CN116470220A - Locking device and household energy storage system - Google Patents

Abstract

The invention provides a locking device and a household energy storage system, and relates to the technical field of energy storage batteries. The locking device comprises a screwing mechanism, a spring bolt mechanism and a flexible stay wire; the screwing mechanism comprises a first mounting assembly, a screwing assembly and a screw shaft, wherein the screwing assembly is provided with a sliding block, the screw shaft is provided with a screw groove, and the sliding block is in sliding fit with the screw groove; the spring bolt mechanism comprises a second installation component, a spring bolt and a return spring, and the return spring is arranged between the second installation component and the spring bolt; one end of the flexible stay wire is connected with the screw shaft, and the other end is connected with the lock tongue. The reset spring drives the spring bolt to pop out, and the spring bolt and the adjacent battery Bao Kage after popping out, thereby realizing the fixation between the battery packs. In the later maintenance replacement, the operator twists and twists the subassembly soon, will twist the rotary motion of subassembly and change into the screw axis and follow self axial rectilinear motion, further pulls the spring bolt through flexible acting as go-between, makes the spring bolt withdraw, can remove the fixed between the battery package, convenient operation is swift.

Description

Locking device and household energy storage system

Technical Field

The invention relates to the technical field of energy storage batteries, in particular to a locking device and a household energy storage system.

Background

A home energy storage system is understood to be a device for storing electric energy at home, which is commonly used for peak shaving and valley filling to realize energy time shifting and electricity price management. The stacked home energy storage system is usually stacked and connected in series by a plurality of battery packs in sequence, so that the capacity of the whole system meets the requirement of a user side.

The home energy storage system is installed for indoor use, and a plurality of battery packs are stacked to have a certain height. If the battery packs are not fixed, the whole stacked battery packs are easy to topple over under the condition of being subjected to lateral push-pull force or inclined in the installation plane, so that safety accidents are caused.

In this regard, the existing solution is to fix the respective battery packs by using screws.

However, the screw fixing method not only affects the appearance of the product, but also has a certain technical difficulty in the later maintenance and replacement, and the user needs to have a certain maintenance knowledge and be provided with a special tool to remove and replace the product, so that inconvenience exists.

Disclosure of Invention

In order to solve the problem that the existing battery packs are inconvenient to detach and replace due to the fact that the existing battery packs are fixed by screws, one of the purposes of the invention is to provide a locking device.

The invention provides the following technical scheme:

a locking device comprises a screwing mechanism, a spring bolt mechanism and a flexible stay wire;

the screwing mechanism comprises a first installation component, a screwing component and a screw shaft, wherein the screwing component is rotationally arranged on the first installation component, a sliding block is arranged on the screwing component, the screw shaft is slidably arranged on the first installation component, a screw groove is formed in the screw shaft, and the sliding block is slidably matched with the screw groove;

the spring bolt mechanism comprises a second installation component, a spring bolt and a return spring, wherein the spring bolt is arranged on the second installation component in a sliding manner, the return spring is arranged between the second installation component and the spring bolt, and the return spring is used for driving the spring bolt to pop up;

one end of the flexible stay wire is connected with the screw shaft, and the other end of the flexible stay wire is connected with the lock tongue.

As a further alternative scheme of the locking device, a screwing in position piece is arranged on the screwing assembly, a screwing in position part is arranged on the first mounting assembly, the screwing in position part is provided with a clamping groove, and the areas positioned at two sides of the clamping groove are in interference fit with the screwing in position piece;

the lock tongue is retracted when the screwing-in-place piece is clamped into the clamping groove.

As a further alternative scheme of the locking device, a screwing-back limiting piece is arranged on the screwing component, and a screwing-back limiting part is arranged on the first mounting component;

the bolt pops up when the screwing-back limiting part is abutted with the screwing-back limiting part.

As a further alternative to the locking device, the screwing assembly is sleeved with a coil spring, one end of the coil spring is connected with the screwing assembly, and the other end of the coil spring is connected with the first mounting assembly.

