A connection mechanism for quickly disconnecting battery modules

Abstract

The present invention provides a connection mechanism for quickly disconnecting the connection between battery modules, and the connection mechanism includes multiple nuts, nut sleeves, and a parallel disconnection member. Each nut is composed of at least two nut petals, and the nut petals can be bundled into a complete nut by the sleeve connection of the nut sleeve, so that it can be threadedly connected with the bolt; the nut petals can be dispersed by opening or moving the nut sleeve, so that the threaded connection with the bolt can be quickly released without screwing. The parallel disconnection member can fix multiple nut sleeves at the same time or release the fixation of multiple nut sleeves at the same time, so as to open multiple nut sleeves at the same time, thereby realizing the rapid disconnection of multiple connection positions between battery modules. Furthermore, in the event of a safety failure of the battery, the connection between the battery modules is quickly disconnected, and the battery with the safety failure is quickly removed to avoid the combustion and explosion of the faulty battery causing the combustion and explosion of the entire battery module or even the entire container.

Description

Technical Field

[0001] The invention relates to the field of energy storage batteries, and in particular to a connection mechanism for quickly disconnecting connections between battery modules. Background Art

[0002] Battery modules in energy storage systems are usually arranged in a dense manner. In the event of thermal runaway, emergency response is carried out by relying on battery safety management and fire control systems. The fire safety system currently configured in energy storage systems will handle the modules when an accident occurs. Since it is difficult to contain the spread of fire inside the modules due to the outside-in approach, and the battery modules are closely arranged, if local combustion occurs, all battery modules in the energy storage system may eventually be scrapped due to the fire or the effect of fire extinguishing agents.

[0003] If emergency intervention can be carried out in time to remove and isolate the problem module at the beginning of thermal runaway of the battery module in the energy storage system, on the one hand, the accident can be handled more effectively, and on the other hand, even if the fire is not extinguished, the heat diffusion from the out-of-control module to the surrounding modules can be controlled as much as possible, and the spread of out-of-control can be controlled to the maximum extent to reduce losses. However, in order to ensure the reliability of electrical connections between battery modules, most energy storage systems are currently connected and fixed with bolt connectors. Even if the monitoring system identifies that the battery module has thermal runaway or combustion risks, it is difficult to quickly cut off the physical connection between the problem module and the surrounding modules, which hinders the isolation and processing of the problem module. Summary of the invention

[0004] In view of the above problems, the present invention provides a connection mechanism for quickly disconnecting the connection between battery modules, which connection mechanism includes multiple nuts, nut sleeves and a series of disconnecting components. Each nut is composed of at least two nut petals, which can be bundled into a complete nut by the sleeve connection of the nut sleeve, so that it can be threadedly connected with the bolt; the nut petals can be dispersed by opening or moving the nut sleeve, so that the threaded connection with the bolt can be quickly released without screwing. The series of disconnecting components can fix multiple nut sleeves at the same time or release the fixation of multiple nut sleeves at the same time, so as to open multiple nut sleeves at the same time, thereby realizing the rapid disconnection of multiple connection positions between battery modules. Furthermore, in the event of a safety failure of the battery, the connection between the battery modules is quickly disconnected, and the battery with the safety failure is quickly removed to avoid the combustion and explosion of the faulty battery causing the combustion and explosion of the entire battery module or even the entire container.

[0005] The technical solution provided by the present invention is as follows:

