CN211530020U - Power-off maintenance device and battery pack - Google Patents

Abstract

The utility model relates to a device and battery package are maintained in outage. The power-off maintenance device comprises a shell and a disassembly-preventing bolt. The casing is installed in the surface of battery package in order to cover the high-voltage circuit of battery package, includes: the maintenance port is arranged on the visible surface of the shell and is aligned to one side of the circuit breaker of the high-voltage circuit, and the circuit breaker is connected in series with the high-voltage circuit; and the limiting structure is arranged on a plurality of side surfaces of the shell, extends outwards and is arranged below the edge of the opening of the surface so as to be matched with the surface mounting shell. Prevent tearing open the bolt from casing internally mounted in at least one side of casing to extend with cooperation limit structure fixed surface to the casing outside, prevent tearing open the bolt and locate the opposite side of circuit breaker and shelter from in order to be sheltered from by the circuit breaker. The utility model discloses can open power battery package upper cover in order to expose its B level voltage circuit before operating personnel, guarantee the high-pressure return circuit of preferential disconnection B level voltage circuit in order to prevent that operating personnel from electrocuteeing to possess with low costs, the beneficial effect that the reliability is high.

Description

Power-off maintenance device and battery pack

Technical Field

The utility model relates to an electrical safety that the battery package was maintained especially relates to a prevent that the outage of maintainer electric shock from maintaining device, a battery package of installing this outage and maintaining device to and a battery package maintenance method based on this outage is maintained the device.

Background

In order to ensure electrical safety during use and maintenance, a Manual Service Disconnect (MSD) is usually provided on a power storage battery device of a new energy vehicle. By arranging the manual maintenance switch, the high-voltage loop of the B-level voltage circuit can be ensured to be disconnected preferentially before an operator opens the upper cover of the power storage battery pack to expose the B-level voltage circuit, so that the operator is prevented from getting an electric shock.

Referring to fig. 1, fig. 1 shows a schematic view of a conventional manual maintenance switch.

As shown in fig. 1, a manual maintenance switch 11 of a power storage battery pack is generally provided on a side surface of an upper cover 12 of the battery pack, or a lower case 13 of the battery pack. The surface provided with the manual service switch 11 may be fixed to the main body of the battery pack and restricted by the limit structure of the manual service switch 11 so as not to be opened.

Referring further to fig. 2, fig. 2 shows a schematic diagram of a conventional manual maintenance switch.

As shown in fig. 2, the above-mentioned conventional manual maintenance switch 11 is generally composed of an MSD plug 21, an MSD socket 22, and an MSD mounting bracket 23. The MSD mounting bracket 23 is fixedly mounted to the main body of the battery pack, and is used to fix the MSD socket 22. The MSD socket 22 is connected with a B-level voltage circuit of the battery pack; and includes a plurality of receptacles 221 for mating with the plurality of blades 211 of the MSD plug 21 to turn on the class B voltage circuit. The MSD plug 21 includes a plurality of blades 211 corresponding to the plurality of jacks 221, and a main circuit fuse 212 electrically connected to the plurality of blades 211.

During the maintenance or repair of the power battery pack, an operator must first pull out the MSD plug 21 to cause the high voltage circuit of the class B voltage circuit to open in response to the tab 211 being pulled out, in order to open the battery pack cover. Otherwise, the outer case of the MSD plug 21 interferes with the opening of the upper cover of the battery pack, so that the upper cover of the battery pack cannot be opened. This ensures that the high voltage circuit of the class B voltage circuit is open before the operator touches the class B voltage circuit in the battery pack.

However, as shown in fig. 2, the above-mentioned manual maintenance switch 11 involves a quick-release structure of the high-voltage connector, which requires a large number of plastic mold pieces, and the metal insertion piece 211 for overcurrent must be silver-plated to reduce the large contact resistance caused by the insertion structure, thus having a disadvantage of high cost. Secondly, the fuse 212 integrated and sealed inside the MSD plug 21 has a defect of poor heat dissipation performance, and a higher requirement is put on the rated current specification of the fuse 212, and there is a problem that the life expectancy of the fuse 212 is easily reduced. Thirdly, as shown in fig. 1, the manual service switch 11 with the plug-in structure is a small protrusion relative to the plane of the upper cover 12 of the battery pack, and a hollow space must be reserved on the vehicle chassis for the structure to have enough operation space. However, the structure of forming a hollow on the chassis of the vehicle is disadvantageous for waterproof, noise-proof and electromagnetic interference-proof. Fourthly, along with the implementation of the national requirement on the thermal runaway thermal diffusion of the new energy automobile, the interface of the manual maintenance switch 11 and the power storage battery pack becomes an obvious fire leakage and smoke leakage point, and the thermal runaway thermal diffusion protection of personnel in the automobile is not facilitated.

