CN112582754A

CN112582754A - Power row protection device, power battery pack and vehicle

Info

Publication number: CN112582754A
Application number: CN201910925497.0A
Authority: CN
Inventors: 任正华; 王毅; 郭坤; 杨昆; 易宁
Original assignee: BYD Co Ltd
Current assignee: Jinan Fudi Battery Co ltd; BYD Co Ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2021-03-30
Anticipated expiration: 2039-09-27
Also published as: CN112582754B

Abstract

The invention is suitable for the technical field of power battery modules, and discloses a power bar protection device which comprises a protection base and a protection cover, wherein the protection base and the protection cover are connected through a connecting structure and form a containing cavity for placing a power bar, and a phase change heat dissipation piece which is in contact with the power bar is arranged in the containing cavity. The invention also provides a power battery pack which comprises battery modules and a tray for mounting the battery modules, wherein the two battery modules or/and the battery modules are connected with the power output of a system through a power bar, and the power bar is sleeved with the power bar protection device. The invention also provides a vehicle with the power battery pack. The power bar protection device, the power battery pack and the vehicle provided by the invention can be used for insulating, protecting contact and reliably fixing the power bar mechanically, and can also realize efficient heat dissipation.

Description

Power row protection device, power battery pack and vehicle

Technical Field

The invention belongs to the technical field of power battery modules, and particularly relates to a power row protection device, a power battery pack and a vehicle.

Background

The use of power battery systems requires adaptation to harsh mechanical conditions such as vibration, impact, and collision, which requires sufficient mechanical and electrical reliability for power connections between modules and system power outputs. In order to solve these problems, on the one hand, the power strip needs to be reliably fixed on the tray or the module, and on the other hand, the power strip needs to have enough insulation and contact protection level.

The existing power bar adopts a scheme of a hard/soft copper bar or an aluminum bar, the insulation and contact protection of the hard/soft copper bar or the aluminum bar adopts a hot-pressing insulating film, a thermal shrinkage insulating sleeve or other insulation and contact protection schemes, so that the requirements on wear resistance and puncture strength are high, the hot-pressing insulating film and the thermal shrinkage insulating sleeve have the risk of easy cracking and high insulation failure, and the cleanliness of the interior of a power battery system can be influenced after the hot-pressing insulating film and the thermal shrinkage insulating sleeve are cracked; the power bar is used as a connecting piece for connecting the power battery system and other contact parts, is sensitive to relative movement, and needs to be reliably fixed so as to avoid the power bar from generating relative movement and influencing the power connection effect.

Disclosure of Invention

The present invention is directed to solve at least one of the above problems, and provides a power strip protection device, a power battery pack, and a vehicle, which can insulate, protect, and reliably mechanically fix a power strip, and can also achieve efficient heat dissipation.

The technical scheme of the invention is as follows: the utility model provides a protector is arranged to power, includes protection base and protective cover, the protection base with the protective cover passes through connection structure to be connected and is formed with the appearance chamber that is used for laying power row, it is used for arranging the phase transition radiating piece that contacts with power to hold intracavity to be provided with.

Optionally, the protection base or/and the protection cover is provided with a mounting structure for fixing the power strip protection device to an external structure.

Optionally, the connecting structure comprises a first connecting structure for connecting one side of the protecting cover to the protecting base and a second connecting structure for connecting the other side of the protecting cover to the protecting base.

Optionally, the first connecting structure is a buckle structure, the buckle structure includes a clamping groove and a hook for engaging with the clamping groove, and the clamping groove and the hook are respectively disposed on the protective base and the protective cover.

Optionally, the second connecting structure is a plug pin structure, the plug pin structure includes a plug pin groove and a plug pin groove for mating with the plug pin piece in an inserting manner, and the plug pin groove and the plug pin piece are respectively disposed on the protective base and the protective cover.

Optionally, the phase-change heat sink is embedded in the inner surface of the protective base or/and the protective cover.

Optionally, the phase-change heat dissipation member is a heat pipe or a vapor chamber, and a heat absorption interface of the heat pipe or the vapor chamber is in contact with the power strip.

Optionally, the mounting structure includes a mounting seat and an elastic buckle symmetrically arranged about the mounting seat, one end of the mounting seat is connected to the protection base or the protection cover, and the other end of the mounting seat is connected to the elastic buckle.

