CN214123962U

CN214123962U - Battery package and new forms of energy vehicle

Info

Publication number: CN214123962U
Application number: CN202022818793.1U
Authority: CN
Inventors: 伍星驰; 谈际刚; 马爱国
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-09-03
Anticipated expiration: 2030-11-30

Abstract

The utility model provides a battery pack, include: group battery, cooling plate, heat dissipation base and collector of constituteing by a plurality of electric cores, wherein, the upper surface of group battery with the lower surface contact of cooling plate, the upper surface of cooling plate with the lower surface contact of heat dissipation base, the collector is including the balanced branch road that is used for balanced group battery to discharge, balanced branch road sets up the lower surface of collector, balanced branch road with the upper surface contact of heat dissipation base, the heat process of balanced branch road the heat dissipation base transmits the cooling plate, the cooling plate is right the group battery with balanced branch road dispels the heat. The utility model also provides a new forms of energy vehicle.

Description

Battery package and new forms of energy vehicle

Technical Field

The utility model relates to a battery field, in particular to battery package and new forms of energy vehicle.

Background

With the continuous development of science and technology, new energy vehicles are gradually entering every family as a tool for riding instead of walk, and batteries are the most critical components in the use process of the new energy vehicles. After the battery is used for a long time, the available capacity of the battery is reduced due to inconsistent self-discharge of the battery, so that the battery equalization technology is required.

When the battery is balanced, heat is generated, and the conventional temperature adjusting method reduces the balance current to realize cooling, so that the balance capability of a balance system is reduced; secondly, the balance circuit is cooled by a cooling fan, but the scheme is greatly influenced by the environment, particularly the power battery is in safety consideration, and a dustproof and waterproof airtight design scheme is generally adopted, so that the air convection of the installation environment of the battery information collector is limited, and the cooling effect is poor.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide a battery pack to solve the above-mentioned problems.

In order to achieve the above object, the utility model provides a battery pack, include: group battery, cooling plate, heat dissipation base and collector of constituteing by a plurality of electric cores, wherein, the upper surface of group battery with the lower surface contact of cooling plate, the upper surface of cooling plate with the lower surface contact of heat dissipation base, the collector is including the balanced branch road that is used for balanced group battery to discharge, balanced branch road sets up the lower surface of collector, balanced branch road with the upper surface contact of heat dissipation base, the heat process of balanced branch road the heat dissipation base transmits the cooling plate, the cooling plate is right the group battery with balanced branch road dispels the heat.

According to the utility model discloses a battery package, a cooling plate is shared with the group battery to balanced branch road, need not reduce balanced electric current and can realize the heat dissipation, can keep the balanced ability of balanced branch road, need not additionally set up heat abstractor, has improved the utilization ratio of battery thermal management, and the space accounts for than little, and temperature regulation ability is strong.

Furthermore, the number of the equalization branches is the same as that of the battery cores, one battery core is correspondingly connected with one equalization branch, and the equalization branches are connected with the positive electrode and the negative electrode of the corresponding battery core.

Further, one equalizing branch comprises an equalizing resistor and an equalizing switch which are connected in series.

Further, one equalizing branch comprises two auxiliary branches connected in parallel, and each auxiliary branch comprises an equalizing resistor and an equalizing switch connected in series.

Furthermore, one equalizing branch comprises an equalizing resistor and an equalizing switch which are connected in series, two bridging switches are connected between every two adjacent equalizing branches, one end of a first equalizing switch in the first equalizing branch is connected with the first equalizing resistor, the other end of the first equalizing switch is connected with a first battery cell, one end of a second equalizing switch in the second equalizing branch is connected with the second equalizing resistor, the other end of the second equalizing switch is connected with a second battery cell, one end of the first equalizing switch is connected with the other end of the second equalizing switch through the first bridging switch, and the other end of the first equalizing switch is connected with one end of the second equalizing switch through the second bridging switch.

Further, a water outlet and a water inlet of the cooling plate are connected with a water pump and a heat exchanger in series through pipelines.

