CN210805903U - Battery pack - Google Patents

Abstract

The utility model discloses a battery pack, including cooling plate, block terminal, battery module, battery case, wherein the block terminal contains the piece that converges, should converge the piece and include to the part heat dissipation part that exposes the block terminal, this heat dissipation part is connected with cooling plate heat conduction. The utility model discloses a subassembly heat radiation structure in battery package has reduced and has overflowed because of block terminal continuous operation, leads to the temperature to rise fast in the block terminal, and then produces because of the electric life-span of components and parts, accelerate the safety risk of reasons such as the ageing, the high pressure contact jaw internal resistance of plastic part increases.

Description

Battery pack

Technical Field

The utility model relates to a battery technology field, in particular to battery pack.

Background

In present conventional battery package, if the block terminal continuous operation overflows when, the temperature can rise fast in the block terminal, influence the electric life of components and parts (relay, pre-charge relay), and accelerate the ageing of plastic part (plastic part is ageing more easily under the high temperature environment), the internal resistance of high pressure contact tip also can increase, produce safe risk, its inside conflux copper bar temperature can exceed 80 ℃ when overflowing sometimes, consequently need consider the heat dissipation function of the copper bar that converges in the block terminal when designing, the copper bar that converges usually exposes in the block terminal now, dispel the heat to it through the circulation of air, its radiating effect can not reach expected effect.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery package aims at solving the high technical problem who influences the electrical life-span of components and parts and accelerate the plastic part is ageing of the high temperature of components and parts in the block terminal among the prior art.

In order to solve the technical problem, an embodiment of the present invention provides a battery pack, which includes a cooling plate, a distribution box, a battery module, and a battery case, wherein the distribution box includes a confluence piece; the bus bar includes a heat dissipating portion to partially expose the distribution box; the heat dissipation part is in heat conduction connection with the cooling plate.

Optionally, the panelboard includes a relay, a pre-charge resistor, a pre-charge relay, a fuse, a shunt, and a bus bar.

Optionally, the panelboard includes a battery management system.

Optionally, the bus bar is a bus bar copper bar or a bus bar aluminum bar.

Optionally, the electric box is provided with an opening through which the heat dissipation portion is exposed.

Optionally, the opening of the electrical box faces the cooling plate.

Optionally, a heat conducting insulating glue is arranged between the heat dissipation portion and the cooling plate, and the heat dissipation portion is in heat conducting connection with the cooling plate through the heat conducting insulating glue.

Alternatively, the cooling plate may be located above the battery module and the distribution box.

Optionally, the battery shell includes a battery tray, and the distribution box and the battery module are disposed on the battery tray.

Optionally, the block terminal sets up the tip at battery tray, the block terminal open-top exposes the piece that converges, the piece that converges is connected with liquid cooling plate heat conduction through heat conduction insulating cement, the liquid cooling plate sets up in block terminal and battery module top.

The utility model has the advantages that: the utility model discloses a battery pack through carrying out structural change to the block terminal, sets up the opening, with the interior piece that converges of block terminal barely expose and form the radiating part to make it be connected with cooling plate heat conduction, and the block terminal is fixed on the battery tray in battery case. Adopt this battery package structure, with the cooling plate with converge a heat conduction connection, improved the heat dissipation function that converges greatly, reduced because of converging a temperature rise and lead to the problem that components and parts electric life reduces, cover battery module and block terminal with the cooling plate simultaneously and not only avoided increasing battery package weight and also increased the utilization ratio of cooling plate because of increasing other components and parts.

Drawings

Fig. 1 is an exploded view of a battery pack according to an embodiment of the present invention.

Fig. 2 is the schematic diagram of the spatial position of the middle distribution box of the present invention.

Fig. 3 is an enlarged view of the area a in fig. 2.

Fig. 4 is a schematic diagram of the internal part of the distribution box of the utility model.