The invention also provides a power battery pack which comprises battery modules and a tray for mounting the battery modules, wherein the two battery modules or/and the battery modules are connected with the power output of a system through a power bar, and the power bar is sleeved with the power bar protection device.

Optionally, the tray is provided with a mounting slot, and the power strip guard has a mounting structure inserted into the mounting slot to fix the power strip guard on the tray.

The invention also provides a vehicle with the power battery pack.

According to the power bar protection device, the power battery pack and the vehicle, the power bar is protected through the power bar protection device, the power bar is subjected to insulation protection and contact protection, the insulation and contact protection levels are improved, the phase change heat dissipation part is arranged in the accommodating cavity to dissipate heat, the temperature of the power bar is controlled, the phenomenon that the temperature of the power bar is too high in the process of high-power charging and discharging of the power battery pack is avoided, and therefore the normal use performance of other electronic electrical parts close to the power bar is affected is avoided, meanwhile, the power bar protection device is mechanically fixed through the arrangement of the mounting structure, the power bar is guaranteed to be stable, the power battery pack can adapt to severe mechanical working conditions such as vibration, impact and collision when the vehicle runs, and the use reliability is good.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a power strip protection apparatus according to an embodiment of the present invention;

FIG. 2 is an exploded view of a power strip guard according to an embodiment of the present invention;

FIG. 3 is a front view of a power strip guard according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view taken at A-A of FIG. 3;

FIG. 5 is an enlarged schematic view at C in FIG. 4;

FIG. 6 is a cross-sectional view taken at B-B of FIG. 3;

fig. 7 is a schematic structural diagram of a protective cover in a power strip protection apparatus according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a protection base in a power strip protection device according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a first connecting structure of a power strip protection device according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a mounting structure in a power strip protection device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It should be noted that the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, directly disposed or connected, or indirectly disposed or connected through intervening elements or intervening structures.

In addition, in the embodiments of the present invention, if there are terms of orientation or positional relationship indicated by "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., it is only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the structure, feature, device or element referred to must have a specific orientation or positional relationship, nor must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

The various features and embodiments described in the embodiments may be combined in any suitable manner, for example, different embodiments may be formed by combining different features/embodiments, and in order to avoid unnecessary repetition, various possible combinations of features/embodiments in the present invention will not be described in detail.

As shown in fig. 1 to 6, a power bar protection device provided in an embodiment of the present invention is used for insulating and protecting a power bar, and includes a protection base 1 and a protection cover 2, the protection base 1 and the protection cover 2 are connected into a whole through a connection structure 3, a cavity 4 for placing the power bar is formed between the protection base 1 and the protection cover 2, a phase change heat sink 5 for discharging heat generated by the power bar may be disposed in the cavity 4, a working medium for performing a phase change after absorbing heat is disposed in the phase change heat sink 5, and the phase change heat sink 5 is disposed in the power bar protection device and contacts with the power bar.

The power bar (power bar specific guidance busbar or busbar) in this embodiment may include a hard copper bar, a soft copper bar, or an aluminum bar, but is not limited to the hard copper bar, the soft copper bar, or the aluminum bar.

In this embodiment, the inner surface of the protection base 1 may be provided with a groove (not shown in the figure), the protection cover 2 is covered with the groove to form the cavity 4, or the inner surfaces of the protection base 1 and the protection cover 2 are both provided with grooves, and after the protection cover 2 is connected and matched with the protection base 1, the grooves of the inner surfaces of the protection base 1 and the protection cover 2 enclose the cavity 4.

Specifically, the cavity 4 may be a closed cavity structure, and the power bar is integrally disposed in the cavity 4 to prevent the electrode of the power bar from being exposed. In practical application, the cavity 4 may also be a cavity structure with one end open or two ends open.

Optionally, the protection base 1 or/and the protection cover 2 may be provided with mounting structures 6 for integrally fixing the power strip protection device to an associated external structure (e.g. a tray for mounting battery modules), without additional fixing members, with simple assembly and reliable fixing of the power strip.

Specifically, the mounting structures 6 may be provided in plural, and arranged at intervals along the length direction of the protection base 1 or/and the protection cover 2.