As a further alternative scheme of the locking device, an inclined opening is formed at one end of the lock tongue, which is far away from the flexible stay wire, a sliding groove is formed in the side face of the lock tongue, and the sliding groove is arranged along the length direction of the lock tongue.

As a further alternative scheme of the locking device, the lock tongue is provided with an avoidance groove, and the flexible stay wire is in sliding fit with the avoidance groove.

As a further alternative scheme of the locking device, a baffle is arranged on the second installation component, the lock tongue is arranged in a sliding penetrating way on the baffle, and the side wall of the lock tongue is provided with a step surface;

the spring return is sleeved on the lock tongue, one end of the spring return is abutted to the baffle, and the other end of the spring return is abutted to the step surface.

As a further alternative scheme of the locking device, a limiting check ring is arranged on the lock tongue and is positioned on one side of the baffle, which is opposite to the reset spring.

It is another object of the present invention to provide a home energy storage system.

The invention provides the following technical scheme:

a home energy storage system comprising a battery pack and the locking device;

the battery packs are provided with at least two battery packs, and the battery packs are stacked;

the locking device is arranged corresponding to the battery pack, the first installation component and the second installation component are fixedly connected with the corresponding battery pack, and the lock tongue is popped up and then is connected with the adjacent battery Bao Kage.

As a further alternative scheme for the household energy storage system, a boss is arranged at one end of the battery pack along the vertical direction, and a lock hole is arranged on the side surface of the boss;

the battery package is equipped with the recess along the other end of vertical direction, the spring bolt slides and wears to locate the side of recess, the spring bolt with the lockhole block.

The embodiment of the invention has the following beneficial effects:

when in use, the locking device is arranged on the corresponding battery pack. The reset spring drives the spring bolt to pop out, and the spring bolt and the adjacent battery Bao Kage after popping out, thereby realizing the fixation between the battery packs. In the later maintenance replacement, operating personnel twist and revolve and twist the subassembly, make the slider in the helicla flute internal sliding, will revolve the rotary motion who twists the subassembly and change into screw axis along self axial rectilinear motion, the screw axis is further through flexible acting as go-between traction lock tongue, overcomes reset spring's elasticity and makes the spring tongue withdraw, can remove the fixed between the battery package, convenient operation is swift.

In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view showing the overall structure of a locking device according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a twisting mechanism in a locking device according to an embodiment of the present invention;

fig. 3 shows an exploded view of a screwing mechanism in a locking device according to an embodiment of the present invention;

FIG. 4 is a schematic view showing a structure of a guide fixing member installed in a locking device according to an embodiment of the present invention;

fig. 5 shows a schematic structural view of a guiding sheet metal part in a locking device according to an embodiment of the present invention;

FIG. 6 is a schematic view showing the structure of a knob in a locking device according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a screw shaft in a locking device according to an embodiment of the present invention;

FIG. 8 is a schematic cross-sectional view of a latch mechanism in a locking device according to an embodiment of the present invention;

FIG. 9 shows an exploded view of a latch mechanism in a locking device according to an embodiment of the present invention;

fig. 10 shows a schematic structural diagram of a latch in a locking device according to an embodiment of the present invention;

fig. 11 shows a schematic structural diagram of a home energy storage system according to an embodiment of the present invention;

FIG. 12 shows an enlarged schematic view at A in FIG. 11;

fig. 13 is a schematic horizontal cross-sectional view of a battery pack in a home energy storage system according to an embodiment of the present invention.