[0006] According to the present invention, a connection mechanism for quickly disconnecting the connection between battery modules is provided, and the connection mechanism includes: a plurality of nuts, each nut is composed of at least two nut petals; a nut sleeve, the nut sleeve includes a sleeve portion and a constraint portion, the sleeve portion can be sleeved on the nut to bundle at least two nut petals of each nut into a nut, and the constraint portion is arranged on the sleeve portion to constrain the opening or movement of the sleeve portion; a connecting disconnection member, the connecting disconnection member includes a retaining portion and a connecting unlocking portion, the retaining portion can fix the constraint portion, the connecting unlocking portion is connected to a plurality of retaining portions, and by moving the connecting unlocking portion, the plurality of retaining portions can be simultaneously moved to release the fixation of the plurality of retaining portions to the plurality of constraint portions, so that the plurality of sleeve portions can be opened or moved and the plurality of nuts are respectively dispersed into nut petals. Specifically, the nuts commonly used for connection between battery modules can adopt the connection structure of the present invention. During installation, the retaining portion of the coupled disconnecting member is used to fix the restraining portion of the nut sleeve, thereby restraining the opening or movement of the sleeve portion of the nut sleeve, so that the sleeve portion of the nut sleeve is in a closed or immovable state, so that the multiple nut petals located in the sleeve portion of the nut sleeve are in a state of an integral nut, and can be normally threadedly connected with the bolt. When a battery fails, there is no need to screw multiple bolts to disconnect the connection between the battery modules. It is only necessary to move the coupled unlocking portion of the coupled disconnecting member so that the multiple retaining portions connected to the coupled unlocking portion move at the same time, thereby releasing the fixation of the multiple retaining portions to the multiple restraining portions, thereby enabling the sleeve portion to open or move, so that the multiple nut petals located in the sleeve portion are in a dispersed state and quickly disengage from the threaded connection with the bolt. That is to say, the connection mechanism includes three parts: a nut composed of multiple nut petals; a nut sleeve composed of at least a sleeve portion and a constraint portion, wherein the sleeve portion is sleeved on the outside of the nut for the nut petals to form a whole or spread, and the constraint portion is arranged on the sleeve portion to limit the opening or movement of the sleeve portion, and the constraint portion can be in various forms such as fins, clamping parts, hinges, and sockets; a coupling disconnection member composed of at least a coupling unlocking portion and multiple retaining portions, the coupling unlocking portion is connected to the multiple retaining portions, and the movement of the coupling unlocking portion will cause the multiple retaining portions to move almost simultaneously, and the multiple retaining portions can respectively fix the multiple constraint portions, and the fixation of the constraint portion can be released by removing the retaining portion. In the case of small nuts and bolts, the use of nut sleeves can have significant advantages, so that it is not limited by the size of the nut, and a firm and reliable constraint portion can be set on a larger nut sleeve. The shape of the inner hole of the nut sleeve matches the shape of the nut, so that the inner hole of the nut sleeve can just tighten the entire nut. The parallel disconnect components can realize the simultaneous disconnection of multiple connection parts, thereby greatly saving the time used for dismantling multiple connection parts and better ensuring the safety of the entire system and personnel in the event of battery failure.

[0007] The sleeve connection portion of the nut sleeve may be an integral structure or a split structure. When the sleeve connection portion of the nut sleeve is an integral structure, the nut petal may be constrained or released by moving the sleeve connection portion up and down; when the sleeve connection portion of the nut sleeve is a split structure, the nut petal may be constrained or released by merging or opening the sleeve connection portion.

[0008] The sleeve portion of the nut sleeve may include a first sleeve portion and a second sleeve portion, and the nut petals of the nut can be constrained by combining the first sleeve portion and the second sleeve portion, and the constraints on the nut petals of the nut can be released by separating the first sleeve portion and the second sleeve portion. The structures of the first sleeve portion and the second sleeve portion may be the same or different, as long as the first sleeve portion and the second sleeve portion can constrain all the nut petals into a complete nut after being combined. In a preferred embodiment, the first sleeve portions of multiple nut sleeves are an integrated structure, and the second sleeve portions of multiple nut sleeves are an integrated structure, so that multiple sleeve portions can be opened at the same time through a single operation, thereby quickly releasing the constraints of the multiple sleeve portions on the nut petals.

[0009] In one embodiment, the constraint portion of the nut sleeve may be a first wing extending outward from the first sleeve portion and a second wing extending outward from the second sleeve portion, the retaining portion of the linked disconnecting member may include a first clamping portion and a second clamping portion, the first clamping portion and the second clamping portion are hinged at one end and the other end is provided with a first protrusion and a second protrusion, respectively, the first protrusion and the second protrusion are respectively provided with through holes, the first clamping portion and the second clamping portion can clamp the first fin and the second fin, and the linked unlocking portion of the linked disconnecting member is a long wire or stick, etc., and the wire or stick can be inserted into the through hole. That is, the first sleeve portion is provided with a first wing extending outward on both sides, and the second sleeve portion is provided with a second wing extending outward on both sides, and the first fin and the second fin are the constraint portions. When the first sleeve portion and the second sleeve portion are combined, an inner hole for sleeve the nut is formed, the first fin on one side of the sleeve portion is fitted with the second fin, and the first fin on the other side of the sleeve portion is fitted with the second fin. The fins may be provided with components for quickly positioning the first fin and the second fin, such as protrusions and recesses, plugs and sockets, positioning blocks and positioning grooves, and the like. The coupling disconnecting component may have two retaining portions, which are respectively used to fix the fins on both sides of the sleeve portion. On either side of the sleeve portion, the first clamping portion and the second clamping portion form a clamping structure for clamping the merged first fin and the second fin, thereby constraining the sleeve portion into a merged state. The clamping holding state of the first clamping portion and the second clamping portion is achieved by inserting a long wire or stick into the through hole of the protrusion. When the wire or stick serving as the coupling unlocking portion is pulled out of the through hole of the protrusion, the first clamping portion and the second clamping portion are opened, releasing the fixation of the fins, thereby releasing the fixation of the sleeve portion.