Optionally, as shown in fig. 1 and fig. 3, the connection structure 3 includes a first connection structure 31 for connecting one side of the protective cover 2 to the protective base 1 and a second connection structure 32 for connecting the other side of the protective cover 2 to the protective base 1, the first connection structure 31 and the second connection structure 32 are respectively disposed at two opposite sides of the power strip protective device, the first connection structure 31 and the second connection structure 32 may be provided in plurality, and only by the combined action of the first connection structure 31 and the second connection structure 32, the protective cover 2 can be fixed to the protective base 1. In this embodiment, connecting structure 3 can arrange along power row protector's length direction, and wherein, first connecting structure 31 is owing to be connected the upper end of protective cover 2 and is fixed in on the protection base 1, and second connecting structure 32 is owing to be connected the lower extreme of protective cover 2 and is fixed in on the protection base 1, mainly used is to the connection location of protection base 1 and protective cover 2.

Alternatively, as shown in fig. 7 to 9, the first connecting structure 31 may be a buckle structure, where the buckle structure includes a slot 311 disposed on the protection base 1 and a hook 312 disposed on the protection cover 2 and used for being engaged with the slot 311, or the buckle structure includes a slot 311 disposed on the protection cover 2 and a hook 312 disposed on the protection base 1 and used for being engaged with the slot 311, and the buckle structure is convenient to assemble and only needs to apply an external force to press the hook 312 into the slot 311.

Specifically, in two adjacent first connecting structures 31, the hook 312 of one first connecting structure 31 is disposed on the protective base 1, and the hook 312 of the other first connecting structure 31 is disposed on the protective cover 2, so that the effect of the snap fit is better.

Alternatively, as shown in fig. 7 to 10, the second connecting structure 32 may be a latch structure, where the latch structure includes a latch slot 322 disposed on the protection base 1 and a latch slot 322 disposed on the protection cover 2 for mating with the latch member 321, or the latch structure includes a latch slot 322 disposed on the protection cover 2 and a latch slot 322 disposed on the protection base 1 for mating with the latch member 321. In this embodiment, bolt piece 321 is flat massive, and the head of bolt piece 321 is isosceles trapezoid structure, bolt groove 322 is flat pore structure, wherein, the length on base is greater than the length of bolt groove 322 under the isosceles trapezoid structure, during the assembly, the bolt piece 321 head of isosceles trapezoid structure can play the positioning action, be convenient for bolt piece 321 aims at bolt groove 322, can also play the guide effect simultaneously, increase along with the distance that bolt piece 321 inserted bolt groove 322, two waist limits of the isosceles trapezoid structure of bolt piece 321 head are blocked by the boundary of bolt groove 322, avoid bolt piece 321 to rock at the length direction of bolt groove 322. The assembly of the protection base 1 and the protection cover 2 is as follows: 1. inserting the pin piece 321 into the pin slot 322 until the pin piece 321 is blocked by the pin slot 322; 2. then, the hook 312 is pressed toward the slot 311, so that the hook 312 is hooked on the slot 311. The operation is simple and convenient, and the assistance of other tools is not needed.

Specifically, the first connecting structures 31 may also be provided at opposite sides of the power strip guard in the width direction.

As another embodiment, the second connecting structure 32 may be a rotating connecting piece (e.g., a hinge), so that the protective cover 2 can be rotatably connected to one side of the protective base 1, the protective cover 2 is fixedly connected to the other side of the protective base 1 through the first connecting structure 31, and after the protective cover 2 is turned and tiled on the protective base 1, the protective cover 2 and the protective base 1 can be fixedly connected by pressing the hook 312 into the slot 311.

In practical applications, the head of the latch member 321 may also be in an isosceles triangle structure or a semicircular structure.

Specifically, as shown in fig. 1 to 3, the first connection structure 31 and the second connection structure 32 at both sides in the length direction of the power strip guard may be distributed in a staggered manner, i.e., the connection line of the first connection structure 31 and the second connection structure 32 intersects with the longitudinal direction. As another embodiment, the first connecting structure 31 and the second connecting structure 32 on both sides of the power strip guard in the length direction are arranged in parallel, i.e. the line connecting the first connecting structure 3 and the second connecting structure 3 is parallel to the longitudinal direction.