The reference numerals in the specification are as follows: 10. a cooling plate; 20. a distribution box; 30. a battery module; 40. a battery case; 401. a battery tray; 402. sealing the cover plate; 60. heat-conducting insulating glue; 201. a relay; 202. pre-charging a resistor; 203. a bus bar; 204. a pre-charging relay; 205. a fuse; 206. a flow divider.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

The utility model provides a battery pack, it contains cooling plate 10, block terminal 20, battery module 30 and battery case 40, and battery case 40 can contain battery tray 401 and sealed apron 402, and battery tray 401 is fixed on battery case 40. As shown in fig. 1, battery tray 401 is rectangular, distribution box 20 and battery module 30 are fixed on the upper surface in a bolt fastening or welding manner, distribution box 20 is placed at the end of battery tray 401, an opening is formed in the top of distribution box 20, bus bar 203 is exposed through the opening and is connected with cooling plate 10 through heat conduction insulating glue in a heat conduction manner, cooling plate 10 is arranged above distribution box 20 and battery module 30, and battery case 40 wraps all components to form a battery pack. The main function of the distribution box 20 is to distribute electric energy, wherein the distribution box 20 includes the bus bar 203, and the main purpose of the bus bar 203 is to conduct electricity out of the battery modules 30, so the bus bar 203 is usually in an overcurrent state, and therefore, the purpose of heat dissipation is achieved by connecting the bus bar 203 with the cooling plate 10 through the heat-conducting insulating glue 60 in a heat-conducting manner. The position of the cooling plate 10 is placed on the upper sides of the distribution box 20 and the battery modules 30 as shown in fig. 1, the position of the cooling plate 10 is not limited to the positional relationship in this embodiment, the position where the cooling plate 10 is placed can be adjusted according to the opening direction of the distribution box 20 and the position where the battery modules 30 are placed, and the cooling plate 10 is cooled by water. As shown in fig. 1, the battery case 40 of the battery pack includes a battery tray 401 and a sealing cover 402, the distribution box 20 is fixed to the battery tray 401 by welding or fastening with bolts, the battery tray 401 mainly functions to support and fix the battery module 30 and the distribution box 20, and the sealing cover 402 is placed on the cooling plate 10 and assembled with the battery tray 401 to form the battery case 40.

As shown in fig. 2, a layer of heat conductive insulating paste 60 is disposed on a contact area between the cooling plate 10 and the distribution box 20, and the cooling plate 10 is fastened to the battery module 30 and the distribution box 20 by bolts and has an area to cover the battery module 30 and the distribution box 20. The distribution box 20 is provided with an opening, the opening direction of which is consistent with the direction of the cooling plate 10, that is, the opening direction of the distribution box 20 is towards the liquid cooling plate 10, the opening is arranged to expose the bus bar piece 203 and make the bus bar piece connected with the cooling plate 10 in a heat conduction mode through the heat conduction insulating glue 60, and the part of the bus bar piece 203, which is exposed and is contacted with the cooling plate 10, can be regarded as a heat dissipation part. The heat conducting insulating glue 60 is located between the distribution box 20 and the cooling plate 10, and the area of the heat conducting insulating glue 60 can be the same as the opening area of the distribution box 20, or larger than the opening area of the distribution box 20, and the function of the heat conducting insulating glue is to expose the bus bar piece 203 to partially and completely cover the exposed part of the bus bar piece 203 and the cooling plate 10, so as to ensure the bus bar piece 203 to be insulated and heat conducting, and simultaneously prevent the water vapor generated by the cooling plate 10 from polluting the bus bar piece 203. In some embodiments, the cooling plate 10 and the bus bar 203 may be insulated by adding a heat conductive adhesive therebetween. For the following embodiments, there are many choices for the heat conducting and insulating glue 60, as long as a material satisfying both the heat conducting and insulating properties can be used as the heat conducting and insulating glue 60, and generally, the heat conducting and insulating glue 60 is chosen as an insulating glue of a silicon substrate material, and the description of the heat conducting and insulating glue 60 can be replaced by other words as long as both the properties (heat conducting and insulating) of the heat conducting and insulating glue 60 can be considered as one of the heat conducting and insulating glue 60, for example, the silicon substrate glue (a silicon substrate material satisfies both the heat conducting and insulating properties and thus can be used to replace the heat conducting and insulating glue 60). As shown in fig. 2, the position of the bus bar 203 and other related components is located in the middle of the distribution box 20, and the battery management systems are generally located on both sides, and the battery management systems are generally located in the low-voltage portion of the whole battery pack, and the heat generated by the battery management systems is not large, so that the heat can be dissipated through air circulation, but in this embodiment, the cooling plate 10 also covers the battery management systems in the distribution box 20, and the cooling plate 10 also dissipates the heat of the battery management systems on both sides of the distribution box 20.

