BMS connector

Abstract

The utility model discloses a BMS (Battery Management System) connector, which is used for being plugged with a plug-in connector provided with an unlocking block, and comprises an insulating shell and a retainer, the insulating shell comprises a main body part, a locking arm and a partition wall connected between the main body part and the locking arm; a first stop surface is arranged at the rear end of the partition wall, a slot is formed between the partition wall and the main body part, and the upper wall surface of the slot is concavely arranged upwards to form a second stop surface; the retainer moves between a pre-locking position and a final locking position; the retaining piece comprises a base part, a tongue piece capable of elastically bending, a top stop block and a clamping stop block on the tongue piece; the first stopping surface stops the clamping block so as to keep the retaining piece at the pre-locking position; when the BMS connector is plugged with the plug-in connector, the tongue piece is pressed by the unlocking block to bend, the clamping block moves downwards to avoid the first stop surface, and the retainer can move forwards to a final locking position. By detecting whether the retainer can move to the final locking position or not, the function of detecting whether insertion is in place or not is added in the BMS connector.

Description

TECHNICAL FIELD

[0001] The utility model relates to BMS connector technical field, especially a kind of BMS connector that can detect and whether to be in place with plug-in connector plug-in. BACKGROUND

[0002] BMS (Battery Management System) is a battery management system, for managing the charge-discharge condition of charging battery or storage battery, to improve the utilization of battery, prevent the overcharge or overdischarge condition of battery, the field involved by BMS includes electric vehicle, electric car, robot or unmanned aerial vehicle etc. field.BMS system needs to use more connector, BMS connector is usually used to be plugged with a compatible plug-in connector to carry out the transmission of current or signal.

[0003] The existing BMS connector is mutually clamped and fixed by a lock catch arm after being plugged with plug-in connector, BMS connector is not provided with CPA (Connector Position Assurance, connector position retaining member) additionally, but with the development of some fields such as electric vehicle, the efficiency requirement of battery charge-discharge is higher and higher, which makes some BMS connectors be provided with CPA retaining member to stop lock catch arm, to prevent BMS connector and plug-in connector from disengaging due to lock catch arm error touch after being plugged.But the CPA retaining member on the existing BMS connector only has the stopping effect of lock catch arm, does not have the detection effect of whether BMS connector and plug-in connector are plugged in place, and BMS connector and plug-in connector are not plugged in place, which causes great hidden trouble to battery management system, for example, new energy vehicle power failure or abnormal signal feedback of battery management system etc.

[0004] Therefore, it is necessary to design an improved BMS connector to overcome the above problems. UTILITY MODEL CONTENTS

[0005] In view of the problems faced by the background art, the utility model aims at providing a kind of BMS connector, by setting interval wall between the main part of insulating shell and lock catch arm, the rear end of interval wall is provided with a first stop surface, the front end of retaining member's tongue piece is provided with a locking block, the first stop surface is stopped at the front side of locking block to keep retaining member in pre-lock position, when BMS connector is plugged with plug-in connector to predetermined position, tongue piece will be elastically deflected under the action of unlocking block pressing, and then make locking block avoid first stop surface to remove stop, retaining member can be moved to final lock position, by judging whether retaining member can be moved to final lock position, whether BMS connector and plug-in connector are plugged in place can be detected, to solve the problem of BMS connector and plug-in connector not being plugged in place.

[0006] To achieve the above object, the utility model adopts the following technical means:

[0007] A BMS connector is used for being inserted with a pair of plug connectors along the front-back direction, and an unlocking block is arranged on the pair of plug connectors, characterized in that the BMS connector comprises:

[0008] An insulating shell comprises a main body, a locking arm, a partition wall connected between the main body and the locking arm; a receiving space is arranged between the locking arm and the main body, the partition wall is protruded on the main body, a first stop surface is arranged on the rear end of the partition wall, the front section of the partition wall is connected with the main body, an insertion slot is arranged between the rear section of the partition wall and the main body, the insertion slot is located below the first stop surface, and the rear end of the insertion slot is communicated with the receiving space, a buckle slot is concavely arranged on the upper wall of the insertion slot, and a second stop surface is formed on the rear side of the buckle slot; and

[0009] A retaining member is installed in the receiving space and can be moved along the front-back direction relative to the locking arm between a pre-locking position and a final locking position; the retaining member comprises a base, a tongue plate extending forward from the base, a top stop block connected with the base, and a clamping block protruded on the front end of the tongue plate, and the tongue plate can be elastically flexed and received in the receiving space;

[0010] The first stop surface stops the clamping block to retain the retaining member at the pre-locking position, the top stop block at the pre-locking position is located behind the locking arm, and the locking arm can be flexed relative to the main body; after the BMS connector is inserted with the pair of plug connectors, the tongue plate is elastically flexed due to the downward pressing of the unlocking block, so that the clamping block is displaced downward to avoid the first stop surface, the retaining member can be moved forward to the final locking position, and the tongue plate is inserted into the insertion slot forwardly; when the retaining member is located at the final locking position, the unlocking block no longer presses the tongue plate, so that the tongue plate is elastically recovered to drive the clamping block to enter the buckle slot through the insertion slot, and the second stop surface stops the clamping block to prevent the retaining member from exiting the final locking position backwardly, and the top stop block at the final locking position abuts against the locking arm to prevent the locking arm from being flexed relative to the main body.

[0011] In one of the embodiments, the tongue plate is upwardly protruded with a protruding block, the protruding block is pressed by the unlocking block of the pair of plug connectors, the protruding block and the clamping block are connected on the same side surface of the tongue plate, and the clamping block is more forward than the protruding block in the front-back direction.

[0012] In one of the embodiments, the convex block is located at the center of the tongue in the left-right direction, the locking blocks are provided in two, and the two locking blocks are arranged symmetrically on both sides of the convex block. The height of the convex block is greater than or equal to the height of the locking block.

[0013] In one of the embodiments, a through hole is formed on the tongue at the rear side of the convex block, the through hole extends from the tongue to the base, and the through hole extends to between the two top blocks. In the left-right direction, the two inner side surfaces of the through hole are flush with the side surfaces of the two top blocks that are close to each other.