Optionally, as shown in fig. 2, 6, and 7, the phase-change heat sink 5 is embedded in the inner surface of the protection base 1 or/and the protection cover 2, the phase-change heat sink 5 is configured to change its shape (phase change, e.g., liquid state to gas state) by absorbing/releasing heat during operation, so as to achieve a rapid heat dissipation effect, and heat generated by the power bar during charging and discharging of the power battery pack can be rapidly discharged from the cavity 4 to control the temperature of the power bar, thereby preventing the temperature of the power bar from being too high, and thus affecting the performance of other electronic electrical components close to the power bar.

Optionally, the phase-change heat sink 5 may be a heat pipe or a vapor chamber, which has high heat dissipation efficiency and does not have noise problem during heat dissipation. In this embodiment, a heat pipe is taken as an example, and the heat pipe includes a pipe shell, a wick, and an end cap. The interior of the heat pipe is pumped into a negative pressure state and filled with proper liquid, and the liquid has a low boiling point and is easy to volatilize. The tube wall has a wick that is constructed of a capillary porous material. When one end of the heat pipe is heated, the liquid in the capillary tube is rapidly evaporated, the vapor flows to the other end under a small pressure difference and releases heat to be condensed into liquid again, and the liquid flows back to the evaporation end along the porous material under the action of capillary force, so that the circulation is not stopped, the heat is transferred from one end of the heat pipe to the other end, and the efficient heat dissipation is realized. In order to further improve the heat dissipation efficiency, the power bar can be in a plate shape, the phase change heat dissipation member 5 (heat absorption interface) can also be in a plate shape (surface shape), when the phase change heat dissipation member is installed, the evaporation end (heat absorption interface) of the heat pipe is attached to the side face of the power bar, the contact area between the power bar and the heat pipe is large, and the heat conduction performance is further improved, or heat conduction glue can be arranged between the evaporation end of the heat pipe and the power bar.

Alternatively, as shown in fig. 1 to 4 and 6 to 10, the mounting structure 6 includes a mounting seat 51 and elastic buckles 52 symmetrically arranged about the mounting seat 51, one end of the mounting seat 51 is connected to the protection base 1 or the protection cover 2, the elastic buckles 52 have inclined surfaces 53, that is, the elastic buckles 52 are triangular blocks, and align the inclined ends of the inclined surfaces 53 with the other ends of the mounting seat 51, the mounting seat 51 mainly cooperates with a mounting groove on a tray or a module, and the elastic buckles 52 can be conveniently positioned when assembling, so that the mounting seat 51 is aligned with the mounting groove.

Specifically, the mounting seat 51 may be a solid structure, or the mounting seat 51 may be a hollow structure. During the assembly, impress mount pad 51 in the mounting groove, the inclined plane 53 of elasticity buckle 52 is used for leading mount pad 51 to slide in the mounting groove, along with mount pad 51's pressure advance, in elasticity buckle 52 is extrudeed the mounting groove, elasticity buckle 52 takes place to warp and makes mount pad 51 be blocked in the mounting groove, connects fixed good reliability. In this embodiment, the mounting seat 51 is a hollow block, and two elastic fasteners 52 are respectively located on two opposite side surfaces of the hollow rectangular block. It is understood that the number of the elastic buckles 52 can be four, and the four elastic buckles are respectively located on four sides of the mounting seat 51.

In practical application, the mounting seat 51 may also be a cylindrical block, the elastic buckle 52 may have an arc surface, and the elastic buckle 52 is an arc block.

Optionally, protection base 1 and protective cover 2 are all integrative injection moulding, and its structural strength is high.

In this embodiment, the hook 312, the latch 321 and the protective cover 2 are integrally formed by injection molding, and the slot 311, the latch slot 322, the mounting structure 6 and the protective base 1 are integrally formed by injection molding.

In particular, the outer surface of the protection base 1 or/and the protection cover 2 may be provided with a reinforcing rib (not shown in the figures) to reinforce the structural strength of the protection base 1 and the protection cover 2, so as to ensure a reliable fixing effect when applied to a longer power strip.

Specifically, the strengthening rib is provided with a plurality ofly along the length direction interval of protection base 1 or protective cover 2, the strengthening rib be flat triangle-shaped piece, flat rectangle piece, flat semicircle piece and flat trapezoidal piece isotructure.