Description of main reference numerals:

10-locking means; 100-screwing mechanism; 110-a first mounting assembly; 111-installing a guide fixing piece; 111 a-annular protrusion; 111 b-a threaded portion; 111 c-positioning projections; 111 d-a receiving groove; 111 e-screwing into place; 111 f-screwing back the limiting part; 111 g-clamping column; 112-fixing the nut; 113-guiding sheet metal parts; 113 a-a first end plate; 113 b-a connection plate; 113 c-a second end plate; 113 d-guide plates; 120-screwing the assembly; 121-a knob; 121 a-a screw; 121 b-a driving part; 121 c-screwing into place; 121 d-screwing back the limiting piece; 121 e-a clamping hole; 122-locking member; 123-pin shafts; 124-a slider; 125-coil springs; 130-screw shaft; 131-helical grooves; 132-guide grooves; 133-a first mounting hole; 134-a first wire chase; 135-a second wire chase; 200-a bolt mechanism; 210-a second mounting assembly; 211-mounting plates; 212-a third end plate; 213-baffles; 220-a lock tongue; 221-a second mounting hole; 222-a third wire chase; 223-fourth trunking; 224-bezel; 225-a chute; 226-avoiding grooves; 227—a step surface; 230-a return spring; 240-limiting check rings; 300-flexible pull wire; 310-a first mounting head; 320-flexible conduit; 321-stay wire adjusting screws; 322-stay wire adjusting nut; 323-stay wire fixing screws; 324-stay wire fixing nut; 330-a second mounting head;

20-battery pack; 21-a boss; 22-lockholes; 23-grooves.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

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 application belongs. The terminology used in the description of the templates herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Example 1

Referring to fig. 1, the present embodiment provides a locking device 10, which is applied to a home energy storage system, and is specifically used for locking stacked battery packs 20 (see fig. 11), so that the battery packs 20 are connected together. The locking device 10 includes a twisting mechanism 100, a bolt mechanism 200, and a flexible pull wire 300, and the twisting mechanism 100 is linked with the bolt mechanism 200 through the flexible pull wire 300.

Wherein the latch mechanism 200 is capable of automatically locking two adjacent battery packs 20. At the time of service replacement, the operator manipulates the screwing mechanism 100, and thus unlocks the latch mechanism 200 through the flexible wire 300.

Referring to fig. 2 and 3 together, in particular, the screwing mechanism 100 is composed of a first mounting assembly 110, a screwing assembly 120 and a screw shaft 130.

Wherein the first mounting assembly 110 is mounted on the case of the battery pack 20. The screwing assembly 120 is rotatably disposed on the first mounting assembly 110, and a slider 124 is disposed on the screwing assembly 120. The screw shaft 130 is slidably disposed on the first mounting assembly 110, a screw groove 131 is disposed on the screw shaft 130, and the slider 124 is slidably engaged with the screw groove 131. Further, the screw shaft 130 is connected to one end of the flexible wire 300.

In use, an operator turns the screw assembly 120 to rotate the slider 124. Since the screw shaft 130 is slidably engaged with the first mounting assembly 110, a radial force applied to the screw shaft 130 when the slider 124 rotates is counteracted, so that the screw shaft 130 can move only in its own axial direction and cannot rotate radially. At this time, the slider 124 cooperates with the spiral groove 131 to convert the rotational motion of the screw assembly 120 into the linear motion of the screw shaft 130 in the axial direction thereof, thereby pulling the flexible stay 300 to unlock the latch mechanism 200.

In some embodiments, the first mounting assembly 110 is comprised of a mounting guide fixture 111, a retaining nut 112, and a guide sheet metal 113.

Referring to fig. 4, the installation guide fixing member 111 is configured in a tubular shape, one end of the installation guide fixing member 111 along its axial direction is provided with an annular protrusion 111a, and the other end is provided with a threaded portion 111b.

When in installation, the installation guide fixing piece 111 penetrates through the box body of the battery pack 20, and the annular protrusion 111a is abutted with the outer wall of the box body. At the same time, the fixing nut 112 is screwed with the screw portion 111b and abuts against the inner wall of the case, thereby fixedly mounting the mounting guide fixing member 111 on the case.