[0014] In one of the embodiments, the retaining member further comprises an arm portion connected to at least one side of the base in the left-right direction, the arm portion extends in the front-rear direction, a limiting block is convexly arranged on the arm portion, the insulating shell is provided with a guide groove matched with the arm portion, the guide groove guides the movement of the arm portion in the front-rear direction, and a third stop surface is arranged on one side of the guide groove in the left-right direction. The third stop surface is arranged at the rear side of the limiting block to prevent the retaining member from being pulled out of the insulating shell;

[0015] In the up-down direction, the height of the guide groove is equal to the height of the insertion slot.

[0016] In one of the embodiments, the number of arm portions is two, and the two arm portions are respectively connected to the left and right sides of the base. The tongue is located between and spaced apart from the two arm portions.

[0017] In the left-right direction, the width of the tongue is smaller than the width of the base. In the up-down direction, the thickness of the tongue is smaller than the thickness of the base. The lower side of the tongue is closer to the top than the lower side of the base. The lower side of the base is flush with the lower side of the arm portion.

[0018] In one of the embodiments, a strip-shaped hole extending in the front-rear direction is formed on each of the arm portions on both sides. Limiting blocks are convexly arranged on the sides away from the tongue.

[0019] The main body portion is provided with a retaining wall, the retaining wall, the main body portion, and the locking arm collectively form the accommodation space. The guide groove extends forward from the rear side of the retaining wall. The number of guide grooves is two, and each guide groove is arranged corresponding to the arm portion on the left or right side. Two limiting grooves are further concavely arranged on the side walls of the two guide grooves that are away from each other in the left-right direction. The rear end surfaces of the two limiting grooves form the third stop surface. The limiting blocks on both sides protrude into the two limiting grooves. The third stop surface is arranged at the rear of the limiting blocks.

[0020] In one of the embodiments, the partition wall comprises two side walls protruding upward from the main body, two top walls respectively connected to the two side walls away from the main body, the two side walls are arranged in the left-right direction, the two top walls extend in the left-right direction, a gap is arranged between the two top walls, the gap penetrates the locking arm upward, the gap corresponds to the setting position of the unlocking block, the unlocking block passes through the gap to press on the tongue, the main body, the two side walls and the two top walls are arranged outside the insertion slot, the buckle slot is arranged with two and is respectively recessed on the lower side of the two top walls.

[0021] In one of the embodiments, the locking arm comprises an extension section which can be deflected relative to the main body, and a connecting section connected to the front end of the extension section, the extension section is arranged between the main body and the top wall, the length of the extension section is greater than the length of the top wall in the front-back direction.

[0022] The main body is provided with two rows of terminal grooves in the front-back direction, and the terminal grooves are provided with wiring terminals.

[0023] In one of the embodiments, the partition wall further comprises a front wall connected to the two top walls, the front wall is located at the front end of the insertion slot, and the front wall is supported between the two top walls and the main body.

[0024] Compared with the prior art, the utility model has the following beneficial effects:

[0025] 1. By setting a spacing wall between the main body part and the locking arm of the insulating shell, the rear end of the spacing wall is provided with a first stop surface, the front end of the tongue of the retaining member is provided with a locking block, the first stop surface stops at the front side of the locking block to keep the retaining member in the pre-locking position, after the BMS connector and the counter connector are inserted into place, the tongue will be elastically deflected under the action of the unlocking block pressing, and then the locking block will be displaced downward to avoid the first stop surface to release the stop, the retaining member can move forward to the final locking position, by judging whether the retaining member can move to the final locking position, whether the BMS connector and the counter connector are inserted into place can be detected, and then the detection function of whether the BMS connector and the counter connector are inserted into place is added in the BMS connector. Moreover, since the first stop surface is arranged between the locking arm and the main body part instead of being arranged directly on the locking arm, when the first stop surface of the rear end of the spacing wall stops the locking block at the front end of the retaining member, the load borne by the spacing wall will not cause the locking arm to deform, and the deflection of the locking arm itself will not cause the first stop surface to deviate, ensuring the stability of the first stop surface of the rear end of the spacing wall stopping the retaining member, avoiding the stop failure of the retaining member and the spacing wall when the BMS connector and the counter connector are not inserted into place, and improving the detection accuracy of whether the BMS connector and the counter connector are inserted into place. Moreover, since the entire first stop surface at the rear end of the spacing wall can stop the locking block of the retaining member, the area range of the stopping effect can be increased, the accurate stop of the retaining member by the spacing wall can be ensured, the dimensional tolerance of the insulating shell and the retaining member in the injection molding process can be effectively absorbed, and then the yield of the BMS connector processing is improved. By protruding the spacing wall on the main body part, the spacing wall supports the accommodation space containing the retaining member between the main body part and the locking arm, and a groove for embedding the retaining member is not needed to be formed on the main body part, so that the installation of the retaining member will not occupy the installation position and arrangement position of the terminal, and then the external dimensions of the main body part will not change due to the addition of the retaining member, the structural size changes of the BMS connector and the counter connector due to the addition of the retaining member are reduced, and the production cost is reduced.

[0026] 2. By connecting the convex block and the locking block to the same side surface of the tongue, when the retaining member is in the pre-locking position, the first stop surface keeps stopping at the front side of the locking block to keep the retaining member in the pre-locking position; after the BMS connector and the counter connector are inserted into place, the unlocking block presses downward on the convex block to make the tongue flex downward to produce elastic deformation, the downward flexing of the tongue drives the locking block and the first stop surface to separate, and then the stop relationship between the locking block and the first stop surface is released, so that the retaining member can move from the pre-locking position to the final locking position. Since the locking block is more forward than the convex block in the front-rear direction, the force arm of the locking block acting on the tongue is longer than the force arm of the convex block acting on the tongue, so that a larger force is needed to release the stop, and the stability of the first stop surface at the rear end of the spacing wall stopping the retaining member is further improved.

[0027] 3. By setting the convex block at the center of the tongue piece in the left-right direction, the check blocks are symmetrically arranged on the left and right sides of the convex block, and the convex block is located at the center of the tongue piece in the left-right direction and the check blocks are symmetrically arranged relative to the convex block, which can ensure that the deflection deformation of the tongue piece in the left-right direction is symmetrical, and facilitates the alignment of the tongue piece with the insertion slot.