[0010] In another embodiment, the constraint portion of the nut sleeve can be a first fin extending outward from the first sleeve portion and a second fin extending outward from the second sleeve portion, a protrusion / insertion hole is provided on the first fin, an insertion hole / protrusion is provided on the second fin, a slot is provided on the protrusion, the protrusion can be inserted into the insertion hole, the retaining portion of the coupled disconnecting member includes a plug-in, the plug-in can be inserted into the slot, the coupled unlocking portion of the coupled disconnecting member is a long strip of plate, and the plug-in is fixedly connected to the plate. In other words, the first sleeve portion is respectively provided with first fins extending outward on both sides, and the second sleeve portion is respectively provided with second fins extending outward on both sides, and the first fin and the second fin are the constraint portions. When the first sleeve portion and the second sleeve portion are combined, an inner hole for sleeveing ​​the nut is formed, the first fin on one side of the sleeve portion is fitted with the second fin, and the first fin on the other side of the sleeve portion is fitted with the second fin. On either side of the sleeve portion, the first fin may be provided with a protrusion or an insertion hole, and correspondingly, the second fin may be provided with an insertion hole or a protrusion, the protrusion may be inserted into the insertion hole and be in a protruding state, and a slot is provided in the protrusion, and the slot may or may not penetrate the protrusion. The row unlocking part is a long strip of plate, or a stick, a rope or a broken line shape, etc. A plurality of plug-ins are fixedly connected to the long strip of row unlocking part, and the position of each plug-in corresponds to the position of the slot of each protrusion, so that the plug-in can be inserted into the slot to fix the combined first fin and the second fin. When the long strip of plate as the row unlocking part is moved away from the nut sleeve, the plug-in is pulled out of the slot, the fixation of the fin is released, and then the fixation of the sleeve portion is released. In a preferred embodiment, the plug-in is provided with a weak portion and the lower end of the plug-in is provided with a hook-shaped portion, the hook-shaped portion can prevent the plug-in from falling off from the slot, and the tensile strength of the material of the weak portion is less than the tensile strength of the material of the other parts of the plug-in. Under normal working conditions, since the hook portion is stuck in the bottom of the slot, slight movement will not cause the plug-in to fall off the slot; when it is necessary to release the constraint of the nut sleeve, it is only necessary to pull the coupling unlocking portion hard, the weak portion will break, and the plug-in will fall off the slot. The weak portion can be, for example, a welding portion, an adhesive portion, or a punched portion.

[0011] In another embodiment, the bottoms of two adjacent first sleeve parts are connected and the two sides of each first sleeve part are provided with side walls extending upward, the tops of two adjacent second sleeve parts are connected and each second sleeve part can be inserted between the side walls on both sides of the first sleeve part, the constraint part and the first sleeve part are an integral structure, and an integral insertion channel is formed at the top of the second sleeve part and between the constraint part and the first sleeve part, the row disconnecting member is a plug post with a protruding portion, the protruding portion is a retaining portion that clamps the constraint part, and the plug post is a row unlocking portion, and by moving the row unlocking portion, the protruding portion moves away from the constraint part, so that the first sleeve part moves downward. In other words, the tops of the multiple second sleeve parts and the constraint parts and the side walls of the first sleeve parts together form a tubular channel extending along the arrangement direction of the multiple nut sleeves. A plug with a raised portion is inserted into the channel, wherein the raised portion can be located below the constraint portion so that the first sleeve portion is located at an upper position so as to merge with the second sleeve portion, and the raised portion can also be moved away from below the constraint portion so that the constraint portion and the first sleeve portion move downward to a lower position together so that the first sleeve portion is separated from the second sleeve portion.

