CN219393448U - Battery pack and electric equipment - Google Patents

Abstract

The utility model discloses a battery pack and electric equipment, wherein the battery pack comprises two battery modules which are arranged up and down, the two battery modules are respectively a 48V battery module and a 12V battery module, the battery module positioned below comprises a first battery, and the first battery is provided with a first weak part facing the battery module positioned above. Compared with the 48V light mixing system and the 12V light mixing system which are independently arranged in the prior art, the 48V light mixing system and the 12V light mixing system have the advantages that the 48V battery module and the 12V battery module are integrated in one battery pack, the overall size of the 48V light mixing system and the 12V light mixing system is obviously reduced, and meanwhile, the production cost is also reduced. The electric equipment comprises the battery pack, and the volume of the battery pack is small, so that the occupied volume of the battery pack is small, the integration level of other parts in the electric equipment is improved, and the space utilization rate of the electric equipment is improved.

Description

Battery pack and electric equipment

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery pack and electric equipment.

Background

The light hybrid system is a power system of a light hybrid electric vehicle, and is mainly composed of a group of low-voltage small-capacity batteries, a low-power motor and other related electric control elements compared with the traditional hybrid system. Because of the limitation of battery capacity and motor power, the light hybrid system generally does not support a pure electric driving function, but can assist an engine to provide auxiliary power under the working conditions of starting and stopping the engine, sliding a vehicle and the like, so that the working efficiency of the engine is optimized, the driving oil consumption is improved, the stable transition of the driving state is realized, and the response performance of the whole vehicle is improved.

In recent years, with the development of technology and the improvement of living standard of people, a light-mixing system of a light-mixed power automobile has been developed from a 12V light-mixing system to a 48V light-mixing system. The 48V light mixing system is not directly used for replacing the 12V light mixing system, but is overlapped with the 48V light mixing system on the basis of the original 12V light mixing system. The 12V light mixing system has the main function of improving the driving comfort, and the 48V light mixing system can not only improve the driving comfort, but also obviously improve the fuel economy, so that the system is favored by various automobile manufacturers.

However, the two systems of the 48V light mixing system and the 12V light mixing system of the common light hybrid electric vehicle are separately arranged, the size is large, the space utilization rate of the vehicle and the integration level of parts in the vehicle are obviously reduced, and the cost is obviously increased by separately arranging the two systems.

Disclosure of Invention

In order to solve the above-mentioned drawbacks in the prior art, one of the purposes of the present utility model is to provide a battery pack having the advantages of small size, high integration level and low cost.

In order to solve the above-mentioned defect in the prior art, the second object of the present utility model is to provide an electric device, which has the advantages of high integration level of parts and high space utilization.

According to one of the purposes of the utility model, the technical scheme is as follows:

a battery pack, comprising: the battery module comprises a first battery, wherein the first battery is provided with a first weak part facing the battery module located above.

Compared with the 48V light mixing system and the 12V light mixing system which are independently arranged in the prior art, the 48V light mixing system and the 12V light mixing system have the advantages that the 48V battery module and the 12V battery module are integrated in one battery pack, the overall size of the 48V light mixing system and the 12V light mixing system is obviously reduced, and meanwhile, the production cost is also reduced.

The technical scheme provided by the second purpose of the utility model is as follows:

an electric device comprises the battery pack.

Because the battery pack has smaller volume, the battery pack occupies small volume in the electric equipment, improves the integration level of other parts in the electric equipment, and improves the space utilization rate of the electric equipment.

Drawings

Fig. 1 is a schematic view of a battery pack according to an embodiment;

fig. 2 is a partially exploded view of a battery pack according to an embodiment;

FIG. 3 is a schematic view of the structure of the case in the embodiment;

fig. 4 is a schematic structural view of a 48V battery module according to an embodiment;

fig. 5 is a schematic structural view of a 12V battery module according to an embodiment;

fig. 6 is an exploded view of a battery pack according to an embodiment;

fig. 7 is a schematic view of an electrical component mounting structure in an embodiment.

Wherein the reference numerals have the following meanings:

1. a case; 11. a bottom plate; 12. a side plate; 13. lifting lugs; 2. a 48V battery module; 21. a first battery; 22. a first weak portion; 23. a first positive electrode post; 24. a first negative electrode post; 3. a 12V battery module; 31. a first battery pack; 32. a second battery pack; 33. a housing; 34. a second battery; 35. a second weak portion; 36. a second positive electrode post; 37. a second negative electrode post; 38. an upper cover; 39. a lower plate; 4. a first insulating support; 41. a 12V output positive electrode; 42. a 48V output positive electrode; 43. a 12V-48V output cathode; 44. a relay; 5. a second insulating support; 51. a conductive bar; 52. a repeater; 6. a busbar; 7. a 12V harness; 8. 48V harness.