[0028] 4. By setting the through hole on the tongue piece, the width dimension of the tongue piece in the left-right direction is reduced, thereby reducing the hardness of the tongue piece and improving the reliability of the unlocking block in releasing the blocking of the retaining member by the spacing wall when the BMS connector and the plug connector are inserted into the position. Since the unlocking block exerts pressure on the convex block at the center of the tongue piece in the left-right direction, the tongue piece will protrude downward at the center in the left-right direction, and the through hole is arranged on the rear side of the convex block. Therefore, the internal stress generated by the deformation of the tongue piece in the left-right direction will be concentrated on the left and right side walls of the through hole, and the side surfaces of the two stop blocks close to each other are flush with the side surfaces of the through hole, which can increase the bearing strength of the left and right side walls of the through hole and avoid tearing, thereby prolonging the service life of the retaining member.

[0029] 5. In the up-down direction, the thickness dimension of the tongue piece is smaller than the thickness dimension of the base, which ensures that the tongue piece can produce elastic deformation in the up-down direction and thereby control the blocking relationship between the check block and the first blocking surface. In the left-right direction, the width dimension of the tongue piece is smaller than the width dimension of the base, and widening the width of the base can improve the bearing strength of the base, thereby improving the structural stability of the retaining member as a whole. At the same time, by arranging the arm portions on the left and right sides of the base, and in the up-down direction, the lower side of the tongue piece is higher than the lower side of the base, and the lower side of the base is flush with the lower side of the arm portion, so that the base and the arm portions on both sides can jointly support the tongue piece, forming a U-shaped support structure. Therefore, when the tongue piece is deformed by the downward pressure of the unlocking block, the tongue piece will not tilt to the left and right, improving the stability of the support of the tongue piece, and thereby improving the reliability of the blocking between the retaining member and the spacing wall and the releasing of the blocking of the retaining member by the unlocking block. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is an embodiment of the BMS connector of the utility model in the pre-lock position.

[0031] Figure 2 It is Figure 1 It is an exploded structural schematic view of the BMS connector and the plug connector.

[0032] Figure 3 It is Figure 1 It is a sectional view of the A-A position.

[0033] Figure 4 It is Figure 1Structure diagram of the middle BMS connector in the final locking position;

[0034] Figure 5 For Figure 4 Structure diagram of the middle B-B position;

[0035] Figure 6 For Figure 5 Structure diagram of the middle B-B position during movement from the pre-locking position to the final locking position;

[0036] Figure 7 For Figure 4 Structure diagram of the middle C-C position;

[0037] Figure 8 For Figure 7 Structure diagram of the middle C-C position during movement from the pre-locking position to the final locking position;

[0038] Figure 9 For Figure 4 Structure diagram of the middle D-D position;

[0039] Figure 10 For Figure 1 Structure diagram of the middle insulating housing;

[0040] Figure 11 For Figure 10 Structure diagram of the middle insulating housing from another perspective;

[0041] Figure 12 For Figure 1 Structure diagram of the middle retaining member;

[0042] Figure 13 For Figure 12 Structure diagram of the middle retaining member from another perspective;

[0043] Figure 14 For Figure 2 Structure diagram of the middle mating connector.

[0044] Explanation of the reference numerals of the drawings of the specific embodiments:

[0045] 100, BMS connector 1, insulating housing 11, main body 111, retaining wall 112, guide groove 113, side wall surface 114, limiting groove 115, third retaining surface 116, guide bar 117, terminal groove 118, terminal 12, locking arm 121, extension section 122, connecting section 13, partition wall 131, side vertical wall 132, top wall 133, front vertical wall 134, gap 135, first retaining surface 136, insertion slot 137, upper wall surface 138, locking groove 139, second retaining surface 15, accommodation space 2, retaining member 21, base 22, tongue 221, through hole 23, top stop block 24, locking block 25, convex pressing block 26, arm section 261, strip-shaped hole 262, limiting block 27, push-pull block 28, rib 9, mating connector 91, unlocking block 92, mating terminal

Specific Embodiment

[0046] In order to make the above object, characteristics and advantages of the present application more apparent, concrete embodiments of the present application will be described in detail below with reference to the drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different manners without departing from the scope of the present application. Those skilled in the related art can make similar modifications without departing from the scope of the present application, and therefore the present application is not limited to the following disclosed embodiments.

[0047] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0048] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0049] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0051] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only embodiment.

[0052] It should be noted that, according to Figures 1 to 14 As shown in the utility model embodiment, the X-axis direction, the Y-axis direction and the Z-axis direction intersect with each other; for the convenience of description, the front-back direction is defined as the X-axis direction, the X-axis positive direction is defined as the front direction, the left-right direction is defined as the Y-axis direction, and the up-down direction is defined as the Z-axis direction, and the Z-axis positive direction is defined as the upward direction. In the embodiment, the X-axis direction and the Y-axis direction are coplanar and perpendicular to each other, and the Z-axis direction is perpendicular to the common plane of the X-axis and the Y-axis. The front-back direction, the left-right direction and the up-down direction are mutually perpendicular. Further, the term "parallel" in the present application includes not only the case of absolute parallel, but also the case of approximate parallel as commonly recognized in engineering, for example, "parallel" means that the angle between straight lines, straight lines and planes, or planes is-1° to 1°; at the same time, "perpendicular" also includes not only the case of absolute perpendicular, but also the case of approximate perpendicular as commonly recognized in engineering, for example, "perpendicular" means that the angle between straight lines, straight lines and planes, or planes is 89° to 91°. The equal distance or equal angle includes not only the case of absolute equality, but also the case of approximate equality as commonly recognized in engineering, that is, there can be a certain error, for example, the tolerance range is-1% to 1%.

[0053] Please refer to Figures 1 to 14For the BMS connector 100 of the embodiment of the utility model, the BMS connector 100 is used for being inserted along the front-back direction with a matched counter connector 9 to transmit the current or signal between the circuit mainboard and the battery pack. The BMS connector 100 comprises an insulating shell 1, a plurality of wiring terminals 118 accommodated in the insulating shell 1 and a retaining piece 2 connected with the insulating shell 1, the insulating shell 1 is used for being inserted into the counter connector 9, and the retaining piece 2 is used for detecting whether the insertion of the insulating shell 1 of the BMS connector 100 and the counter connector 9 is in place. Further, the counter connector 9 is provided with an unlocking block 91, when the insertion of the insulating shell 1 and the counter connector 9 is in place, the unlocking block 91 passes through the insulating shell 1 and presses downwardly against the retaining piece 2, so that the retaining piece 2 is displaced to the unlocking state, and the insertion position between the BMS connector 100 and the counter connector 9 can be detected by detecting the state of the retaining piece 2.