Referring to fig. 5, in addition, the guide sheet metal member 113 is composed of a first end plate 113a, a connecting plate 113b, a second end plate 113c, and a guide plate 113 d. The first end plate 113a and the second end plate 113c are perpendicular to the axis direction of the installation guiding fixing member 111, the connecting plate 113b is parallel to the axis direction of the installation guiding fixing member 111, one end of the connecting plate 113b is fixedly connected with the first end plate 113a, and the other end of the connecting plate 113b is fixedly connected with the second end plate 113 c. The guide plate 113d is fixed to the middle of the connection plate 113b, and the guide plate 113d is perpendicular to the connection plate 113b and parallel to the axial direction of the installation guide fixing 111.

The first end plate 113a is slidably sleeved on the installation guide fixing piece 111, and the first end plate 113a is located between the inner wall of the box body and the fixing nut 112. The fixing nut 112 is abutted against the inner wall of the case through the first end plate 113a, and the guide sheet metal member 113 is also fixedly mounted on the case.

Alternatively, the side walls of the installation guide fixing member 111 are provided with positioning protrusions 111c in pairs, and the first end plate 113a is correspondingly provided with positioning grooves. When the first end plate 113a is sleeved on the installation guide fixing piece 111, the positioning protrusions 111c are embedded into the corresponding positioning grooves, and the first end plate 113a is positioned along the circumferential direction of the installation guide fixing piece 111, so that the whole guide sheet metal part 113 is positioned.

Referring again to fig. 2 and 3, in some embodiments, the screw assembly 120 includes a knob 121 and a lock 122.

Referring to fig. 6, the knob 121 is slidably disposed through the installation guide fixing member 111 and is in rotational fit with the installation guide fixing member 111. The knob 121 has a screwing part 121a and a driving part 121b, and the diameter of the screwing part 121a is larger than that of the driving part 121 b.

With reference to fig. 4, correspondingly, the end surface of the installation guide fixing member 111 along one axial end thereof is provided with a receiving groove 111d, and the receiving groove 111d and the annular protrusion 111a are located at the same end. The screwing part 121a of the knob 121 is fitted into the accommodation groove 111d, and the driving part 121b penetrates into the bottom of the accommodation groove 111d and is protruded from the end surface of the other end of the installation guide fixing member 111 in the axial direction thereof.

The locking piece 122 is sleeved on the part of the driving part 121b penetrating out of the installation guide fixing piece 111, and is contacted with the end face of the other end of the installation guide fixing piece 111 along the axial direction thereof. The locking piece 122 and the driving part 121b are provided with pin shafts 123 in a penetrating manner, and are fixed by pin shafts 123 in a pin joint manner. At this time, the knob 121 is restricted by the lock piece 122, and can only rotate relative to the installation guide fixing piece 111, and cannot slide on the installation guide fixing piece 111.

The driving portion 121b is provided in a tubular shape, and the slider 124 is fixedly provided on the inner wall of the driving portion 121 b.

After the screw assembly 120 is mounted on the mounting guide fixing member 111, the knob 121 is located outside the case. The operator can forward slide the screw shaft 130 along the self axial direction by forward screwing the knob 121, and pull the flexible pull wire 300. The operator can reversely slide the screw shaft 130 along the axial direction by reversely twisting the knob 121, so as to release the flexible pull wire 300.

Alternatively, the screwing-in position piece 121c is provided on the outer side wall of the screwing portion 121a, and the screwing-in position portion 111e is provided correspondingly on the side wall of the accommodation groove 111 d. The screwing-in position portion 111e has a clamping groove, and regions on both sides of the clamping groove are interference-fitted with the screwing-in position member 121 c.

When the operator turns knob 121 forward to engage the threaded keeper 121c into the slot, the latch mechanism 200 is in the unlocked state. At this time, there is significant resistance to both forward and reverse twisting of the knob 121 by the operator, which can both alert the operator to the proper twist and maintain the latch mechanism 200 in the unlocked state.

Alternatively, the screwing-back limiting member 121d is provided on the outer sidewall of the screwing portion 121a, and the screwing-back limiting portion 111f is provided on the sidewall of the accommodating groove 111 d.