[0012] When the retaining part releases the fixation of the constraint part, the first sleeve part can be manually separated from the second sleeve part. Preferably, an elastic member or a repulsive member can be provided between the adjacent parts of the first sleeve part and the second sleeve part of the nut sleeve. When the retaining part releases the fixation of the constraint part, the first sleeve part and the second sleeve part can be automatically separated without manual operation through the elastic force of the elastic member or the repulsive force of the repulsive member. The elastic member can be, for example, a spring, an elastic rubber block, etc., and the repulsive member can be, for example, a pair of magnets with the same magnetic poles facing each other, etc. The elastic member or the repulsive member is arranged so that the direction of the elastic force or repulsive force generated is consistent with the direction of separation of the first sleeve part and the second sleeve part.

[0013] According to the present invention, the nut sleeve can also be an integrated structure, the nut sleeve can move up and down relative to the nut, the constraint portion of the nut sleeve is a constraint through hole set on the nut sleeve, a concave hole or groove is provided at the position of the nut corresponding to the constraint through hole, the retaining portion of the linked disconnection member is a plug that can be inserted into the constraint through hole and the concave hole / groove, and the linked unlocking portion is connected to multiple plugs. When the plug is inserted into the constraint through hole and the concave hole / groove, the nut sleeve is relatively fixed to the nut, and the nut sleeve bundles the nut petals into an integral nut. When the plug is pulled out of the constraint through hole and the concave hole / groove, the nut sleeve can move up and down relative to the nut and disengage, and the nut is dispersed into nut petals when the nut sleeve no longer constrains the nut. The linked unlocking portion can be in the form of a stick, a rope, a lath, etc., and the linked unlocking portion is fixedly connected to multiple plugs. By pulling the linked unlocking portion, multiple plugs can be pulled at the same time, thereby achieving the purpose of quickly releasing the constraints of multiple nut sleeves.

[0014] In addition, a plurality of nut sleeves can be connected to each other through a rope-shaped or stick-shaped connecting portion. In this way, it is not necessary to move each nut sleeve separately, but only the rope-shaped or stick-shaped connecting portion needs to be pulled to move a plurality of nut sleeves at the same time, thereby further speeding up the disassembly of the nut sleeves.

[0015] Preferably, the nut sleeve is a sleeve with a top, and an elastic member or a repulsive member may be provided between the top of the nut sleeve and the nut. When the retaining portion releases the fixation of the constraint portion, the nut sleeve and the nut can be separated automatically and manually by the elastic force of the elastic member or the repulsive force of the repulsive member. The elastic member may be, for example, a spring, an elastic rubber block, etc., and the repulsive member may be, for example, a pair of magnets with the same magnetic poles facing each other. The elastic member or the repulsive member is arranged so that the direction of the elastic force or repulsive force generated is consistent with the direction of separation of the nut sleeve and the nut.

[0016] It should be pointed out here that the directional words such as up, down, left, and right in the present invention are only used to make the description clearer and do not play any limiting role.

[0017] The advantages of the present invention are:

[0018] 1) While retaining the original bolt connector function, a quick disconnect structure is added to cut off the physical connection between the faulty module and the surrounding modules in a short time, which buys time for timely removal and isolation of the faulty module, helps to extinguish the fire in the early stage and reduce fire losses;

[0019] 2) The threaded connection structure of the connection mechanism ensures that the electrical connection is reliable during the use of the battery module, and the quick disconnect structure of the connection mechanism avoids the complicated operation and time-consuming process of threaded connection disassembly;

[0020] 3) The parallel disconnection components of the connection structure can achieve quick disconnection of multiple connections at the same time with a single trigger, which facilitates the quick removal of multiple or multiple groups of battery modules, greatly saving the disassembly time of multiple connection points;

[0021] 4) By setting elastic parts and repulsive parts, the automatic separation and disconnection of the connection mechanism can be achieved without human intervention after the disconnection is triggered. In combination with additional mechanical devices, the faulty battery module can be removed without human intervention throughout the process, reducing the risk of emergency intervention by personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1(a)-Figure 1(b) A schematic diagram of the connection between battery modules according to the present invention;

[0023] Figure 2(a)-Figure 2(c) is a schematic diagram of a connecting mechanism according to a first embodiment of the present invention;

[0024] Figure 3(a)-Figure 3(c) is a schematic diagram of a connecting mechanism according to a second embodiment of the present invention;

[0025] Figure 4(a)-Figure 4(d) is a schematic diagram of a connecting mechanism according to a third embodiment of the present invention;

[0026] Figure 5(a)-Figure 5(c) Schematic diagram of a connecting mechanism according to a fourth embodiment of the present invention.