Therefore, in order to overcome the above-mentioned defects in the prior art, there is a need in the art for an electrical safety technique for maintaining a battery pack, which is used to ensure that a high-voltage circuit of a B-class voltage circuit is preferentially disconnected to prevent an electric shock of an operator before the operator opens an upper cover of a power storage battery pack to expose the B-class voltage circuit, and has the advantages of low cost and high reliability. Furthermore, in some embodiments, the electrical safety technology for maintaining the battery pack can also preferably have the beneficial effects of water resistance, noise prevention, electromagnetic interference prevention, fire and smoke leakage prevention.

SUMMERY OF THE UTILITY MODEL

The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

In order to overcome the above-mentioned defect that prior art exists, the utility model provides a prevent that the outage of maintainer electric shock maintains device, a battery package of installing this outage and maintaining device to and a battery package maintenance method based on this outage maintains device, be used for before operating personnel opens power storage battery package upper cover in order to expose its B level voltage circuit, guarantee the high-voltage circuit of priority disconnection B level voltage circuit in order to prevent that operating personnel from electrocuteeing. Meanwhile, the power-off maintenance device, the battery pack and the battery pack maintenance method have the advantages of low cost and high reliability.

The utility model provides an above-mentioned outage is maintained device, include the casing and prevent tearing open the bolt. The housing is mounted on a surface of a battery pack to cover a high voltage circuit of the battery pack, and includes: the maintenance port is arranged on the visible surface of the shell and is aligned to one side of a circuit breaker of the high-voltage circuit, wherein the circuit breaker is connected in series with the high-voltage circuit; and the limiting structures are arranged on a plurality of side surfaces of the shell, extend outwards, and are arranged below the edge of the opening of the surface so as to be matched with the surface to install the shell. The anti-dismantling bolt is installed in the shell from the inside of the shell on at least one side of the shell, extends outside the shell to be matched with the limiting structure to fix the surface, and is arranged on the other side of the circuit breaker to be shielded by the circuit breaker.

Preferably, in an embodiment of the present invention, the tamper bolt may further include: a latch body mounted to at least one of the sides of the housing from within the housing and extending outwardly of the housing; and the fastening bolt is arranged in the shell and is shielded by the circuit breaker and is used for matching with the thread structure on the side surface of the shell to fasten and dismount the bolt body.

Preferably, in an embodiment of the present invention, the tamper-proof bolt may further include a sealing ring installed between the bolt body and the side surface of the housing to seal the housing.

Optionally, in an embodiment of the present invention, the tamper-proof bolt may further include a plurality of the bolt bodies, wherein the plurality of the bolt bodies are connected by a connecting portion. The fastening bolt may be engaged with the screw structures of the connecting part and the side of the housing to fasten and dismount the plurality of latch bodies.

Optionally, in an embodiment of the present invention, the tamper bolt may extend toward the inside of the housing to cooperate with the circuit breaker to fix the housing.

Optionally, in an embodiment of the invention, the size of the service opening may be adapted to the size of the circuit breaker. The circuit breaker can block off the service opening to shield the anti-dismantling bolt and the rest of the high-voltage circuit.

Optionally, in an embodiment of the present invention, a maintenance port cover may be further included for covering the maintenance port to seal the housing.

According to another aspect of the present invention, there is also provided a battery pack.

The utility model provides an above-mentioned battery package, its surface mounting have above-mentioned arbitrary outage to maintain the device, wherein, the surface includes the opening, open-ended border install in on the limit structure of outage maintenance device, and install in outage maintenance device prevent tearing open under the bolt in order to fix.

According to another aspect of the present invention, there is also provided a method of maintaining a battery pack.