When the operator turns the knob 121 in the opposite direction to bring the return stopper 121d into contact with the return stopper 111f, the flexible cord 300 is sufficiently released, and the action on the latch mechanism 200 is stopped, so that the latch mechanism 200 is turned into the locked state. Because the screwing-back limiting member 121d is blocked by the screwing-back limiting portion 111f, the operator cannot continue to reversely screw the knob 121, so that the operator can be prompted to screw back in place, and structural damage of the slider 124, the screw shaft 130 and the like caused by overlarge angle of reversely screwing the knob 121 by the operator can be avoided.

Optionally, the driving part 121b is sleeved with a coil spring 125. One end of the coil spring 125 is connected to the driving portion 121b, and the other end is connected to the installation guide fixing member 111.

When the operator turns the knob 121 in the forward direction, the coil spring 125 deforms and stores elastic potential energy. When the operator turns the knob 121 reversely, the knob 121 can rotate reversely by itself under the elastic force of the coil spring 125 after the turning-in-place member 121c is separated from the turning-in-place portion 111e until the turning-back limiting member 121d abuts against the turning-back limiting portion 111f.

In the present embodiment, a clip hole 121e through which one end of the coil spring 125 passes is provided on the outer side wall of the driving portion 121 b. In addition, a locking post 111g is fixedly provided on the bottom of the accommodating groove 111d, and the other end of the coil spring 125 is fastened to the locking post 111 g.

Referring to fig. 2 and 3 again, in some embodiments, the screw shaft 130 is slidably disposed in the driving portion 121b and is in rotation fit with the driving portion 121b, so as to be indirectly disposed on the first mounting assembly 110 through the screwing assembly 120.

Referring to fig. 7, at the same time, a guiding groove 132 is formed on the screw shaft 130. The guide groove 132 is provided along the axial direction of the screw shaft 130, and the guide plate 113d is slidably fitted into the guide groove 132. The screw shaft 130 can slide only in its own axial direction and cannot rotate in its own circumferential direction under the restriction of the guide plate 113 d.

Referring to fig. 3, in addition, a first mounting head 310 is fixedly disposed at one end of the flexible pull wire 300 near the screw shaft 130, and a first mounting hole 133, a first wire slot 134 and a second wire slot 135 are correspondingly disposed on the screw shaft 130. The first mounting hole 133 is disposed along the radial direction of the screw shaft 130, and the first mounting head 310 is slidably disposed through the first mounting hole 133. The first wire groove 134 communicates with the first mounting hole 133, and the first wire groove 134 is parallel to the first mounting hole 133. The second wire groove 135 is provided along the axial direction of the screw shaft 130, and the second wire groove 135 communicates with both the first mounting hole 133 and the first wire groove 134.

When mounting, the first mounting head 310 is aligned with the first mounting hole 133, the flexible wire 300 is aligned with the first wire groove 134, and the first mounting head 310 is slid into the first mounting hole 133 in the radial direction of the screw shaft 130. The first mounting head 310 and flexible cable 300 are then rotated to move the flexible cable 300 into the second wire slot 135. At this time, the first mounting head 310 is restricted by the flexible wire 300 and cannot slide along the radial direction of the screw shaft 130, so that the screw shaft 130 is connected to the flexible wire 300.

Optionally, a flexible conduit 320 is sleeved on the flexible stay wire 300, and a stay wire adjusting screw 321 is arranged at one end, close to the guiding sheet metal part 113, of the flexible conduit 320. The stay wire adjusting screws 321 are slidably arranged on the second end plate 113c in a penetrating manner, stay wire adjusting nuts 322 are sleeved on the stay wire adjusting screws 321, and the stay wire adjusting nuts 322 are arranged on two sides of the second end plate 113c in pairs and respectively abut against the second end plate 113 c.

The operator can adjust the tightness of the flexible cable 300 by screwing the cable adjusting nut 322 and adjusting the relative position of the cable adjusting screw 321 and the second end plate 113 c.

Referring to fig. 8 and 9 together, in particular, latch mechanism 200 includes a second mounting assembly 210, a latch 220, and a return spring 230.