Further, the heat exchanger is connected with a vehicle-mounted air conditioner.

Further, the upper surface and the lower surface of the cooling plate are provided with heat conducting pads.

Further, still include the shell, the shell will including group battery, cooling plate, heat dissipation base parcel, the collector sets up outside the shell, the collector passes through the opening and the heat dissipation base of shell and is connected, the collector passes through fastening structure to be fixed on the shell.

The utility model also provides a new forms of energy vehicle, including foretell battery package.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic cross-sectional view of a battery pack according to the present invention;

fig. 2 is a schematic structural view of a battery pack according to the present invention;

fig. 3 is a circuit diagram of an equalizing branch according to a first embodiment of the present invention;

fig. 4 is a circuit diagram of an equalizing branch according to a second embodiment of the present invention;

fig. 5 is a circuit diagram of an equalizing branch according to a third embodiment of the present invention.

The reference numerals in the specification are as follows:

100. a battery pack; 200 cooling plates; 201. a first thermally conductive pad; 202. a second thermally conductive pad; 300. a heat dissipation base plate; 400. a collector; 500. a housing; 501. a fastener; 600. a pipeline; 700. a water pump; 800. a heat exchanger; 900. vehicle air conditioner.

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 by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," "connecting," and "connecting" are used in a broad sense, and may be, for example, mechanically or electrically connected, or may be connected internally to two elements, directly or indirectly through an intermediate medium, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.

These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited correspondingly. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.

As shown in fig. 1-2, in an embodiment of the present invention, a battery pack includes: group battery 100, cooling plate 200, heat dissipation base 300 and collector 400 of constituteing by a plurality of electric cores, the upper surface of group battery 100 with the lower surface contact of cooling plate 200, the upper surface of cooling plate 200 with the lower surface contact of heat dissipation base 300, the collector is including the balanced branch road that is used for balanced group battery to discharge, balanced branch road sets up the lower surface of collector 400, balanced branch road with the upper surface contact of heat dissipation base 200, the heat process of balanced branch road heat dissipation base 300 transmits to cooling plate 200, cooling plate 200 is right group battery 100 with balanced branch road dispels the heat. The number of the equalizing branches is the same as that of the battery cores, one battery core is correspondingly connected with one equalizing branch, and the equalizing branches are connected with the positive pole and the negative pole corresponding to the battery cores. The collector 400 is configured to collect temperature and voltage information of each cell, and temperature information of each balancing branch. A battery manager (not shown in the figure) receives the information collected by the collector 400, and controls the on/off of each equalization branch according to the information.

As shown in fig. 2, the water outlet and the water inlet of the cooling plate 200 are connected in series with a water pump 700 and a heat exchanger 800 through a pipe 600, and the heat exchanger 800 is connected with a vehicle air conditioner 900. In some embodiments of the present invention, the water outlet of the cooling plate 200 is connected to the water pump 700 through a pipeline, the water pump 700 is connected to the heat exchanger 800, and the heat exchanger 800 is connected to the water inlet of the cooling plate 200; in other embodiments of the present invention, the water outlet of the cooling plate 200 is connected to the heat exchanger 800 through a pipe, the heat exchanger 800 is connected to the water pump 700, and the water pump 700 is connected to the water inlet of the cooling plate 200. The water pump 700 is used to drive the coolant to circulate in the cooling plate 200. The battery manager controls the water pump to be turned on or off and the pressure of the water pump according to the information collected by the collector 400. The heat exchanger 800 is used for dissipating heat in the cooling liquid, and the heat exchanger 800 and the vehicle-mounted air conditioner 900 share one set of heat exchange system, so that the space of the vehicle is saved, and the weight is reduced.

Further, the upper surface and the lower surface of the cooling plate 200 are provided with heat conduction pads, the lower surface of the cooling plate 200 is in contact with the upper surface of the battery pack 100 through a first heat conduction pad 201, and the upper surface of the cooling plate 200 is in contact with the lower surface of the heat dissipation base 300 through a second heat conduction pad 202. The heat conducting pad can make the temperature more uniformly and quickly transferred.