Detailed Description

For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

The embodiment discloses a battery pack for a mild hybrid vehicle, referring to fig. 2, the X direction is the length direction of the battery pack, the left end is "left", the right end is "right", the Y direction is the thickness direction of the battery pack, the front end is "front", the rear end is "rear", the Z direction is the height direction of the battery pack, and the upper end is "upper" and the lower end is "lower" in the Z direction. Referring to fig. 1 and 2, the battery pack includes a case 1, 48V battery modules 2 and 12V battery modules 3, the 48V battery modules 2 and 12V battery modules 3 are fixedly disposed in the case 1, the 48V battery modules 2 and 12V battery modules 3 are disposed up and down, and the 12V battery modules 3 are disposed above the 48V battery modules 2. In the embodiment, the 48V battery modules 2 and 12V battery modules 3 are arranged up and down, and the 48V battery modules 2 and 12V battery modules 3 are integrated in one battery pack, compared with the technical scheme that the 48V light mixing system and the 12V light mixing system are independently arranged in the prior art, the overall volume of the 48V light mixing system and the 12V light mixing system is obviously reduced, so that the battery pack occupies a small space, and the functions of the 48V light mixing system and the 12V light mixing system can be fully exerted; moreover, since the 48V battery module 2 and the 12V battery module 3 are integrated in one battery pack, the production cost of the battery pack of the embodiment is significantly reduced compared with the technical scheme that the 48V light-mixing system and the 12V light-mixing system are independently arranged.

Referring to fig. 2 and 4, the 48V battery module 2 includes a plurality of first batteries 21, and the plurality of first batteries 21 are sequentially stacked in a length direction to form the 48V battery module 2. In the first battery 21 of the present embodiment, a square battery is taken as an example, and two opposite sides with the largest surface area of the first battery 21 are large surfaces, and when a plurality of first batteries 21 are stacked, the large surfaces of the first batteries 21 are arranged in sequence. Specifically, the first cells 21 of the present embodiment are provided with twelve, twelve first cells 21 are sequentially connected in series to form the 48V battery module 2, and the twelve first cells 21 are provided with the first positive electrode post 23, the first negative electrode post 24, and the first weak portion 22, the first positive electrode post 23 and the first negative electrode post 24 being used to electrically connect the first cells 21 with external conductors, bus bars, or the like. The first weak portion 22 is generally an explosion-proof valve of the first battery 21, and when the gas pressure in the first battery 21 is too high, the explosion-proof valve is exploded to release the pressure of the first battery 21, so as to prevent the first battery 21 from expanding in a thermal runaway manner to cause a safety accident. Alternatively, the first weak portion 22 is a metal sheet with a certain thickness after electrolysis loss, and the structures of the first weak portion 22 are various, not only are set according to practical requirements, but also the purpose of the first weak portion 22 is to release the pressure of the first battery 21 that expands in thermal runaway no matter what the structure of the first weak portion 22 is.

In the present embodiment, the first positive electrode post 23, the first negative electrode post 24, and the first weak portion 22 are all provided at the top of the first battery 21, and the first weak portion 22 is provided toward the 12V battery module 3, the first weak portion 22 may be provided between the first positive electrode post 23 and the first negative electrode post 24, or the first weak portion 22 may be provided at a position near the end of the top of the first battery 21, as long as the first weak portion 22 is provided toward the 12V battery module 3. In this embodiment, by arranging the first weak portion 22 towards the 12V battery module 3, when the first battery 21 is out of control, the first weak portion 22 is flushed away by the high Wen Wuzhi in the first battery 21, so that the explosion of the first weak portion 22 can be blocked by the 12V battery module 3, and the high-temperature substances are prevented from being sprayed to the electrical components above the battery pack, the passenger cabin of the automobile, and the like, so that the safety is ensured.

Further, in the embodiment, the gap between the 12V battery module 3 and the 48V battery module 2 is set, that is, the 12V battery module 3 is located above the 48V battery module 2, and a certain distance exists between the two, so that when the first battery 21 in the 48V battery module 2 is out of control, the high-temperature substances in the first battery 21 can smoothly rush out of the first weak portion 22 to burst.