The utility model provides a maintenance method of above-mentioned battery package, including the step: removing a circuit breaker of a high-voltage circuit of the battery pack from a service opening of a housing of a power outage maintenance device to break the high-voltage circuit and expose a tamper-proof bolt of the power outage maintenance device, the tamper-proof bolt being mounted to at least one side of the housing and extending outward of the housing; removing the anti-removal bolt to release the fixation of the surface of the battery pack, wherein the surface is used for installing the shell and covering the high-voltage circuit; removing the surface of the battery pack to release the fixing of a limiting structure of the shell, wherein the limiting structure is arranged on a plurality of sides of the shell, extends outwards and is arranged below the edge of an opening on the surface; and removing the housing to expose the high voltage circuit for maintenance.

Preferably, in an embodiment of the present invention, the step of removing the tamper bolt may further include the steps of: and dismantling a fastening bolt of the anti-dismantling bolt so as to dismantle a bolt body of the anti-dismantling bolt, wherein the fastening bolt is installed inside the shell through the thread structure of the side face and is shielded by the circuit breaker, and the bolt body is installed inside the shell on at least one side face of the shell from the inside of the shell and extends towards the outside of the shell.

Drawings

The above features and advantages of the present invention will be better understood upon reading the detailed description of embodiments of the present disclosure in conjunction with the following drawings. In the drawings, components are not necessarily drawn to scale, and components having similar relative characteristics or features may have the same or similar reference numerals.

Fig. 1 shows a schematic view of the installation of a conventional manual service switch.

Fig. 2 shows a schematic diagram of a common manual maintenance switch.

Fig. 3 shows an assembly diagram of the power outage maintenance device according to an embodiment of the present invention.

Fig. 4 shows an internal structural schematic diagram of the power outage maintenance device according to an embodiment of the present invention.

Fig. 5 is a schematic diagram illustrating a power outage maintenance device to which a tamper bolt is to be installed according to an embodiment of the present invention.

Fig. 6 is a schematic flow chart illustrating a maintenance method of a battery pack according to another aspect of the present invention.

Reference numerals:

11 a manual maintenance switch;

12, covering the upper cover;

13 a lower housing;

14 battery pack high voltage socket;

15 battery pack low voltage socket;

16 battery pack mounting ears;

21 MSD plug;

211 an insert sheet;

a 212 fuse;

22 MSD socket;

a 221 jack;

23 MSD mounting bracket;

241 positive power supply terminal;

242 negative terminal of power supply;

31 a housing;

311 maintenance ports;

312, a limiting structure;

321 a bolt body;

322 fastening a bolt;

323 a seal ring;

331 a battery pack upper cover;

332 a fuse;

333 power supply positive terminal;

334 negative terminal of power supply;

34 repairing the opening cover;

601-604 steps of a maintenance method of a battery pack.

Detailed Description

The following description is provided for illustrative embodiments of the present invention, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to only those embodiments. On the contrary, the intention of implementing the novel features described in connection with the embodiments is to cover other alternatives or modifications which may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Furthermore, some of the specific details are omitted from the description so as not to obscure or obscure the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Additionally, the terms "upper," "lower," "left," "right," "top," "bottom," "horizontal," "vertical" and the like as used in the following description are to be understood as referring to the segment and the associated drawings in the illustrated orientation. The relative terms are used for convenience of description only and do not imply that the described apparatus should be constructed or operated in a particular orientation, and therefore should not be construed as limiting the invention.

It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, regions, layers and/or sections, these elements, regions, layers and/or sections should not be limited by these terms, but rather are used to distinguish one element, region, layer and/or section from another element, region, layer and/or section. Thus, a first component, region, layer and/or section discussed below could be termed a second component, region, layer and/or section without departing from some embodiments of the present invention.

As described above, the conventional manual maintenance switch 11 involves a quick release structure of a high-voltage connector, and requires a large number of plastic mold pieces, and the overcurrent metal tab 211 must be silver-plated to reduce a large contact resistance caused by the tab structure, which results in a high cost. Secondly, the fuse 212 integrated and sealed inside the MSD plug 21 has a defect of poor heat dissipation performance, and a higher requirement is put on the rated current specification of the fuse 212, and there is a problem that the life expectancy of the fuse 212 is easily reduced. Thirdly, as shown in fig. 1, the manual service switch 11 with the plug-in structure is a small protrusion relative to the plane of the upper cover 12 of the battery pack, and a hollow space must be reserved on the vehicle chassis for the structure to have enough operation space. However, the structure of forming a hollow on the chassis of the vehicle is disadvantageous for waterproof, noise-proof and electromagnetic interference-proof. Fourthly, along with the implementation of the national requirement on the thermal runaway thermal diffusion of the new energy automobile, the interface of the manual maintenance switch 11 and the power storage battery pack becomes an obvious fire leakage and smoke leakage point, and the thermal runaway thermal diffusion protection of personnel in the automobile is not facilitated.

