange medium directly contacts the pole to realize heat exchange of the pole; in order to make the through holes in the two columnar vertical parts 15 mutually through, a first insulating connecting pipe 2 is arranged between the two through holes, as shown. Figure 3 The two ends of the first insulating connecting pipe 2 can connect the two through holes by plug-in connection, or the first insulating connecting pipe 2 can be formed between the two columnar vertical parts 15 by injection molding;

[0043] In some other embodiments, the heat exchange pipe can also penetrate through the two through holes to ensure that the heat exchange pipe and the pole are insulated to realize heat exchange; in some other embodiments, the horizontal channel 13 is a groove, and the heat exchange pipe can be clamped in the groove to ensure that the heat exchange pipe and the pole are insulated to realize heat exchange.

[0044] Embodiment 3

[0045] As shown in Figure 4 and Figure 5As shown, the present embodiment provides a battery pack, which includes N single batteries 3 and a conductive heat exchange device 4. The N single batteries 3 constitute a battery string; the conductive heat exchange device 4 includes N-1 electric connectors 1 as described in Embodiment 1 and Embodiment 2, which are connected in series between adjacent single batteries 3, and each electric connector 1 is connected through a second insulating connecting pipe 5. In order to facilitate the connection between the second insulating connecting pipe 5 and the electric connector 1, an installation interface 16 is arranged on one end of the horizontal passage of each electric connector 1.

[0046] The assembly process of the battery pack is as follows:

[0047] Arrange N single batteries into a battery string;

[0048] Connect N-1 electric connectors through the second insulating connecting pipe to complete the assembly of the conductive heat exchange device;

[0049] Place the conductive heat exchange device on the battery string, and then weld and fix each electric connector to the pole of the adjacent two single batteries by welding.

[0050] Of course, in some other embodiments, it is also possible to consider placing N single batteries in sequence and installing N-1 electric connectors in sequence.

Claims

1. An electrical connector for realizing series connection between adjacent single cells in a battery pack, characterized in that: the electrical connector comprises a main body, the main body is provided with one horizontal channel and two vertical channels; the horizontal channel is used for heat exchange and is isolated from the two vertical channels; the two vertical channels are isolated from each other and are respectively used for connecting the pole columns of two adjacent single cells with different polarities. The main body is in the shape of a whole U, comprising a plate-shaped horizontal part and two columnar vertical parts, and each columnar vertical part is provided with one horizontal channel and one vertical channel isolated from the horizontal channel.

2. The electrical connection of claim 1, wherein: The thickness of the plate-shaped horizontal part is 1-2 mm.

3. An electrical connection as claimed in claim 2, characterised in that: A first insulating connecting pipe is arranged between the horizontal channels of the two columnar vertical parts.

4. An electrical connection as claimed in claim 3, characterised in that: The first insulating connecting pipe is integrally formed between the two columnar vertical parts by injection molding.

5. An electrical connection as claimed in claim 4, characterised in that: The vertical channel is a blind hole.

6. An electrical connection as claimed in any one of claims 1 to 5, characterised in that: An installation interface is arranged on one end port of the horizontal channel.

7. An electrical connection as claimed in claim 6, characterised in that: A plurality of electrical connectors as claimed in claim 1 are included, and each electrical connector is connected by a second insulating connecting pipe.

8. An electrically conductive heat exchange device, characterized by: A plurality of single cells and the conductive heat exchange device as claimed in claim 8 are included.

9. A battery pack, characterized by, ​

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