Referring to fig. 2, the 12V battery module 3 of the present embodiment includes at least two battery packs, and the at least two battery packs are arranged above the 48V battery module 2 at intervals along the length direction, and the distance between the battery pack located in the middle and the 48V battery module 2 is smaller than the distance between the battery pack located in other positions (i.e., not in the middle) and the 48V battery module 2 along the length direction. Since in a battery module, the middle unit cell is easier to thermally run away than the end unit cell, in this embodiment, the distance between the middle battery pack and the 48V battery module 2 is smaller, when the first battery 21 in the middle of the 48V battery module 2 is thermally run away, the high-temperature gas and high-temperature substances in the first battery 2 can rapidly diffuse around after the first weak portion 22 is flushed away, so as to avoid thermal runaway of other unit cells in the 12V battery module 3 and the 48V battery module 2 caused by accumulation of the high-temperature gas and high-temperature substances. In addition, as the high-temperature gas and the high-temperature substances are rapidly diffused to the periphery, the average high-temperature gas and the high-temperature substances in each direction are obviously reduced, and the temperature can be rapidly reduced, so that the influence on the single battery on the periphery is avoided. Specifically, referring to fig. 5, the 12V battery module 3 of the present embodiment includes two battery packs, a first battery pack 31 located at the left side and a second battery pack 32 located at the middle side, respectively, in the length direction, and the interval between the second battery pack 32 and the 48V battery module 2 is smaller than the interval between the first battery pack 31 and the 48V battery module 2.

Referring to fig. 6, each of the first battery pack 31 and the second battery pack 32 includes a case 33 and at least two second batteries 34 provided in the case 33, the at least two second batteries 34 being stacked one above the other. In the embodiment, the second battery 34 is exemplified by a square battery, two opposite sides with the largest surface area of the second battery 34 are large surfaces, and when at least two second batteries 34 are stacked up and down, the large surfaces of the second batteries 34 are arranged in sequence and face the first weak portion 22 of the 48V battery module 2, so that high-temperature substances erupted from the first weak portion 22 are better blocked, and damage to electrical components and influence on safety of passengers are avoided.

Specifically, when the first cells 21 and the second cells 34 employ the same single cells, the number of the second cells 34 is smaller than the number of the first cells 21, and the first cell group 31 and the second cell group 32 each include two second cells 34 arranged in a vertically stacked manner, whereby the 12V battery module 3 of the present embodiment includes four second cells 34, and the four second cells 34 are connected in a 1P4S manner to form the 12V battery module 3. The second battery 34 is provided with a second positive electrode post 36, a second negative electrode post 37, and a second weak portion 35, the second positive electrode post 36 and the second negative electrode post 37 being for electrically connecting the second battery 34 with an external conductor, a bus bar, or the like. The second weak portion 35 is generally an explosion-proof valve of the second battery 34, and when the gas pressure in the second battery 34 is too high, the explosion-proof valve is exploded to release the pressure of the second battery 34, so as to prevent the second battery 34 from expanding in a thermal runaway manner to cause a safety accident. Alternatively, the second weak portion 35 is a metal sheet with a certain thickness after electrolysis loss, and the structures of the second weak portion 35 are various, not only are set according to practical requirements, but also the purpose of the second weak portion 35 is to release the pressure of the second battery 34 that expands in thermal runaway no matter what the structure of the second weak portion 35 is.

In the present embodiment, the second positive electrode tab 36, the second negative electrode tab 37, and the second weak portion 35 are provided on the side surface of the second battery 34 adjacent to the large surface, and the second weak portion 35 may be provided between the second positive electrode tab 36 and the second negative electrode tab 37, or the second weak portion 35 may be provided at a position where the side surface is close to the end portion. In this embodiment, the second weak portion 35 is provided on a side surface of the second battery 34 adjacent to the large surface, for example, on a left side surface, a right side surface, a front side surface, or a rear side surface of the second battery 34, and when the second battery 34 is thermally out of control, the height Wen Wuzhi in the second battery 34 breaks the second weak portion 35 and spouts to the side portion, so that the second weak portion is not spouted to the top electric device and the passenger compartment, and safety is ensured.

Referring to fig. 3 and 6, the 48V battery module 2 and the 12V battery module 3 of the present embodiment are each fixed in the case 1. Specifically, the case 1 of the present embodiment is illustrated by taking a square structure as an example, the case 1 includes a square bottom plate 11 and four side plates 12, the four side plates 12 are disposed at four edges of the bottom plate 11 and extend upward, and the four side plates 12 are sequentially connected to form a closed structure, thereby forming the square case 1. The bottom of the 48V battery module 2 is fixed to the top of the bottom plate 11 of the case 1 by glue bonding such as heat conductive glue so that the 48V battery module 2 is fixed to the lower region inside the case 1. The case 33 of the battery pack in the 12V battery module 3 includes an upper cover 38 and a lower plate 39 that are fastened up and down, two second batteries 34 that are stacked up and down are provided in the fastening region of the upper cover 38 and the lower plate 39, and both ends of the case 33 in the longitudinal direction are open, and both ends of the case 33 in the thickness direction extend toward the front and rear sides, respectively, and are fixedly connected with the side plates 12 of the case 1. The inner walls of the opposite side plates 12 extending in the length direction of the case 1 are provided with lifting lugs 13 at positions corresponding to the housing 33 of the battery pack, and both ends of the housing 33 in the thickness direction are lifted at the lifting lugs 13 by bolts and/or rivets, so that the 12V battery module 3 is fixed in an upper region in the case 1, and a space exists between the 12V battery module 3 and the 48V battery module 2.