In the first embodiment of the present invention, as shown in fig. 3, one of the equalizing branches includes an equalizing resistor and an equalizing switch connected in series. Specifically, taking an example that a group of battery packs 100 includes 4 battery cells, that is, there are 4 equalizing branches, the first equalizing branch includes a first equalizing switch K1 and a first equalizing resistor R1 connected in series, the second equalizing branch includes a second equalizing switch K2 and a second equalizing resistor R2 connected in series, the third equalizing branch includes a third equalizing switch K3 and a third equalizing resistor R3 connected in series, and the fourth equalizing branch includes a fourth equalizing switch K4 and a fourth equalizing resistor R4 connected in series.

In the second embodiment of the present invention, as shown in fig. 4, one of the equalizing branches includes two parallel-connected auxiliary branches, and each of the auxiliary branches includes an equalizing resistor and an equalizing switch connected in series. Specifically, taking an example that a group of battery packs 100 includes 4 battery cells, that is, there are 4 equalizing branches, where a first equalizing branch includes a first auxiliary branch and a second auxiliary branch connected in parallel, the first auxiliary branch includes a first equalizing resistor R1 and a first equalizing switch K1 connected in series, and the second auxiliary branch includes a second equalizing resistor R2 and a second equalizing switch K2 connected in series; the second equalizing branch comprises a third auxiliary branch and a fourth auxiliary branch which are connected in parallel, the third auxiliary branch comprises a third equalizing resistor R3 and a third equalizing switch K3 which are connected in series, and the fourth auxiliary branch comprises a fourth equalizing resistor R4 and a fourth equalizing switch K4 which are connected in series; the third equalizing branch comprises a fifth auxiliary branch and a sixth auxiliary branch which are connected in parallel, the fifth auxiliary branch comprises a fifth equalizing resistor R5 and a fifth equalizing switch K5 which are connected in series, and the sixth auxiliary branch comprises a sixth equalizing resistor R6 and a sixth equalizing switch K6 which are connected in series; the fourth equalizing branch comprises a seventh auxiliary branch and an eighth auxiliary branch which are connected in parallel, the seventh auxiliary branch comprises a seventh equalizing resistor R7 and a seventh equalizing switch K7 which are connected in series, and the eighth auxiliary branch comprises an eighth equalizing resistor R8 and an eighth equalizing switch K8 which are connected in series. In the embodiment, each balancing branch has two auxiliary branches which can work, so that the battery balancing capacity is improved.

In the third embodiment of the present invention, as shown in fig. 5, one equalizing branch includes an equalizing resistor and an equalizing switch connected in series, and every two are adjacent to each other, two cross-over switches are connected between the equalizing branches, a first equalizing resistor is connected to one end of a first equalizing switch in the first equalizing branch, a first electrical core is connected to the other end of the first equalizing switch, a second equalizing resistor is connected to one end of a second equalizing switch in the second equalizing branch, a second electrical core is connected to the other end of the second equalizing switch, one end of the first equalizing switch is connected to the other end of the second equalizing switch through the first cross-over switch, and the other end of the first equalizing switch is connected to one end of the second equalizing switch through the second cross-over switch.