As shown in fig. 3, the opening of the distribution box 20 exposes the bus bar 203, so that the bus bar 203 is thermally connected to the cooling plate 10 through the thermally conductive insulating paste 60. The bus bar 203 may be made of a metal having a good electrical conductivity, such as copper, aluminum, etc., and thus, when describing the bus bar 203, it may be replaced with an aluminum bar, a copper bar, etc., and further, since the bus bar 203 functions to conduct current, it may also be described as using a conductive sheet, a conductive member, etc. The contact between the bus bar 203 and the cooling plate 10 is thermally connected by the thermally conductive insulating paste 60, which is defined as the connection between the two components for heat transfer.

As shown in fig. 4, the internal structure of the distribution box 20 includes a relay 201, a pre-charge resistor 202, a bus member 203, a pre-charge relay 204, a fuse 205, and a shunt 206. The main heating element in the distribution box 20 comprises a relay 201, a pre-charging resistor 202, a bus bar piece 203, a fuse 205 and a pre-charging relay 204, the bus bar piece 203 is in contact with the cooling plate 10 through the heat conduction insulating glue 60, the temperature of the bus bar piece 203 is reduced, the temperature of the relay 201 and the temperature of the fuse 205 are further influenced, and the safety inside the distribution box 20 is guaranteed. In particular, the components inside the distribution box 20 are not limited to the above-described components.

As shown in fig. 1 to 4, the cooling plate 10 has a whole heat dissipation function in the whole battery pack, and the use of the heat conductive insulating paste 60 enables the cooling plate 10 to play a role in ensuring the performance safety of components in the interaction of the distribution box 20, thereby avoiding adverse effects caused by contact, and the heat dissipation function of the bus bar 203 is greatly improved by connecting the bus bar 203 with the cooling plate 10 through the heat conductive insulating paste 60. In addition, the safety of the components in the whole battery pack is ensured by fixing the distribution box 20 and the battery module 30 on the battery tray 401.

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 or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. 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 description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. A battery pack comprises a cooling plate, a distribution box, a battery module and a battery shell, and is characterized in that the distribution box comprises a confluence piece; the bus bar includes a heat dissipating portion to partially expose the distribution box; the heat dissipation part is in heat conduction connection with the cooling plate.

2. The battery pack of claim 1, wherein the power distribution box includes a relay, a pre-charge resistor, a pre-charge relay, a fuse, a shunt, and a bus bar.

3. The battery pack of claim 2, wherein the panelboard includes a battery management system.

4. The battery pack of claim 1, wherein the bus bar is a bus bar copper bar or a bus bar aluminum bar.

5. The battery pack according to claim 1, wherein the electric box is provided with an opening through which the heat dissipation portion is exposed to the electric box.

6. The battery pack of claim 1, wherein the opening of the electrical box faces the cooling plate.

7. The battery pack according to claim 1, wherein a heat conductive insulating paste is provided between the heat dissipation portion and the cooling plate, and the heat dissipation portion is thermally connected to the cooling plate through the heat conductive insulating paste.

8. The battery pack of claim 1, wherein the cooling plate is positionable over the battery modules and the electrical box.

9. The battery pack of claim 1, wherein the battery housing includes a battery tray, and the electrical box and the battery module are disposed on the battery tray.

10. The battery pack of claim 1, wherein the distribution box is disposed at an end of the battery tray, the top opening of the distribution box exposes a bus bar, the bus bar is thermally connected to the liquid cooling plate through a thermally conductive insulating adhesive, and the liquid cooling plate is disposed above the distribution box and the battery module.

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