[0054] Please refer to Figures 1 to 11 and Figure 14 The insulating shell 1 comprises a main body part 11, a locking arm 12 and a partition wall 13 connected between the main body part 11 and the locking arm 12. The main body part 11 is substantially in the rectangular strip structure, the main body part 11 is inserted into the counter connector 9 along the front-back direction, a plurality of terminal grooves 117 are provided through the main body part 11 along the front-back direction, the wiring terminals 118 are accommodated in the terminal grooves 117, and when the BMS connector 100 is inserted with the counter connector 9, the wiring terminals 118 in the BMS connector 100 are in contact with the counter terminals 92 in the counter connector 9 to ensure the transmission of the current or signal. Further, the plurality of terminal grooves 117 are arranged in the left-right direction to form a row of terminal grooves 117, and a plurality of rows of terminal grooves 117 are arranged in the up-down direction. It can be understood that the number of the terminal grooves 117 arranged in a row is not specifically limited, and the number of the rows of the terminal grooves 117 is not specifically limited, as long as the terminal grooves 117 can accommodate the wiring terminals 118 to fix the wiring terminals 118 in the main body part 11. In the embodiment, two rows of terminal grooves 117 are arranged on the main body part 11.

[0055] The locking arm 12 is located above the main body 11, and is used to be clamped with the mating connector 9 to fix the BMS connector 100 and the mating connector 9, and prevent the BMS connector 100 and the mating connector 9 from being separated. The locking arm 12 is an elastic strip structure, one end of the locking arm 12 is fixedly connected with the partition wall 13, and the other end of the locking arm 12 is movable in the up-down direction, so that the locking arm 12 can be deflected relative to the main body 11. A receiving space 15 is arranged between the locking arm 12 and the main body 11. By pressing the locking arm 12 downward, the locking arm 12 can be elastically deformed, thereby releasing the clamping state between the BMS connector 100 and the mating connector 9, and achieving the separation between the BMS connector 100 and the mating connector 9. In this embodiment, the locking arm 12 includes an extension segment 121 which can be deflected relative to the main body 11, and a connecting segment 122 connected to the front end of the extension segment 121. The extension segment 121 is arranged above the partition wall 13 and spaced apart from the partition wall 13. The connecting segment 122 is connected between the extension segment 121 and the partition wall 13, and supports the extension segment 121 on the partition wall 13 through the connecting segment 122. The extension segment 121 extends backward from the connecting segment 122 and gradually away from the main body 11. The extension segment 121 can be deflected upward and downward relative to the main body 11.

[0056] The spacing wall 13 is connected between the main body 11 and the locking arm 12, the spacing wall 13 protrudes from the upper surface of the main body 11, the front end of the locking arm 12 is connected to the upper surface of the spacing wall 13, the spacing wall 13 extends in the front-rear direction, the rear end of the spacing wall 13 is provided with a first stop surface 135 extending along the common plane of the up-down direction and the left-right direction, the first stop surface 135 is used for stopping the retaining member 2. The front section of the spacing wall 13 is connected with the main body 11 and the locking arm 12, a slot 136 is arranged between the rear section of the spacing wall 13 and the main body 11, the slot 136 extends in the front-rear direction, the slot 136 is located below the first stop surface 135, and the rear end of the slot 136 is connected with the accommodation space 15 to ensure that the retaining member 2 can be inserted into the spacing wall 13 through the slot 136. The upper wall surface 137 of the slot 136 is further concave upward to form a buckle slot 138 for the part of the retaining member 2 in the slot 136 to enter, the rear side of the buckle slot 138 forms a second stop surface 139 for stopping the part of the retaining member 2 inserted into the buckle slot 138 from exiting, so as to increase the resistance of the retaining member 2 from being pulled out of the slot 136. In the embodiment, the spacing wall 13 includes two side walls 131 protruding from the upper side of the main body 11, and two top walls 132 connected to the side walls 131 away from the main body 11; the two side walls 131 are arranged in the left-right direction, and both extend upward from the upper side of the main body 11 in the up-down direction, the two top walls 132 extend towards each other in the left-right direction, the upper surface of the top wall 132 is connected with the connecting section 122, the upper surface of the top wall 132 is arranged away from the extending section 121, the top wall 132 and the extending section 121 are connected through the connecting section 122 of the front end of the locking arm 12, and in the front-rear direction, the length of the extending section 121 is greater than the length of the top wall 132. A gap 134 is arranged between the two top walls 132, the gap 134 penetrates the locking arm 12 upward, i.e., the gap 134 penetrates the connecting section 122 and part of the extending section 121 upward, the gap 134 corresponds to the arrangement position of the unlocking block 91, the unlocking block 91 passes through the gap 134 to press against the tongue 22, the gap 134 is used for the unlocking block 91 to pass through the spacing wall 13 without interfering with each other during the plug-in process of the BMS connector 100 and the counter connector 9, the main body 11, the two side walls 131 and the two top walls 132 are arranged outside the slot 136, and the buckle slot 138 is arranged on the lower side of the two top walls 132. Further, the spacing wall 13 further includes a front wall 133 connected with the two top walls 132.The front vertical wall 133 is protruded on the upper side of the main body 11, and is located at the front end of the insertion slot 136, i.e. the front vertical wall 133 is located on the side of the insertion slot 136 away from the first stop surface 135. The front vertical wall 133 is supported between the two top walls 132 and the main body 11. The front vertical wall 133 is used to improve the strength of the overall spacing wall 13, so as to ensure that the spacing wall 13 will not be deformed due to the load of the locking arm 12 during the process of being pressed to be deformed, thereby ensuring the stability of the first stop surface 135 to stop the retaining member 2.