Wherein the second mounting assembly 210 is mounted on the case of the battery pack 20. The latch 220 is slidably disposed on the second mounting assembly 210, and the latch 220 is connected to an end of the flexible cable 300 remote from the screw shaft 130. A return spring 230 is disposed between the second mounting assembly 210 and the locking bolt 220 for urging the locking bolt 220 to eject.

When the tongue 220 is not pulled by the flexible cord 300, it is ejected by the elastic force of the return spring 230 and engages with the case of the adjacent battery pack 20. At this time, the latch bolt mechanism 200 is in a locked state.

When the screw shaft 130 pulls the lock tongue 220 through the flexible stay 300, the spring force of the return spring 230 is overcome to drive the lock tongue 220 to retract, so that the lock tongue mechanism 200 is unlocked.

In some embodiments, the second mounting assembly 210 employs a stationary sheet metal part. The cross section of fixed sheet metal component personally submits the U type setting, and fixed sheet metal component is equipped with mounting panel 211 in pairs along self length direction's one end, and the other end is equipped with third terminal plate 212.

Wherein the mounting plate 211 is bolted to the housing of the battery pack 20.

Referring to fig. 10, in some embodiments, the latch 220 is provided with a second mounting hole 221, a third wire groove 222, and a fourth wire groove 223. Wherein, the second mounting hole 221 and the third wire groove 222 are both disposed along the width direction of the latch 220, and the second mounting hole 221 communicates with the third wire groove 222. The fourth wire groove 223 is provided along the length direction of the latch 220, and the fourth wire groove 223 communicates with both the second mounting hole 221 and the third wire groove 222.

Correspondingly, a second mounting head 330 is fixedly arranged at one end of the flexible stay wire 300 close to the lock tongue 220, and the second mounting head 330 is slidably arranged in the second mounting hole 221 in a penetrating manner.

When mounting, the second mounting head 330 is aligned with the second mounting hole 221, the flexible stay 300 is aligned with the third wire groove 222, and the second mounting head 330 is slid into the second mounting hole 221 in the width direction of the tongue 220. The second mounting head 330 and flexible cable 300 are then rotated to move the flexible cable 300 into the fourth wire slot 223. At this time, the second mounting head 330 is limited by the flexible stay 300 and cannot slide along the width direction of the latch 220, so as to connect the latch 220 and the flexible stay 300.

In addition, the flexible conduit 320 is provided with a stay wire fixing screw 323 near one end of the fixing sheet metal part. The stay wire fixing screw 323 is slidably disposed on the third end plate 212, and a stay wire fixing nut 324 is sleeved on the stay wire fixing screw 323. The stay wire fixing nut 324 is in threaded fit with the stay wire fixing screw 323, so that the flexible wire tube 320 is fixedly connected with the fixed sheet metal part.

Optionally, an end of the lock tongue 220 away from the flexible pull wire 300 is provided with a bevel 224, a side surface of the lock tongue 220 is provided with a sliding groove 225, and the sliding groove 225 is arranged along the length direction of the lock tongue 220.

When a plurality of battery packs 20 are stacked, the bevel 224 of the lock tongue 220 is abutted with the box body of the adjacent battery pack 20, so that the lock tongue 220 is extruded and retracted by utilizing the weight of the battery pack 20, and an operator is not required to twist the knob 121, so that the convenience is improved.

The sliding groove 225 is in sliding fit with the box body of the battery pack 20 where the locking device 10 is located, so as to prevent the lock tongue 220 from rotating, and ensure that the lock tongue 220 is always contacted with the box body of the adjacent battery pack 20 through the bevel 224.

Further, the latch 220 is provided with a avoidance groove 226. The avoidance groove 226 is disposed along the length direction of the lock tongue 220, and is communicated with the second mounting hole 221, and the second mounting head 330 is slidably engaged with the avoidance groove 226.