[0027] Reference numerals list

[0028] 1a, 1b - Batteries

[0029] 2a, 2b - electrode column

[0030] 3——Electrical connector

[0031] 4——Connection mechanism

[0032] 5. Bolts

[0033] 6——Nut

[0034] 6a——Nut flap

[0035] 7——Nut sleeve

[0036] 8——Socketing part

[0037] 801a——First socket part

[0038] 801b——Second socket

[0039] 802——Sidewall

[0040] 9 - Constraints

[0041] 901a——First fin

[0042] 901b——Second fin

[0043] 902——Insertion hole

[0044] 903 - The Bulge

[0045] 904 - Slot

[0046] 905——Constrained through hole

[0047] 906——Groove

[0048] 10——Maintenance

[0049] 1001a——First clamping part

[0050] 1001b——Second clamping part

[0051] 1002a——First protrusion

[0052] 1002b——Second protrusion

[0053] 1003 - Plugins

[0054] 1004——Protrusion

[0055] 1005——Bolt

[0056] 11——Town unlocking unit

[0057] 1101——Stick

[0058] 1102——Board

[0059] 1103——Pillar

[0060] 1104——Flexible board

[0061] 12——Elastic parts DETAILED DESCRIPTION

[0062] The present invention will be further described below by way of embodiments in conjunction with the accompanying drawings.

[0063] Figure 1(a)-Figure 1(b) It is a schematic diagram of the connection between battery modules according to the present invention. The figure takes the electrical connection of two batteries as an example, and it should be understood that more batteries can also be electrically connected. The electrode column 2a of the upper battery 1a and the electrode column 2b of the lower battery 1b are fitted with the electrical connector 3 and connected by the connecting mechanism 4 and multiple bolts 5 of the present invention. When the connecting mechanism of the present invention is adopted, since the connecting mechanism 4 realizes the threaded connection of multiple connection points at the same time, it is preferred that the threaded connection of the connection points is realized without rotating the nuts of the multiple connection points. For example, holes for the bolts 5 to pass through are provided on the electrode columns 2a, 2b and the electrical connector 3. The bolts 5 pass through the holes on the electrode columns 2a, 2b and the electrical connector 3 and are threadedly connected to the nuts of the connecting mechanism 4. The threaded connection can be completed by rotating the bolts 5 without rotating the nuts. This provides a convenient connection method in the connection structure in which multiple nuts are connected in a row.

[0064] Figure 2(a)-Figure 2(c)It is a schematic diagram of a connection mechanism according to the first embodiment of the present invention. Among them, Figure 2 (a) is a connection mechanism in a normal working state, Figure 2 (b) is a state when the connecting disconnecting member is released, and Figure 2 (c) is a state when the nut sleeve is opened. In this embodiment, the sleeve portion 8 of the nut sleeve includes a first sleeve portion 801a and a second sleeve portion 801b, and first fins 901a extending outward are respectively provided on both sides of the first sleeve portion 801a, and second fins 901b extending outward are respectively provided on both sides of the second sleeve portion 801b. The first fin 901a and the second fin 901b are the restraining portion 9 of the nut sleeve, and the first fin 901a and the second fin 901b are provided with positioning blocks and positioning holes for quick positioning. Multiple first sleeve portions 801a and their first fins 901a are an integrated structure, and multiple second sleeve portions 801b and their second fins 901b are an integrated structure. The holding portion 10 of the connecting disconnecting member includes a first clamping portion 1001a and a second clamping portion 1001b, one end of the first clamping portion 1001a and the second clamping portion 1001b are hinged and the other ends are respectively provided with a first protrusion 1002a and a second protrusion 1002b, and the first protrusion 1002a and the second protrusion 1002b are respectively provided with through holes. The connecting unlocking portion 11 of the connecting disconnecting member is a long stick 1101, and the long stick 1101 can be inserted into the through hole.