In order to overcome the above-mentioned defect that prior art exists, the utility model provides a prevent that the outage of maintainer electric shock maintains device, a battery package of installing this outage and maintaining device to and a battery package maintenance method based on this outage maintains device, be used for before operating personnel opens power storage battery package upper cover in order to expose its B level voltage circuit, guarantee the high-voltage circuit of priority disconnection B level voltage circuit in order to prevent that operating personnel from electrocuteeing. Meanwhile, the power-off maintenance device, the battery pack and the battery pack maintenance method have the advantages of low cost and high reliability. It is understood that the B-class voltage circuit refers to a dc circuit of the vehicle power battery pack with an operating voltage of 60V or more.

Referring to fig. 3, fig. 3 is a schematic assembly diagram of a power outage maintenance device according to an embodiment of the present invention.

As shown in fig. 3, the present invention provides an apparatus for maintaining power failure, which may include a housing 31 and a tamper bolt. In some embodiments, the housing 31 may be a cast aluminum housing, and may be mounted on the upper surface of the battery pack for engaging the battery pack cover 331 to cover the high voltage circuit (e.g., class B voltage circuit) of the battery pack. The high voltage circuit may include a circuit breaker 332 connected in series with its main circuit. The circuit breaker 332 includes, but is not limited to, a fuse whose rated current specification is adapted to the safe upper current limit of the battery pack. In some preferred embodiments, the fuse 332 may be connected to the positive power supply terminal 333 and the negative power supply terminal 334 of the high-voltage circuit by screw fastening structures, so as to reduce the contact resistance of the fuse 332 with the rest of the high-voltage circuit, thereby eliminating the production cost of silver plating the contact terminals.

In some embodiments, the upper visible surface of the housing 31 may be provided with a service opening 311 facing the upper side of the fuse 332 located uppermost in the high voltage circuit. In some preferred embodiments, the size of the service opening 311 may be adapted to the size of the fuse 332 such that the fuse 332 may occupy substantially the entire service opening 311 to be plugged to shield the remaining portion of the high voltage circuit and the tamper evident pins thereunder. When the battery pack is maintained or repaired, an operator can insert a screwdriver or other detaching tool into the housing 31 through the repair opening 311 from above to detach the fuse 332 without touching the detachment preventing pin below the fuse 332 and the rest of the high voltage circuit, thereby preventing the operator from getting an electric shock.

Further, by disposing the fuse 332 at the uppermost position of the high-voltage circuit and facing the maintenance opening 311, the heat dissipation performance of the fuse 332 can be greatly improved, thereby reducing the requirement for the rated current specification of the fuse 212 and increasing the life expectancy of the fuse 212.

It will be appreciated by those skilled in the art that the maintenance opening 311 formed in the upper visible surface of the housing 31 is only an embodiment provided by the present invention, and is mainly used to clearly demonstrate the concept of the present invention, and provide a specific solution convenient for the public to implement, rather than to limit the protection scope of the present invention.

Alternatively, in another embodiment, the maintenance opening 311 may be disposed on a front-side visible surface of the housing 31, which is directly opposite to a front side of the fuse 332 located at the forefront of the high-voltage circuit, so as to achieve the same technical effect. Accordingly, in other embodiments, the maintenance opening 311 may be disposed on other visible surfaces of the housing 31, and directly faces the side of the fuse 332 facing the outside of the housing 31 in the direction corresponding to the high-voltage circuit, so as to achieve the same technical effect.

It will be appreciated by those skilled in the art that the above-mentioned housing 31 mounted on the upper surface of the battery pack is only an embodiment provided by the present invention, and is mainly used to clearly demonstrate the concept of the present invention and provide a specific solution for the public to implement, but not to limit the protection scope of the present invention.