In addition, the top of the 48V battery module 2 of the present embodiment is provided with a busbar 6, the right side of the second battery pack 32 is provided with a first insulating support 4, the first insulating support 4 is provided with a 12V output positive electrode 41, a 48V output positive electrode 42, a 12V-48V output negative electrode 43, the first insulating support 4 is further provided with electrical elements such as a relay 44, the relay 44 is electrically connected with a busbar 51 and a relay 52, the top of the second battery pack 32 is provided with a second insulating support 5, the second insulating support 5 is provided with a busbar 51 and a relay 52, and the relay 52 is electrically connected with a 12V harness 7 and a 48V harness 8.

Specifically, the first insulating holders 4 of the present embodiment extend toward the front and rear sides, respectively, at both ends in the thickness direction and are fixedly connected with the side plates 12 of the case 1. The inner walls of the two opposite side plates 12 extending along the length direction of the box body 1 are provided with lifting lugs 13 corresponding to the positions of the first insulating brackets 4, and the two ends of the first insulating brackets 4 along the thickness direction are hoisted at the lifting lugs 13 in a bolt and/or riveting mode. The top of the housing 33 of the second battery pack 32 is provided with a stud protruding, and the stud is fixedly connected with the second insulating holder 5, thereby fixing the second insulating holder 5 to the top of the second battery pack 32.

In the present embodiment, the description is given by taking the case where the 12V battery module 3 is disposed above the 48V battery module 2 as an example, and in practical application, the 48V battery module 2 may be disposed above the 12V battery module 3, and the configuration and positional relationship of each component may be adjusted accordingly.

In addition, the embodiment also discloses electric equipment, and the electric equipment comprises the 12V-48V battery pack. Because the volume of the 12V-48V battery pack is smaller, the occupied volume in the electric equipment is small, the integration level of other parts in the electric equipment is improved, and the space utilization rate of the electric equipment is improved.

The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (13)

1. A battery pack, comprising: the battery module comprises two battery modules, namely a 48V battery module (2) and a 12V battery module (3), wherein the two battery modules are arranged up and down, the battery modules positioned below comprise a first battery (21), and the first battery (21) is provided with a first weak part (22) facing the battery modules positioned above.

2. A battery pack according to claim 1, wherein: the 12V battery module (3) is arranged above the 48V battery module (2), the 48V battery module (2) comprises the first battery (21), and the first battery (21) is provided with a first weak part (22) facing the 12V battery module (3).

3. A battery pack according to claim 2, wherein: and a gap is arranged between the 12V battery module (3) and the 48V battery module (2).

4. A battery pack according to claim 3, wherein: the 12V battery module (3) comprises at least two battery packs, and the at least two battery packs are arranged at intervals along the length direction of the 48V battery module (2).

5. A battery pack according to claim 4, wherein: and the gap between the battery pack at the middle part and the 48V battery module (2) is smaller than the gap between the battery pack at the end part and the 48V battery module (2) along the length direction of the 48V battery module (2).

6. A battery pack according to claim 4, wherein: the battery pack comprises a shell (33) and at least two second batteries (34) positioned in the shell (33), wherein the at least two second batteries (34) are arranged in a vertically stacked mode, and the large surface of each second battery (34) faces to a first weak part (22) of the 48V battery module (2).

7. A battery pack as defined in claim 6, wherein: the second battery (34) is provided with a second weak portion (35), and the second weak portion (35) is arranged on the side surface of the second battery (34) adjacent to the large surface.

8. A battery pack as defined in claim 6, wherein: the battery pack further comprises a box body (1), and the 48V battery module (2) and the 12V battery module (3) are arranged in the box body (1).

9. A battery pack as claimed in claim 8, wherein: the 48V battery module (2) is adhered and fixed with the bottom plate (11) of the box body (1).

10. A battery pack as claimed in claim 8, wherein: the inner walls of two opposite side plates (12) of the box body (1) extending along the length direction of the 48V battery module (2) are provided with lifting lugs (13), the positions of the lifting lugs (13) correspond to the positions of the shell (33), and the shell (33) is fixedly connected with the lifting lugs (13).

11. A battery pack as claimed in claim 10, wherein: the battery pack further comprises at least one insulating bracket for mounting electrical components, wherein the insulating bracket is fixedly connected with the lifting lug (13), and/or the insulating bracket is fixedly mounted at the top of the battery pack.

12. A battery pack according to claim 1, wherein: the 48V battery module (2) comprises a plurality of first batteries (21) connected in series, and the plurality of first batteries (21) are stacked along the length direction of the 48V battery module (2).

13. An electrical consumer, characterized in that: a battery pack comprising any one of claims 1-12.