[0057] Please refer to Figures 1 to 9 , and Figures 12 to 14 The retaining member 2 is installed in the accommodation space 15 and can move along the front and back directions relative to the locking arm 12 between a pre-locking position and a final locking position. When the retaining member 2 is in the pre-locking position, it does not stop the locking arm 12, and the locking arm 12 can be deformed by flexing to release the clamping between the BMS connector 100 and the mating connector 9, so that the BMS connector 100 can be separated from the mating connector 9. When the retaining member 2 is in the final locking position, it stops the locking arm 12, and the locking arm 12 cannot be deformed by flexing, thereby maintaining the clamping relationship between the BMS connector 100 and the mating connector 9, and achieving the locking of the retaining member 2 to the locking arm 12. Since the retaining member 2 can only be moved from the pre-locking position to the final locking position when the BMS connector 100 and the mating connector 9 are inserted in place, it can be detected whether the BMS connector 100 and the mating connector 9 are inserted in place by judging whether the retaining member 2 can be moved from the pre-locking position to the final locking position. Since the spacing wall 13 is protruded on the main body 11, the accommodation space 15 for accommodating the retaining member 2 is provided between the main body 11 and the locking arm 12. Therefore, the structure of the spacing wall 13 makes it unnecessary to open a groove on the main body 11 for the retaining member 2 to be installed and embedded. Embedding the retaining member 2 on the main body 11 will occupy the installation and arrangement positions of the terminal 118, thereby making the size of the main body 11 larger. However, the embodiment uses the structure of the spacing wall 13 to support the accommodation space 15 for accommodating the retaining member 2 between the main body 11 and the locking arm 12, so that the installation of the retaining member 2 will not occupy the installation positions and arrangement positions of the terminal 118, thereby making the size of the main body 11 not change due to the addition of the retaining member 2, reducing the change of the structural size of the BMS connector 100 and the mating connector 9 due to the addition of the retaining member 2, and reducing the production cost.

[0058] The retaining member 2 comprises a base 21, a tongue 22 extending forward from the base 21, a top stop 23 connecting the base 21, and a locking block 24 protruding from the front end of the tongue 22. The base 21 extends along the common plane of the front-rear direction and the left-right direction in a straight plate shape, the tongue 22 is arranged in front of the base 21, the tongue 22 is in an elastic sheet structure and extends along the common plane of the front-rear direction and the left-right direction, and the tongue 22 can be elastically bent and accommodated in the accommodation space 15. In the left-right direction, the width dimension of the tongue 22 is smaller than that of the base 21; in the up-down direction, the thickness dimension of the tongue 22 is smaller than that of the base 21, and the lower side of the tongue 22 is higher than that of the base 21, so that the tongue 22 can be pressed downward by the unlocking block 91 to produce elastic bending deformation in the up-down direction, at the same time, the width dimension of the base 21 in the left-right direction is widened, the carrying strength of the base 21 can be improved, the strength of the base 21 is greater, which can effectively avoid the tearing of the base 21 due to the stress concentration when the tongue 22 is bent and deformed, thereby effectively prolonging the service life of the retaining member 2.

[0059] The top stop 23 is protruded above the base 21, and corresponds to the setting position of the rear end of the locking arm 12. When the holder 2 is in the pre-lock position, the top stop 23 is located behind the locking arm 12, and the locking arm 12 can be elastically deformed in the up-down direction. When the holder 2 is in the final lock position, the top stop 23 supports the locking arm 12 from below to prevent the elastic deformation of the locking arm 12. The stop block 24 is protruded above the tongue 22, and corresponds to the setting position of the first stop surface 135. The stop block 24 is used to abut against the first stop surface 135 to ensure that the spacer wall 13 stops the holder 2 at the pre-lock position. Specifically, the first stop surface 135 stops the stop block 24 to keep the holder 2 at the pre-lock position, and the top stop 23 at the pre-lock position is located behind the locking arm 12, which can be elastically deformed relative to the main body 11. When the BMS connector 100 is inserted into the mating connector 9, i.e., when the BMS connector 100 is inserted into the mating connector 9 in place, the tongue 22 is elastically deformed by the downward pressure of the unlocking block 91, so that the stop block 24 is displaced downward to avoid the first stop surface 135. The holder 2 can move forward to the final lock position, and the tongue 22 is inserted into the slot 136. When the holder 2 is in the final lock position, the unlocking block 91 no longer presses the tongue 22, so that the tongue 22 elastically recovers to drive the stop block 24 to enter the buckle slot 138 through the slot 136. The second stop surface 139 stops the stop block 24 to prevent the holder 2 from exiting the final lock position. The top stop 23 at the final lock position abuts against the locking arm 12 to prevent the locking arm 12 from being deformed relative to the main body 11. In this embodiment, the rear side of the stop block 24 is gradually inclined from front to back to approach the tongue 22, so that the rear side of the stop block 24 is in contact with the second stop surface 139 when the holder 2 is in the final lock position. Therefore, when the pulling force applied to the holder 2 reaches a certain value, the holder 2 can be pulled out of the slot 136, i.e., the holder 2 can be moved from the final lock position to the pre-lock position by direct pulling, but a certain pulling force is required, and the holder 2 cannot be pulled out of the slot 136 at will. Further, the distance between the upper side of the main body 11 and the lower side of the top wall 132 is greater than or equal to the distance between the upper side of the main body 11 and the upper side of the tongue 22, and the distance between the upper side of the main body 11 and the lower side of the top wall 132 is less than the maximum distance between the upper side of the main body 11 and the upper surface of the stop block 24. This ensures that the stop block 24 abuts against the first stop surface 135 when the holder 2 is in the pre-lock position, and the stop block 24 abuts against the second stop surface 139 when the holder 2 is in the final lock position.