Alternatively, in other embodiments, the housing 31 may also be mounted on the upper surface, the lower surface, the front surface, the rear surface, the left surface or the right surface of the battery pack, and is used to cooperate with the cover body on the corresponding surface of the battery pack to cover the high-voltage circuit of the battery pack, so as to achieve the same technical effect. Preferably, in other embodiments, a plurality of power-off maintenance devices may be further disposed on a plurality of surfaces of the battery pack, so that an operator may open the corresponding cover body according to a specific configuration structure of the battery pack to maintain or repair the battery pack.

In some embodiments of the present invention, the housing 31 may further include a limiting structure 312 disposed on a plurality of sides of the housing 31 and extending outward. As shown in fig. 3, in some embodiments, the retaining structure 312 may be disposed at the end below the sides of the housing 31 and extend outward and fit under the edge of the opening of the battery pack cover 331 to engage the battery pack cover 331 to fixedly mount the housing 31. Specifically, when assembling the power storage pack of the vehicle, the operator may first cover the housing 31 above the position where the fuse 332 is to be installed so that the maintenance opening 311 faces the position where the fuse 332 is to be installed, and then press the pack upper cover 331 with the opening against the stopper structure 312 of the housing 31 to limit the displacement of the housing 31. Then, the operator can fix the battery pack upper cover 331 to the main body of the battery pack by using a bolt, a buckle, or the like, so as to fix the battery pack upper cover 331 and the housing 31.

In some embodiments of the present invention, the power-off maintenance device may further include a tamper-resistant latch. The anti-detach latch may be mounted to at least one side of the housing 31 from the inside of the housing 31 and extend to the outside of the housing 31 to engage the stopper structure 312 to fix the battery pack cover 331.

Referring to fig. 4, fig. 4 is a schematic diagram illustrating an internal structure of the power outage maintenance apparatus according to an embodiment of the present invention.

As shown in fig. 4, in some embodiments, the tamper bolt may include a bolt body 321 and a fastening bolt 322. The latch body 321 may be installed on the front side of the housing 31 from the inside of the housing 31 and extend to the outside of the housing 31 to cooperate with the limiting structure 312 to fix the battery pack cover 331. Specifically, when the maintenance or repair of the battery pack is performed, even if the operator releases the fixing structure between the battery pack upper cover 331 and the battery pack main body, the battery pack upper cover 331 is restricted by the plug body 321 and cannot be removed upward. Accordingly, the housing 31 is also restricted by the limiting structure 312 and the battery pack upper cover 331 and cannot be taken out in an upward-detaching manner, so that the electric shock hazard caused by directly detaching the battery pack with electricity by an operator is prevented. In some preferred embodiments, the installation height of the tamper bolt may be adapted to the thickness of the pack upper cover 331, thereby further stably fixing the pack upper cover 331.

In some embodiments, the fastening bolt 322 may be mounted inside the housing 31 and shielded by the fuse 332 for fastening and removing the plug pin body 321 in cooperation with a threaded structure of the front side of the housing 31. By providing the fastening bolt 322 for fastening and detaching the plug body 321 below the fuse 332, an operator cannot remove the detachment prevention plug provided on the lower side of the fuse 332 by bypassing the fuse 332 through the maintenance opening 311 provided on the upper side of the fuse 332. That is, before the operator opens the battery pack cover 331 to expose its class B voltage circuit, the fuse 332 must be removed preferentially to open the high voltage circuit of the class B voltage circuit, thereby preventing the operator from accidentally touching the rest of the high voltage circuit and causing an electric shock.

It will be appreciated by those skilled in the art that the above-mentioned anti-tamper bolt mounted on the front side of the housing 31 is only an embodiment provided by the present invention, and is mainly used to clearly demonstrate the concept of the present invention, and provide a specific solution convenient for the public to implement, but not to limit the protection scope of the present invention.

Alternatively, in another embodiment, a tamper-proof latch may be mounted on the rear, left or right side of the housing 31 for engaging the limiting structure 312 to fix the battery pack cover 331. Preferably, in other embodiments, a plurality of anti-detachment pins may be respectively mounted to a plurality of sides of the case 31, thereby further stably fixing the battery pack upper cover 331.