When the latch 220 is pressed and retracted by the weight of the battery pack 20, the length of the flexible cable 300 is fixed and cannot be retracted. At this time, the second mounting head 330 slides into the escape groove 226.

Referring to fig. 8 and 9 again, in some embodiments, a baffle 213 is disposed at the middle of the fixing sheet metal part, a latch 220 is slidably disposed on the baffle 213, and a step surface 227 is disposed on a sidewall of the latch 220. Accordingly, the return spring 230 is a compression spring, the return spring 230 is sleeved on the lock tongue 220, one end of the return spring 230 is abutted with the baffle 213, and the other end is abutted with the step surface 227.

Optionally, the latch bolt mechanism 200 also includes a check ring 240. The limit retainer 240 is clamped with the lock tongue 220 along the radial direction of the lock tongue 220, and the limit retainer 240 is located at one side of the baffle 213 opposite to the return spring 230.

When the latch 220 is not subjected to the traction force from the flexible pull wire 300, the latch springs are ejected under the elastic force of the return spring 230 until the limit retainer 240 abuts against the baffle 213. The limit retainer 240 can limit the distance that the lock tongue 220 pops up, preventing the lock tongue 220 from separating from the baffle 213.

In summary, when the above-described locking device 10 is used, the first and second mounting assemblies 110 and 210 are mounted on the battery pack 20 corresponding to the locking device 10. In the stacking process of the battery packs 20, the bevel 224 of the lock tongue 220 is abutted with the box body of the adjacent battery packs 20, is extruded and retracted firstly due to the weight of the battery packs 20, and then is ejected out under the driving of the reset spring 230 to be clamped with the adjacent battery packs 20, so that the rapid and automatic fixation between the battery packs 20 is realized.

In the post-maintenance replacement, the operator turns the knob 121 forward, and the slider 124 cooperates with the spiral groove 131 to convert the rotational movement of the knob 121 into the linear movement of the screw shaft 130 in the axial direction thereof. The screw shaft 130 further pulls the locking bolt 220 through the flexible stay wire 300, overcomes the elastic force of the return spring 230 to retract the locking bolt 220, and can release the fixation between the battery packs 20, thereby being convenient and quick to operate.

Example 2

Referring to fig. 11 to 13, the present embodiment provides a home energy storage system, which includes a battery pack 20 and the locking device 10. Wherein, the battery packs 20 are provided with at least two, and each battery pack 20 is stacked.

The locking device 10 is disposed corresponding to the battery pack 20, and the first and second mounting assemblies 110 and 210 are fixedly connected with the corresponding case of the battery pack 20. In addition, the latch 220 is engaged with the case of the connected battery pack 20 after being ejected.

In some embodiments, two locking devices 10 are provided corresponding to each battery pack 20, and the two locking devices 10 are distributed at opposite corners of the battery pack 20.

In other embodiments, the number of locking devices 10 corresponding to each battery pack 20 may be one, three, four, or the like.

Referring to fig. 12, alternatively, a boss 21 is provided at one end of the battery pack 20 in the vertical direction, and a locking hole 22 is provided at a side of the boss 21. The other end of the battery pack 20 along the vertical direction is provided with a groove 23, and the lock tongue 220 is slidably arranged on the side surface of the groove 23 and is clamped with the lock hole 22.

In some embodiments, the boss 21 is located at the top end of the battery pack 20 and the recess 23 is located at the bottom end of the battery pack 20. The latch 220 on the upper battery pack 20 engages with the latch hole 22 on the lower battery pack 20 to lock the two battery packs 20.

In other embodiments, the boss 21 may be disposed at the bottom end of the battery pack 20, and the groove 23 may be disposed at the top end of the battery pack 20, so that the latch 220 on the lower battery pack 20 is engaged with the latch hole 22 on the upper battery pack 20.