[0060] The retaining member 2 further comprises a protruding block 25 matched with the unlocking block 91. The protruding block 25 is protruded upward from the tongue 22, and is arranged at the same side of the tongue 22 as the locking block 24. In the front-rear direction, the locking block 24 is more forward than the protruding block 25. The protruding block 25 is arranged at a position corresponding to the arrangement position of the unlocking block 91. The unlocking block 91 makes the tongue 22 flex downward by pressing the protruding block 25, and then makes the locking block 24 disengage from the first stop surface 135. By arranging the locking block 24 more forward than the protruding block 25, the force arm of the locking block 24 on the tongue 22 is longer than the force arm of the protruding block 25 on the tongue 22, so that a larger force is needed to release the stop. Thus, it is ensured that the locking block 24 can only disengage from the first stop surface 135 when the BMS connector 100 and the mating connector 9 are fully inserted, thereby improving the stability of the first stop surface 135 of the rear end of the partition wall 13 to stop the retaining member 2, and improving the detection accuracy of whether the BMS connector 100 and the mating connector 9 are fully inserted. In the embodiment, the protruding block 25 is located at the center of the tongue 22 in the left-right direction. The height of the protruding block 25 is greater than or equal to the height of the locking block 24. Two locking blocks 24 are arranged symmetrically on the left and right sides of the protruding block 25, so as to ensure that the flexion deformation degree of the tongue 22 in the left-right direction is symmetrical, thereby ensuring that the force on the two locking blocks 24 is uniform, and avoiding the situation that the two locking blocks 24 are worn differently due to long-term unilateral force, resulting in unilateral stop failure. The number of the top blocks 23 is two. In the front-rear direction, the two top blocks 23 are arranged on the left and right sides of the protruding block 25 and between the protruding block 25 and the locking block 24. The top blocks 23 improve the hardness of the tongue 22 between the protruding block 25 and the locking block 24 in the left-right direction, thereby reducing the deformation amount of the tongue 22 in the left-right direction, and improving the reliability of the unlocking block 91 to release the stop of the retaining member 2 by the partition wall 13 when the BMS connector 100 and the mating connector 9 are fully inserted.Further, the tongue 22 is provided with a through hole 221 at the rear side of the convex block 25, the through hole 221 extends from the tongue 22 to the base 21 rearwardly, the through hole 221 extends to between the two top stop blocks 23, in the left-right direction, the two inner sides of the through hole 221 are flush with the mutually close sides of the two top stop blocks 23, by providing the through hole 221, the width of the tongue 22 can be reduced, thereby reducing the hardness of the tongue 22, improving the reliability that the unlocking block 91 of the BMS connector 100 and the counter-plug connector 9 are inserted into place to release the stop of the spacer wall 13 to the retainer 2, and because when the unlocking block 91 downwardly presses the convex block 25, the clamping block 24 is subjected to the upward frictional force of the first stop surface 135, so that the tongue 22 will be deflected in the left-right direction, and the internal stress of the tongue 22 in the left-right direction will be concentrated at the left and right sides of the through hole 221, by flush of the mutually close sides of the two top stop blocks 23 with the two sides of the through hole 221, the bearing strength of the left and right side walls of the through hole 221 can be increased, avoiding tearing, thereby prolonging the service life of the retainer 2.

[0061] The retaining member 2 further comprises an arm portion 26 connected to at least one side of the base portion 21 in the left-right direction, the arm portion 26 extending in the front-rear direction, and a limiting block 262 protruding from the arm portion 26; the insulating housing 1 is provided with a guide slot 112 cooperating with the arm portion 26, the guide slot 112 guiding the arm portion 26 to move in the front-rear direction, and a third stop surface 115 provided on one side of the guide slot 112 in the left-right direction, the third stop surface 115 stopping at the rear side of the limiting block 262 to prevent the retaining member 2 from being pulled out of the insulating housing 1. In the up-down direction, the height dimension of the guide slot 112 is equal to the height dimension of the insertion slot 136, so that the guiding force acting on the arm portion 26 and the stopping force acting on the tongue 22 are located in the same height plane, thereby avoiding the generation of additional internal stress in the retaining member 2 due to the height difference between the guiding force and the stopping force, reducing the stress load borne by the retaining member 2, and prolonging the service life of the retaining member 2. Specifically, the number of arm portions 26 is two, and the two arm portions 26 are respectively connected to the left and right sides of the base portion 21, and the two arm portions 26 are arranged in parallel with the tongue 22, the tongue 22 being arranged between and spaced apart from the two arm portions 26 in the left-right direction, and the lower side of the tongue 22 being higher than the lower side of the base portion 21 in the up-down direction, the lower side of the base portion 21 being flush with the lower side of the arm portion 26, so that after the retaining member 2 is inserted into the accommodation space 15, the lower side of the base portion 21 and the lower side of the two side arm portions 26 are in contact with the upper side of the main body portion 11, forming a U-shaped structure to support the tongue 22, avoiding the left and right tilting of the tongue 22, and improving the reliability of the retaining member 2 and the unlocking block 91 in releasing the retaining of the retaining member 2.In the embodiment, a strip-shaped hole 261 extending in the front-rear direction is formed on each of the two arm portions 26, so that the arm portions 26 can be elastically deformed in the left-right direction. Limiting blocks 262 are protruded on the sides of the two arm portions 26 away from the tongue 22. The main body portion 11 is provided with a retaining wall 111, which, together with the main body portion 11 and the locking arm 12, forms a receiving space 15. The guide grooves 112 extend forward from the rear side of the retaining wall 111. The two guide grooves 112 are respectively arranged corresponding to the left and right arm portions 26. Further, a limiting groove 114 is formed in the left-right direction on the side wall 113 of the two guide grooves 112 away from each other. The two limiting grooves 114 extend away from each other in the left-right direction from the two side walls 113. The rear end faces of the two limiting grooves 114 form a third stop face 115. The limiting blocks 262 of the two arm portions 26 protrude into the limiting grooves 114, and the third stop face 115 is located behind the limiting blocks 262 to prevent the retaining member 2 from being pulled out of the receiving space 15. In this way, the retaining member 2 is stably retained at the pre-locked position in the front-rear direction, with the clamping block 24 at the front end of the retaining member 2 being stopped by the first stop face 135, and the rear side of the limiting blocks 262 on the two sides of the retaining member 2 being stopped by the third stop face 115. The strip-shaped hole 261 formed on the arm portion 26 allows the arm portion 26 to have a certain elastic deformation in the left-right direction, so as to facilitate the insertion of the retaining member 2 into the receiving space 15 from the rear to the front.

[0062] Please refer to Figures 1 to 11The guide strips 116 are both long strips extending in the front-rear direction, the front ends of the two guide strips 116 are connected to the left and right sides of the partition wall 13 respectively, the guide slot 112 is located between the guide strips 116 and the main body 11 in the up-down direction to allow the arm 26 to slide in, the guide strips 116 on the two sides are in contact with the upper side of the arms 26 on the two sides respectively to limit the holding piece 2 in the up-down direction. In the embodiment, the holding piece 2 further comprises a push-pull block 27 connected to the rear side of the top stop 23, the push-pull block 27 extends upward from the base 21, the top stop 23 is arranged at the joint position of the push-pull block 27 and the base 21, the push-pull block 27 is used for facilitating manual pushing and pulling of the holding piece 2 to move, the push-pull block 27 is a plate extending along the common surface of the up-down direction and the left-right direction, the base 21 is a plate extending along the common surface of the front-rear direction and the left-right direction, the top stop 23 is a plate extending along the common surface of the up-down direction and the front-rear direction, the push-pull block 27, the base 21 and the top stop 23 are perpendicular to each other in pairs, thereby improving the overall structural strength of the holding piece 2. The holding piece 2 further comprises two rib strips 28 connected to the left and right sides of the push-pull block 27; the two rib strips 28 extend upward from the arms 26 on the two sides respectively, since the rib strips 28 are connected to the push-pull block 27 and the arms 26 simultaneously, the rib strips 28 can effectively improve the structural strength of the arms 26 on the two sides, thereby prolonging the service life of the holding piece 2; the two rib strips 28 are arranged between the two guide strips 116, and the side surfaces of the two rib strips 28, which are away from each other, are in contact with the side surfaces of the two guide strips 116, which are close to each other, the guide strips 116 limit the holding piece 2 in the left-right direction by abutting against the side of the two guide strips 116, which are close to each other, since the guide strips 116 are in contact with the upper side of the arms 26 to limit, the guide strips 116 can limit the holding piece 2 in the left-right direction and the up-down direction simultaneously, the guide strips 116 can realize bidirectional limitation of the holding piece 2 by one component, the structure is simpler, thereby reducing the production cost.