The power strip in this embodiment is a bent part, the middle part of the power strip is provided with a bent part, and the bent part and the two ends of the power strip are not on the same plane, wherein the two ends of the power strip are on the longitudinal surface, and the bent part is on the horizontal surface, that is, the bent part and the two ends of the power strip are in a mutually perpendicular relationship, as shown in fig. 7 and 8, in order to match the structure of the power strip protection device and the power strip, the middle parts of the protection base 1 and the protection cover 2 are correspondingly provided with a transverse base 11 and a transverse cover 21, the transverse base 11 and the transverse cover 21 are connected to form a transverse accommodating cavity for placing the bent part, the transverse accommodating cavity is communicated with the accommodating cavity 4, the transverse base 11 and the protection base 1, the transverse cover 21 and the protection cover 2 are of an integrated structure, and a phase change 5 can.

In practical application, the structural shape of the power row protection device is specifically determined according to the structure of the power row, so that the power row can be completely coated by the power row protection device, and good insulation and contact protection effects are achieved.

The invention also provides a power battery pack which comprises battery modules and a tray for mounting the battery modules, wherein the two battery modules or/and the battery modules are connected with the power output of a system through a power bar, the battery modules are connected in series, the power bar is sleeved with the power bar protection device, effective insulation protection and contact protection are carried out on the power bar, meanwhile, the tray is provided with a mounting groove, and a mounting structure 6 is inserted into the mounting groove to fix the power bar protection device on the tray and fix the power bar.

In practical applications, the mounting structure 6 may be disposed on the tray, and the mounting groove is disposed on the protection base 1 or/and the protection cover 2.

The invention also provides a vehicle with the power battery pack.

According to the power bar protection device, the power battery pack and the vehicle provided by the embodiment of the invention, the power bar is protected by the power bar protection device, the power bar is subjected to insulation protection and contact protection, the insulation and contact protection levels are improved, the phase change heat dissipation part 5 is arranged in the accommodating cavity 4 for heat dissipation, the temperature of the power bar is controlled, the phenomenon that the temperature of the power bar is too high in the high-power charging and discharging process of the power battery pack is avoided, so that the normal use performance of other electronic electrical components close to the power bar is influenced is avoided, meanwhile, the power bar protection device is mechanically fixed by arranging the mounting structure 6, the power bar is ensured to be stable, the power battery pack can adapt to severe mechanical working conditions such as vibration, impact and collision when the vehicle runs, and the use reliability is good.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a protector is arranged to power, includes protection base and protective cover, its characterized in that, the protection base with the protective cover passes through connection structure and connects and be formed with the appearance chamber that is used for laying power row, it is used for arranging the phase transition radiating piece that contacts with power to hold intracavity to be provided with.

2. The power strip guard of claim 1 wherein the guard base and/or the guard cover are provided with mounting structure for securing the power strip guard to an external structure.

3. The power strip guard of claim 2 wherein the attachment structure comprises a first attachment structure for attaching one side of the guard cover to the guard base and a second attachment structure for attaching the other side of the guard cover to the guard base.

4. The power strip protection device of claim 3, wherein the first connecting structure is a snap structure, the snap structure comprises a snap groove and a hook for snap-fitting with the snap groove, and the snap groove and the hook are respectively disposed on the protection base and the protection cover.

5. The power strip guard of claim 3 wherein the second attachment structure is a latch structure, the latch structure including a latch slot and a latch slot for mating with the latch member, the latch slot and the latch member being disposed on the guard base and the guard cover, respectively.

6. The power strip guard of claim 1, wherein the phase change heat sink is embedded in an inner surface of the guard base or/and the guard cover.

7. A power bank protection device according to any one of claims 1 to 6, wherein the phase change heat sink is a heat pipe or a heat spreader plate, and the heat absorbing interface of the heat pipe or the heat spreader plate is in contact with the power bank.

8. The power strip guard of any one of claims 2 to 5, wherein the mounting structure comprises a mounting base and resilient latches symmetrically disposed about the mounting base, one end of the mounting base being attached to the guard base or the guard cover, the other end of the mounting base being attached to the resilient latches.

9. A power battery pack, comprising battery modules and a tray for mounting the battery modules, wherein two of the battery modules or/and the battery modules are connected with a system power output through a power row, and the power row is sleeved with a power row protection device as claimed in any one of claims 1 to 8.

10. The power battery pack of claim 9, wherein the tray is provided with a mounting slot, and the power row guard has a mounting structure inserted into the mounting slot to secure the power row guard to the tray.

11. A vehicle characterized by having the power battery pack according to claim 9 or 10.