[0065] Under normal working conditions, the long stick 1101 is inserted into the through holes of the first protrusion 1002a and the second protrusion 1002b, so that the first clamping part 1001a and the second clamping part 1001b are in a clamped state, and the first fin 901a and the second fin 901b that fit together are fixed, thereby ensuring that the first sleeve part 801a and the second sleeve part 801b remain combined, and then the multiple nut petals 6a are in a state of an integral nut. In this way, the nut and the bolt can be threadedly connected normally.

[0066] When one or some battery cells fail, it is necessary to remove multiple connecting parts between modules at the same time. The long stick 1101 is taken out from the through holes of the first protrusion 1002a and the second protrusion 1002b, so that the first clamping part 1001a and the second clamping part 1001b are in an open state, and the fixation between the first fin 901a and the second fin 901b is released, so that the first sleeve part 801a and the second sleeve part 801b can be opened, so that the overall nut is in a state of multiple dispersed nut petals 6a. In this way, the threaded connection between multiple nuts and multiple bolts can be quickly released.

[0067] Figure 3(a)-Figure 3(c)3(a) is a schematic diagram of a connection mechanism according to a second embodiment of the present invention, wherein FIG3(a) is a connection mechanism in a normal working state, FIG3(b) is a state when the connecting disconnecting member is released from fixation, and FIG3(c) is a state when the nut sleeve is opened. In this embodiment, the sleeve portion 8 of the nut sleeve includes a first sleeve portion 801a and a second sleeve portion 801b, first fins 901a extending outward are respectively provided on both sides of the first sleeve portion 801a, and second fins 901b extending outward are respectively provided on both sides of the second sleeve portion 801b, and insertion holes 902 and protrusions 903 are respectively provided on the first fins 901a on both sides of the nut sleeve, and protrusions 903 and insertion holes 902 are respectively provided on the second fins 901b on both sides of the nut sleeve. When the first fins 901a and the second fins 901b are attached, the protrusions 903 of the first fins 901a are inserted into the insertion holes 902 of the second fins 901b, and the protrusions 903 of the second fins 901b are inserted into the insertion holes 902 of the first fins 901a. A slot 904 is provided in the protrusion 903, and the slot 904 passes through the protrusion 903. The first fin 901a, the second fin 901b, the insertion hole 902 and the protrusion 903 are the constraint part 9 of the nut sleeve. An elastic member 12 is arranged between the first fin 901a and the second fin 901b. The row unlocking part 11 is a long strip plate 1102, and the retaining part 10 is a plurality of plug-ins 1003, which are fixedly connected to the long strip plate 1102, and the position of each plug-in 1003 corresponds to the position of the slot 904 of each protrusion 903. The cross section of the plug-in 1003 is J-shaped, and a hook is provided at the lower end of the plug-in 1003. The hook can be connected to the main body of the plug-in through a weak portion formed by welding. When the plug-in 1003 is inserted into the slot 904, the hook is used to prevent the plug-in 1003 from coming out of the slot 904.

[0068] Under normal working conditions, the plug 1003 is inserted into the slot 904 of the protrusion 903 to fix the fitted first fin 901a and the second fin 901b, thereby ensuring that the first sleeve portion 801a and the second sleeve portion 801b remain combined, and the plurality of nut petals 6a are in a state of an integral nut. In this way, the nut and the bolt can be threadedly connected normally.

[0069] When one or some battery cells fail, it is necessary to remove multiple connecting parts between modules at the same time. Pull the long strip plate 1102 hard to break the weak part of the plug-in 1003 (not shown in the figure), pull the plug-in 1003 out of the slot 904, release the fixation between the first fin 901a and the second fin 901b, and use the elastic force of the elastic member 12 between the first fin 901a and the second fin 901b to automatically open the first sleeve part 801a and the second sleeve part 801b, so that the whole nut is in a state of multiple dispersed nut petals 6a. In this way, the threaded connection between multiple nuts and multiple bolts can be quickly released.