During stacking of the battery packs 20, the locking tabs 220 on the upper battery pack 20 initially protrude from the sides of the recess 23. When the upper battery pack 20 is stacked on the lower battery pack 20, the bevel 224 of the tongue 220 abuts against the boss 21 on the lower battery pack 20, and is pressed and retracted by the weight of the upper battery pack 20. After the boss 21 on the lower layer battery pack 20 is embedded with the groove 23 on the upper layer battery pack 20, the lock tongue 220 is aligned with the lock hole 22 on the lower layer battery pack 20 and is ejected out under the driving of the reset spring 230 to be clamped with the lock hole 22, so that the upper layer battery pack 20 and the lower layer battery pack 20 are quickly and automatically fixed.

In the later maintenance and replacement, an operator can forward screw the knob 121 on the upper layer battery pack 20, so that the fixation between the battery packs 20 can be released, and the operation is convenient and quick.

Any particular values in all examples shown and described herein are to be construed as merely illustrative and not a limitation, and thus other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

The above examples merely represent a few embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the present invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.

Claims (10)

1. The locking device is characterized by comprising a screwing mechanism, a spring bolt mechanism and a flexible stay wire;

the screwing mechanism comprises a first installation component, a screwing component and a screw shaft, wherein the screwing component is rotationally arranged on the first installation component, a sliding block is arranged on the screwing component, the screw shaft is slidably arranged on the first installation component, a screw groove is formed in the screw shaft, and the sliding block is slidably matched with the screw groove;

the spring bolt mechanism comprises a second installation component, a spring bolt and a return spring, wherein the spring bolt is arranged on the second installation component in a sliding manner, the return spring is arranged between the second installation component and the spring bolt, and the return spring is used for driving the spring bolt to pop up;

one end of the flexible stay wire is connected with the screw shaft, and the other end of the flexible stay wire is connected with the lock tongue.

2. The locking device according to claim 1, wherein a screwing-in-place piece is arranged on the screwing assembly, a screwing-in-place portion is arranged on the first mounting assembly, a clamping groove is formed in the screwing-in-place portion, and areas located on two sides of the clamping groove are in interference fit with the screwing-in-place piece;

the lock tongue is retracted when the screwing-in-place piece is clamped into the clamping groove.

3. The locking device according to claim 1, wherein a screwing-back limiting member is provided on the screwing assembly, and a screwing-back limiting portion is provided on the first mounting assembly;

the bolt pops up when the screwing-back limiting part is abutted with the screwing-back limiting part.

4. The locking device of claim 1, wherein the screw assembly is sleeved with a coil spring, one end of the coil spring is connected with the screw assembly, and the other end of the coil spring is connected with the first mounting assembly.

5. The locking device of any one of claims 1-4, wherein an end of the locking bolt remote from the flexible pull wire is provided with a bevel, a side of the locking bolt is provided with a chute, and the chute is arranged along the length direction of the locking bolt.

6. The locking device of claim 5, wherein the locking bolt is provided with an avoidance groove, and the flexible pull wire is in sliding fit with the avoidance groove.

7. The locking device according to any one of claims 1-4, wherein a baffle is provided on the second mounting assembly, the lock tongue is slidably inserted through the baffle, and a step surface is provided on a side wall of the lock tongue;

the spring return is sleeved on the lock tongue, one end of the spring return is abutted to the baffle, and the other end of the spring return is abutted to the step surface.

8. The locking device of claim 7, wherein the locking tongue is provided with a limit collar, and the limit collar is located on a side of the baffle facing away from the return spring.

9. A domestic energy storage system comprising a battery pack and a locking device as claimed in any one of claims 1 to 8;

the battery packs are provided with at least two battery packs, and the battery packs are stacked;

the locking device is arranged corresponding to the battery pack, the first installation component and the second installation component are fixedly connected with the corresponding battery pack, and the lock tongue is popped up and then is connected with the adjacent battery Bao Kage.

10. The household energy storage system as claimed in claim 9, wherein one end of the battery pack along the vertical direction is provided with a boss, and a lock hole is formed on the side surface of the boss;

the battery package is equipped with the recess along the other end of vertical direction, the spring bolt slides and wears to locate the side of recess, the spring bolt with the lockhole block.