[0063] In conclusion, the BMS connector 100 has the following beneficial effects compared with the prior art.

[0064] 1. By setting a spacing wall 13 between the main body part 11 and the locking arm 12 of the insulating shell 1, the rear end of the spacing wall 13 is provided with a first stop surface 135, the front end of the tongue 22 of the retaining member 2 is provided with a blocking block 24, the first stop surface 135 stops at the front side of the blocking block 24 to keep the retaining member 2 in the pre-locking position, after the BMS connector 100 and the mating connector 9 are inserted in place, the tongue 22 will be elastically deflected under the action of the unlocking block 91, and then the blocking block 24 will be displaced downward to avoid the first stop surface 135 to release the stop, the retaining member 2 can be moved to the final locking position, by judging whether the retaining member 2 can be moved to the final locking position, it can be detected whether the BMS connector 100 and the mating connector 9 are inserted in place, and then the detection function of whether the BMS connector 100 and the mating connector 9 are inserted in place is added. Moreover, since the first stop surface 135 is arranged between the locking arm 12 and the main body part 11 instead of being directly arranged on the locking arm 12, when the first stop surface 135 at the rear end of the spacing wall 13 stops the blocking block 24 at the front end of the retaining member 2, the load borne by the spacing wall 13 will not cause the locking arm 12 to deform, and the deflection of the locking arm 12 itself will not cause the first stop surface 135 to deviate, ensuring the stability of the first stop surface 135 at the rear end of the spacing wall 13 stopping the retaining member 2, avoiding the situation that the retaining member 2 and the spacing wall 13 stop failure when the BMS connector 100 and the mating connector 9 are not inserted in place, and improving the detection accuracy of whether the BMS connector 100 and the mating connector 9 are inserted in place. Moreover, since the entire first stop surface 135 at the rear end of the spacing wall 13 can stop the blocking block 24 of the retaining member 2, the area range of the stopping effect can be increased, the accurate stopping of the spacing wall 13 to the retaining member 2 can be ensured, the dimensional tolerance of the insulating shell 1 and the retaining member 2 during injection molding can be effectively absorbed, and then the yield rate of the BMS connector 100 is improved. By protruding the spacing wall 13 on the main body part 11, the spacing wall 13 props up the accommodation space 15 containing the retaining member 2 between the main body part 11 and the locking arm 12, so a groove for embedding the retaining member 2 is not needed to be opened on the main body part 11, so the installation of the retaining member 2 will not occupy the installation position and arrangement position of the wiring terminal 118, and then the external dimensions of the main body part 11 will not change due to the addition of the retaining member 2, reducing the change of the structural dimensions of the BMS connector 100 and the mating connector 9 due to the addition of the retaining member 2, and reducing the production cost.

[0065] 2. By connecting the convex block 25 and the locking block 24 to the same side of the tongue piece 22, when the retaining member 2 is in the pre-locking position, the first stop surface 135 is kept from stopping at the front side of the locking block 24 to keep the retaining member 2 in the pre-locking position; after the BMS connector 100 is inserted into the mating connector 9, the unlocking block 91 presses the convex block 25 downward to make the tongue piece 22 flex downward to produce elastic deformation, the tongue piece 22 flexes downward to drive the locking block 24 to separate from the first stop surface 135, and then the stop relationship between the locking block 24 and the first stop surface 135 is released, so that the retaining member 2 can be moved from the pre-locking position to the final locking position. Since the locking block 24 is more forward than the convex block 25 in the front-back direction, the force arm of the locking block 24 acting on the tongue piece 22 is longer than the force arm of the convex block 25 acting on the tongue piece 22, so that a greater force is required to release the stop, further improving the stability of the first stop surface 135 at the rear end of the partition wall 13 to stop the retaining member 2.

[0066] 3. By setting the convex block 25 at the center of the tongue piece 22 in the left-right direction, the convex block 25 is symmetrically arranged with the locking block 24 on both sides, since the convex block 25 bears the downward pressure of the unlocking block 91 when releasing the stop, and the locking blocks 24 on both sides bear the upward friction force of the first stop surface 135, so that the convex block 25 is located at the center of the tongue piece 22 in the left-right direction and the locking blocks 24 are symmetrically arranged relative to the convex block 25, which can ensure that the flexural deformation of the tongue piece 22 in the left-right direction is symmetrical, facilitating the alignment of the tongue piece 22 for insertion into the insertion slot 136.

[0067] 4. By opening a through hole 221 on the tongue piece 22, which is equivalent to reducing the width dimension of the tongue piece 22 in the left-right direction, thereby reducing the hardness of the tongue piece 22 and improving the reliability of the unlocking block 91 to release the stop of the retaining member 2 by the partition wall 13 when the BMS connector 100 is inserted into the mating connector 9. Since the unlocking block 91 exerts pressure on the convex block 25 at the center of the tongue piece 22 in the left-right direction, the center of the tongue piece 22 will protrude downward in the left-right direction, and the through hole 221 is arranged at the rear side of the convex block 25, so that the internal stress generated by the deformation of the tongue piece 22 in the left-right direction will be concentrated on the left and right side walls of the through hole 221, and the side surfaces of the two stop blocks 23 close to each other are flush with the side surfaces of the through hole 221, which can increase the bearing strength of the left and right side walls of the through hole 221, avoid tearing, and thereby prolong the service life of the retaining member 2.