[0070] Figure 4(a)-Figure 4(d) It is a schematic diagram of a connection mechanism according to the third embodiment of the present invention. Among them, Figure 4 (a) and Figure 4 (b) are schematic diagrams (whole and partial cross-section) of the connection mechanism under normal working conditions, Figure 4 (c) is the state when the connecting disconnecting member is released (partial cross-section), Figure 4 (d) is the state when the nut sleeve is opened (partial cross-section), and the partial cross-section views in Figures 4 (b)-4 (d) are to better show the internal structure of the connection mechanism. In this embodiment, the sleeve portion 8 of the nut sleeve includes a first sleeve portion 801a and a second sleeve portion 801b, and multiple first sleeve portions 801a are connected. Side walls 802 extending upward are provided on both sides of each sleeve portion, and an L-shaped constraint portion 9 is provided above the side wall 802. The side of the constraint portion 9 is fixedly connected to the top of the side wall 802, and a space is left between the top of the constraint portion 9 and the top of the side wall 802. A plurality of second sleeve portions 801b are connected, and each second sleeve portion 801b can be inserted between the side walls 802 on both sides of the first sleeve portion, so that the first sleeve portion 801a and the second sleeve portion 801b form a complete inner hole for accommodating the nut. An integral insertion channel is formed at the top of the second sleeve portion 801b and between the constraint portion 9 and the side wall 802. The row disconnecting member is a plug column 1103 provided with a raised portion 1004, and the plug column 1103 can be inserted into the insertion channel formed by the first sleeve portion and the second sleeve portion. The spacing distance between the raised portions 1004 is consistent with the spacing distance between the constraint portions 9. The raised portion 1004 is a retaining portion 10 that clamps the constraint portion 9, and the row unlocking portion 11 is a plug column 1103.

[0071] Under normal working conditions, the plug post 1103 is inserted into the insertion channel, and the raised portion 1004 can be located below the constraint portion 9, so that the first sleeve portion 801a is located at an upper position to be merged with the second sleeve portion 801b, thereby making the multiple nut petals 6a in a state of an integral nut. In this way, the nut and the bolt can be threadedly connected normally.

[0072] When one or some battery cells fail, it is necessary to remove multiple connecting parts between modules at the same time. Pull the plug 1103, and the raised part 1004 moves away from the bottom of the constraint part 9, so that the constraint part 9 and the first sleeve part 801a move downward to a lower position together so that the first sleeve part 801a is separated from the second sleeve part 801b, so that the whole nut is in a state of multiple dispersed nut petals 6a. In this way, the threaded connection between multiple nuts and multiple bolts can be quickly released.

[0073] Figure 5(a)-5(c) It is a schematic diagram of a connection mechanism according to the fourth embodiment of the present invention. Among them, Figure 5(a) is a connection mechanism under normal working conditions, Figure 5(b) is a state when the coupling disconnection member is released, and Figure 5(c) is a state after the nut sleeve moves away. In this embodiment, the nut sleeve 7 is an integrated structure, the nut sleeve 7 can move up and down relative to the nut 6, and the nut sleeve 7 is cylindrical. The restraining portion 9 of the nut sleeve is a restraining through hole 905 provided on the nut sleeve, and a groove 906 is provided at a position of the nut corresponding to the restraining through hole 905. The retaining portion 10 of the coupling disconnection member is a plug 1005 that can be inserted into the restraining through hole 905 and the groove, and the coupling unlocking portion 11 is a flexible plate 1104, and the flexible plate 1104 is connected to a plurality of plugs 1005.

[0074] Under normal working conditions, the plug 1005 is inserted into the constraint through hole 905 and the groove 906, and the nut sleeve 7 is relatively fixed to the nut 6, so that the multiple nut petals 6a are in the state of an integral nut. In this way, the nut and the bolt can be threadedly connected normally, and the nut here can rotate independently. Afterwards, the multiple plugs 1005 are connected to the flexible board 1104.

[0075] When one or some battery cells fail, it is necessary to remove multiple connection parts between modules at the same time. Pull the flexible plate 1104 to pull the plug 1005 out of the constraint through hole 905 and the groove 906, and move the nut sleeve 7 to disengage the nut 6, so that the whole nut is in a state of multiple dispersed nut petals 6a. In this way, the threaded connection between multiple nuts and multiple bolts can be quickly released.