Specifically, taking an example that a group of battery packs 100 includes 4 battery cells, that is, there are 4 equalizing branches, where the first equalizing branch includes a first equalizing switch K1 and a first equalizing resistor R1 connected in series, the second equalizing branch includes a second equalizing switch K2 and a second equalizing resistor R2 connected in series, one end of the first equalizing switch K1 is connected to the first equalizing resistor R1, the other end of the first equalizing switch K1 is connected to an electrode of the first battery cell, one end of the second equalizing switch K2 is connected to the second equalizing resistor R2, the other end of the second equalizing switch K2 is connected to an electrode of the second battery cell, one end of the first equalizing switch K1 is connected to the other end of the second equalizing switch K2 through a first cross-over switch Ka1, and the other end of the first equalizing switch K1 is connected to one end of the second equalizing switch K2 through a second cross-over switch Ka 2; the third equalizing branch comprises a third equalizing switch K3 and a third equalizing resistor R3 which are connected in series, the fourth equalizing branch comprises a fourth equalizing switch K4 and a fourth equalizing resistor R4 which are connected in series, one end of the third equalizing switch K3 is connected with the third equalizing resistor R3, the other end of the third equalizing switch K3 is connected with an electrode of a third battery cell, one end of the fourth equalizing switch K4 is connected with the fourth equalizing resistor R4, the other end of the fourth equalizing switch K4 is connected with an electrode of a fourth battery cell, one end of the third equalizing switch K3 is connected with the other end of the fourth equalizing switch K4 through a third bridging switch Ka3, and the other end of the third equalizing switch K3 is connected with one end of the fourth equalizing switch K4 through a fourth bridging switch Ka 4. In this embodiment, by opening and closing the cross-over switch, one or two balancing resistors in one balancing branch can participate in balancing, and the balancing capability of the battery can be improved.

Through the mode, the equalizing branch and the battery pack in the battery pack share one set of heat dissipation system, the utilization rate of battery heat management is improved, the space occupation ratio is small, and the temperature regulation capacity is strong.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all of which utilize the equivalent structure or equivalent flow transformation made by the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, all included in the same way in the patent protection scope of the present invention.

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 do not necessarily 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.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A battery pack, comprising: group battery, cooling plate, heat dissipation base and collector of constituteing by a plurality of electric cores, its characterized in that, the upper surface of group battery with the lower surface contact of cooling plate, the upper surface of cooling plate with the lower surface contact of heat dissipation base, the collector is including the balanced branch road that is used for balanced group battery to discharge, balanced branch road sets up the lower surface of collector, balanced branch road with the upper surface contact of heat dissipation base, the heat process of balanced branch road the heat dissipation base transmits the cooling plate, the cooling plate is right the group battery with balanced branch road dispels the heat.

2. The battery pack according to claim 1, wherein the number of the equalizing branches is the same as the number of the cells, one of the cells is correspondingly connected to one of the equalizing branches, and the equalizing branches are connected to the positive electrode and the negative electrode of the corresponding cell.

3. The battery pack of claim 2, wherein one of the equalization branches comprises an equalization resistor and an equalization switch connected in series.

4. The battery pack of claim 2, wherein one of the equalization branches comprises two sub-branches connected in parallel, each sub-branch comprising an equalization resistor and an equalization switch connected in series.

5. The battery pack according to claim 2, wherein one of the balancing branches includes a balancing resistor and a balancing switch connected in series, two bridging switches are bridged between every two adjacent balancing branches, one end of a first balancing switch in the first balancing branch is connected to the first balancing resistor, the other end of the first balancing switch is connected to the first battery cell, one end of a second balancing switch in the second balancing branch is connected to the second balancing resistor, the other end of the second balancing switch is connected to the second battery cell, one end of the first balancing switch is connected to the other end of the second balancing switch through the first bridging switch, and the other end of the first balancing switch is connected to one end of the second balancing switch through the second bridging switch.

6. The battery pack according to claim 1, wherein the water outlet and the water inlet of the cooling plate are connected in series with a water pump and a heat exchanger through pipes.

7. The battery pack of claim 6, wherein the heat exchanger is connected to an on-board air conditioner.

8. The battery pack according to claim 1, wherein the upper and lower surfaces of the cooling plate are provided with heat conductive pads.

9. The battery pack of claim 1, further comprising a housing, wherein the housing encloses the battery pack, the cooling plate, and the heat dissipation base, the collector is disposed outside the housing, the collector is connected to the heat dissipation base through an opening of the housing, and the collector is fixed to the housing through a fastening structure.

10. A new energy vehicle, characterized by comprising the battery pack according to any one of claims 1 to 9.