In some embodiments of the present invention, the housing 31 may be fixed to the main body of the battery pack through a limiting structure inside the housing 31. As shown in fig. 4, in some embodiments, the tamper bolt fastening bolt 322 may extend inwardly of the housing 31 to below the fuse 332 to engage the fuse 332 to secure the housing 31. Specifically, when assembling the power battery pack of the vehicle, the operator may first screw the fastening bolt 322 into the screw hole on the side surface of the housing 31 to fasten the latch body 321. At this time, the distal end in the inward extending direction of the fastening bolt 322 is located below the fuse 332 to be mounted. Thereafter, the operator may connect the fuse 332 in series between the positive power supply terminal 333 and the negative power supply terminal 334 of the high voltage circuit using the fuse 332 screwed into the fastening structure. At this time, the fuse 332 is positioned above the fastening bolt 322, and restricts upward movement of the tamper bolt. By adopting the limiting structure arranged inside the shell 31, even if the operator releases the installation and fixation of the battery pack upper cover 331 and the battery pack main body, the battery pack upper cover 331 and the shell 31 cannot be taken down at the same time, thereby preventing the electric shock hazard caused by the direct live disassembly of the battery pack by the operator.

Referring further to fig. 5, fig. 5 is a schematic diagram illustrating a power-off maintenance device to which a tamper bolt is to be installed according to an embodiment of the present invention.

As shown in fig. 5, in some embodiments of the present invention, the tamper resistant pin may include a plurality of pin bodies 321, for example, two pin bodies 321. The plurality of latch bodies 321 may be connected by a connecting portion, installed on the front side of the housing 31 from the inside of the housing 31, and extended to the outside of the housing 31 to cooperate with the limiting structure 312 to fix the battery pack cover 331. In some embodiments, the fastening bolt 322 may engage with the screw thread structures of the coupling portion and the front side of the housing 31 to fasten and remove the plurality of plug-pin bodies 321 of the tamper plug pin. By employing the detachment prevention pins with the plurality of pin bodies 321, the battery pack upper cover 331 can be further stably fixed to prevent it from shaking.

In some preferred embodiments, the tamper bolt may further include a sealing ring 323. The number and caliber of the seal rings 323 can be adapted to the number and outer diameter of the plug body 321. A sealing ring 323 may be installed between the plug body 321 and the front side surface of the housing 31 for sealing the housing 321. Through set up sealing washer 323 between bolt body 321 and casing 31, can promote casing 31's leakproofness to promote the waterproof, noise control of battery pack, electromagnetic interference resistance, leak protection fire and leak the effect of cigarette.

As shown in FIG. 1, in some preferred embodiments, the power-off maintenance device may also include a service flap 34. The service flap 34 may be sized to fit into the service opening 311 for covering the service opening 311 to seal the housing 31. Through configuring a maintenance port cover 34 with an adaptive size for the maintenance port 311, the sealing performance of the casing 31 can be improved, thereby improving the waterproof, noise-proof, electromagnetic interference-proof, fire-proof and smoke-leakage-proof effects of the battery pack.

According to another aspect of the present invention, there is also provided a battery pack. One or more surfaces of the battery pack can be provided with the power-off maintenance device provided by any one of the above embodiments, so that the high-voltage loop of the B-class voltage circuit is guaranteed to be disconnected preferentially to prevent an electric shock of an operator before the operator opens the upper cover of the power storage battery pack to expose the B-class voltage circuit. Meanwhile, the power-off maintenance device, the battery pack and the battery pack maintenance method have the advantages of low cost and high reliability. In some embodiments, the surface on which the outage maintenance device is mounted may include an opening. The edge of the opening is arranged above the limiting structure 312 of the power-off maintenance device and is arranged below the anti-dismounting bolt of the power-off maintenance device, so that the limiting structure 312 of the power-off maintenance device and the anti-dismounting bolt are used for limiting and fixing.

According to another aspect of the present invention, there is also provided a method of maintaining a battery pack.

Referring to fig. 6, fig. 6 is a schematic flow chart illustrating a maintenance method of a battery pack according to another aspect of the present invention.