[0076] The specific embodiments of the present invention are not intended to limit the present invention. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A connection mechanism for quickly disconnecting the connection between battery modules, characterized in that: The connecting mechanism includes: a plurality of nuts, each of which is composed of at least two nut petals; a nut sleeve, the nut sleeve including a sleeve connection portion and a constraint portion, the sleeve connection portion can be sleeved on the nut to bundle the at least two nut petals of each nut into a nut, and the constraint portion is arranged on the sleeve connection portion to constrain the opening or movement of the sleeve connection portion; a coupled disconnecting member, the coupled disconnecting member including a retaining portion and a coupled unlocking portion, the retaining portion can fix the constraint portion, the coupled unlocking portion is connected to the plurality of retaining portions, and the plurality of retaining portions can be moved simultaneously by moving the coupled unlocking portion to release the fixation of the plurality of retaining portions to the plurality of constraint portions, thereby allowing the plurality of sleeve connection portions to be opened or moved and allowing the plurality of nuts to be dispersed into nut petals respectively.

2. The connection mechanism according to claim 1, wherein: The sleeve connection portion of the nut sleeve includes a first sleeve connection portion and a second sleeve connection portion. The nut petals of the nut can be constrained by combining the first sleeve connection portion and the second sleeve connection portion, and the constraints on the nut petals of the nut can be released by separating the first sleeve connection portion and the second sleeve connection portion.

3. The connection mechanism according to claim 2, wherein: The first sleeve connection parts of the plurality of nut sleeves are an integrated structure, and the second sleeve connection parts of the plurality of nut sleeves are an integrated structure.

4. The connection mechanism according to claim 2 or 3, wherein: The restraining portion is a first fin extending outward from the first sleeve portion and a second fin extending outward from the second sleeve portion. The retaining portion of the coupled disconnecting member includes a first clamping portion and a second clamping portion. The first clamping portion is hinged to one end of the second clamping portion and the other end is respectively provided with a first protrusion and a second protrusion. The first protrusion and the second protrusion are respectively provided with through holes. The first clamping portion and the second clamping portion can clamp the first fin and the second fin. The coupled unlocking portion of the coupled disconnecting member is a long wire or stick, which can be inserted into the through hole.

5. The connection mechanism according to claim 2 or 3, wherein: The restraining portion is a first fin extending outward from the first sleeve portion and a second fin extending outward from the second sleeve portion. A protrusion / insertion hole is provided on the first fin, an insertion hole / protrusion is provided on the second fin, a slot is provided on the protrusion, and the protrusion can be inserted into the insertion hole. The retaining portion of the coupling disconnecting component includes a plug-in, and the plug-in can be inserted into the slot. The coupling unlocking portion of the coupling disconnecting component is a long strip of plate, and the plug-in is fixedly connected to the plate.

6. The connection mechanism according to claim 5, wherein: The plug-in is provided with a weak portion and a hook portion is provided at the lower end of the plug-in, the hook portion can prevent the plug-in from falling off the slot, and the tensile strength of the material of the weak portion is lower than the tensile strength of the material of other parts of the plug-in.

7. The connection mechanism according to claim 3, wherein: The bottoms of two adjacent first sleeve parts are connected and each of the two sides of the first sleeve parts is provided with side walls extending upwards, the tops of two adjacent second sleeve parts are connected and each of the second sleeve parts can be inserted between the side walls on both sides of the first sleeve part, the constraint part and the first sleeve part are an integral structure, and an integral insertion channel is formed at the top of the second sleeve part and between the constraint part and the first sleeve part, the connecting disconnecting member is a column with a raised part, the raised part is a retaining part that clamps the restraining part, and the column is the connecting unlocking part, and by moving the connecting unlocking part, the raised part moves away from the retaining part of the restraining part, so that the first sleeve part moves downward.

8. According to the connection mechanism of claim 2 or 3, an elastic member or a repulsive member is provided between adjacent parts of the first sleeve connecting portion and the second sleeve connecting portion of the nut sleeve.

9. The connection mechanism according to claim 1, wherein: The nut sleeve is an integral structure, and the nut sleeve can move up and down relative to the nut. The constraint portion of the nut sleeve is a constraint through hole arranged on the nut sleeve, and a concave hole / groove is provided at a position of the nut corresponding to the constraint through hole. The retaining portion of the linked disconnecting component is a plug that can be inserted into the constraint through hole and the concave hole / groove, and the linked unlocking portion is connected to a plurality of the plugs.

10. The connection mechanism according to claim 9, wherein: The plurality of nut sleeves are connected to each other via a rope-shaped or stick-shaped connecting portion.

11. The connection mechanism according to claim 9, wherein: The nut sleeve is a sleeve with a top, and an elastic member or a repulsive member is arranged between the top of the nut sleeve and the nut.

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