As shown in fig. 6, the maintenance method of the battery pack provided by the present invention may include the steps of:

601: removing a breaker of a high-voltage circuit of the battery pack from a maintenance opening of a housing of the power-off maintenance device to break the high-voltage circuit and expose a removal-proof bolt of the power-off maintenance device;

602: removing the anti-disassembly bolt to release the fixation of the surface of the battery pack;

603: removing the surface of the battery pack to release the fixing of the limiting structure of the shell; and

604: the housing is removed to expose the high voltage circuit for maintenance.

The maintenance method of the battery pack can be implemented based on the battery pack provided with the power-off maintenance device, can meet the structural characteristics of the power-off maintenance device provided by any one of the embodiments, and can achieve the technical effect corresponding to any one of the structural characteristics. In some embodiments, the anti-tamper latch of step 601 may be mounted to at least one side of the housing 31 and extend outward of the housing 31 for engaging the retaining structure 312 to secure the battery pack cover 331. In some embodiments, the surface in step 602 may be a specific surface for mounting the housing 31 and covering the high voltage circuit, such as: and a battery pack upper cover 331 mounted with a power-off maintenance device. In some embodiments, the limiting structure 312 of step 603 can be disposed on multiple sides of the housing 31 and extend outward and fit under the edge of the opening of the specific surface of the battery pack for engaging the battery pack cover 331 to fixedly mount the housing 31.

In some preferred embodiments, for the tamper-proof bolt composed of the bolt body 321 and the fastening bolt 322, the step 602 may further include the steps of: the fastening bolt 322 of the tamper bolt is removed to remove the bolt body 321 of the tamper bolt. In some embodiments, the fastening bolt 322 may be mounted inside the housing 31 by a threaded structure on the side of the housing 31 and shielded by the fuse 332. In some embodiments, the latch body 321 may be mounted to at least one side of the housing 31 from the inside of the housing 31 and extend to the outside of the housing 31 for engaging the limiting structure 312 to fix the battery pack cover 331.

While, for purposes of simplicity of explanation, the methodologies are shown and described as a series of acts, it is to be understood and appreciated that the methodologies are not limited by the order of acts, as some acts may, in accordance with one or more embodiments, occur in different orders and/or concurrently with other acts from that shown and described herein or not shown and described herein, as would be understood by one skilled in the art.

The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. An outage maintenance device, comprising:

a case mounted on a surface of a battery pack to cover a high voltage circuit of the battery pack, comprising:

the maintenance port is arranged on the visible surface of the shell and is aligned to one side of a circuit breaker of the high-voltage circuit, and the circuit breaker is connected in series with the high-voltage circuit; and

the limiting structures are arranged on a plurality of side surfaces of the shell, extend outwards and are arranged below the edge of the opening of the surface so as to be matched with the surface to install the shell; and

prevent tearing open the bolt, follow casing internally mounted in at least one of casing the side, and to the casing outside extends in order to cooperate limit structure is fixed the surface, prevent tearing open the bolt and locate the opposite side of circuit breaker in order to be sheltered from by the circuit breaker.

2. The outage maintenance device of claim 1, wherein the tamper bolt comprises:

a latch body mounted to at least one of the sides of the housing from within the housing and extending outwardly of the housing; and

and the fastening bolt is arranged inside the shell and is shielded by the circuit breaker and is used for matching with the thread structure on the side surface of the shell to fasten and dismount the bolt body.

3. The outage maintenance device of claim 2, wherein the tamper bolt further comprises a seal ring mounted between the bolt body and the side of the housing to seal the housing.

4. The maintenance out device of claim 2, wherein the tamper-evident bolt comprises a plurality of said bolt bodies connected by a connecting portion, and said fastening bolt engages with said connecting portion and a threaded structure of said side of said housing to fasten and remove said plurality of said bolt bodies.

5. The apparatus of claim 1, wherein the tamper-evident pin extends inwardly of the housing to engage the circuit breaker to secure the housing.

6. The outage maintenance device of claim 1, wherein the size of the service opening is adapted to the size of the circuit breaker, the circuit breaker plugging the service opening to block the tamper bolt and the rest of the high voltage circuit.

7. The power outage maintenance device of claim 1, further comprising a service flap for covering the service flap to seal the housing.

8. A battery pack characterized in that a surface of the battery pack is mounted with the power-off maintenance device according to any one of claims 1 to 7,

the surface includes an opening, the edge of which is mounted above the limit structure of the power-off maintenance device and below the anti-removal latch of the power-off maintenance device for fixation.

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