[0068] 5. By the thickness dimension of the tongue 22 being less than the thickness dimension of the base 21 in the up-down direction, it is ensured that the tongue 22 can be elastically deformed in the up-down direction to control the blocking relationship between the blocking block 24 and the first blocking surface 135. In the left-right direction, the width dimension of the tongue 22 is less than the width dimension of the base 21, and widening the width of the base 21 can improve the load-bearing strength of the base 21, thereby improving the structural stability of the whole retaining member 2; at the same time, by arranging the arm portions 26 on the left and right sides of the base 21 respectively, and in the up-down direction, the lower side of the tongue 22 is higher than the lower side of the base 21, and the lower side of the base 21 is flush with the lower side of the arm portions 26, so that the base 21 and the arm portions 26 on both sides can jointly support the tongue 22, forming a U-shaped support structure, so that when the tongue 22 is deformed by the downward pressure of the unlocking block 91, the tongue 22 will not tilt to the left and right, improving the stability of the support of the tongue 22, and thereby improving the reliability of the blocking between the retaining member 2 and the spacing wall 13 and the unlocking of the retaining member 2 by the unlocking block 91.

[0069] 6. When viewed in the front-rear direction, the two top blocking blocks 23 are arranged on the left and right sides of the bulging block 25 and between the bulging block 25 and the blocking block 24, which is equivalent to improving the hardness of the tongue 22 in the left-right direction between the bulging block 25 and the blocking block 24, thereby reducing the deformation amount of the tongue 22 in the left-right direction, and improving the reliability of the unlocking of the retaining member 2 by the unlocking block 91 when the BMS connector 100 and the plug-in connector 9 are inserted into place.

[0070] 7. By arranging the guide strips 116 on the left and right sides of the spacing wall 13, arranging the push-pull block 27 on the rear side of the top blocking block 23 and arranging the rib strips 28 on the left and right sides of the push-pull block 27, the mutually facing sides of the two rib strips 28 respectively contact the mutually close sides of the two guide strips 116, and the two guide strips 116 respectively contact the upper sides of the arm portions 26 on both sides, so that the guide strips 116 guide the retaining member 2 in the up-down direction and the left-right direction at the same time, and the overall structure is simpler, reducing production costs.

[0071] The technical features of the above-described embodiments can be combined in any manner. In order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.

[0072] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A BMS connector for being inserted with a pair of plug connectors in a front-rear direction, the pair of plug connectors being provided with an unlocking block, characterized in that, The BMS connector comprises: An insulating housing comprising a main body portion, a locking arm, a partition wall connected between the main body portion and the locking arm; a receiving space is provided between the locking arm and the main body portion, the partition wall is protruded from the main body portion, a first stop surface is provided at the rear end of the partition wall, the front section of the partition wall is connected with the main body portion, a slot is provided between the rear section of the partition wall and the main body portion, the slot is below the first stop surface and communicates with the receiving space, an upwardly concave clamping groove is provided on the upper wall of the slot, and a second stop surface is formed at the rear side of the clamping groove; and A retaining member installed in the receiving space and movable in the front-rear direction relative to the locking arm between a pre-locking position and a final locking position; the retaining member comprises a base portion, a tongue extending forwardly from the base portion, a top stop connected with the base portion, and a clamping block protruded from the front end of the tongue, the tongue is elastically flexible and received in the receiving space; The first stop surface stops the clamping block to retain the retaining member at the pre-locking position, the top stop at the pre-locking position is located rearward of the locking arm, and the locking arm is flexible relative to the main body portion; after the BMS connector is inserted into the mating connector, the tongue is elastically flexible due to the downward pressing of the unlocking block, so that the clamping block is displaced downward to avoid the first stop surface, the retaining member is movable forwardly to the final locking position, the tongue is inserted into the slot forwardly, when the retaining member is at the final locking position, the unlocking block no longer presses the tongue, so that the tongue is elastically restored to drive the clamping block to enter the clamping groove through the slot, and the second stop surface stops the clamping block to prevent the retaining member from exiting the final locking position, and the top stop at the final locking position abuts against the locking arm to prevent the locking arm from being flexible relative to the main body portion.

2. The BMS connector of claim 1, wherein, The tongue is upwardly protruded with a protruding block for the unlocking block of the mating connector to press, the protruding block and the clamping block are connected on the same side of the tongue, and the clamping block is more forward than the protruding block in the front-rear direction.

3. The BMS connector of claim 2, wherein, The protruding block is located at the center of the tongue in the left-right direction, the clamping block is provided with two clamping blocks, and the two clamping blocks are symmetrically arranged on both sides of the protruding block, and the height of the protruding block is greater than or equal to the height of the clamping block.

4. The BMS connector of claim 3, wherein, A through hole is provided on the tongue at the rear side of the protruding block, the through hole extends rearwardly from the tongue to the base portion, the through hole extends between the two top stops, and the two inner sides of the through hole are flush with the sides of the two top stops close to each other in the left-right direction.

5. The BMS connector of claim 1, wherein, The retaining member further comprises an arm part connected to at least one side of the base part in the left-right direction, the arm part extends in the front-rear direction, a limiting block is protruded on the arm part, the insulating shell is provided with a guide groove matched with the arm part, the guide groove guides the arm part to move in the front-rear direction, the insulating shell is provided with a third stop surface on one side of the guide groove in the left-right direction, the third stop surface stops at the rear side of the limiting block to prevent the retaining member from being taken out of the insulating shell; In the up-down direction, the height dimension of the guide groove is equal to the height dimension of the insertion slot.

6. The BMS connector of claim 5, wherein, The number of the arm parts is two, the two arm parts are respectively connected to the left and right sides of the base part, and the tongue is arranged between and spaced from the two arm parts; In the left-right direction, the width dimension of the tongue is smaller than the width dimension of the base part; in the up-down direction, the thickness dimension of the tongue is smaller than the thickness dimension of the base part, the lower side of the tongue is higher than the lower side of the base part, and the lower side of the base part is flush with the lower side of the arm part.

7. The BMS connector of claim 6, wherein, A strip-shaped hole extending in the front-rear direction is formed on each of the arm parts on the two sides, and a limiting block is protruded on the side of each of the arm parts away from the tongue; The main body part is provided with a retaining wall, the retaining wall, the main body part and the locking arm jointly form the accommodation space, the guide groove extends forward from the rear side of the retaining wall, the number of the guide grooves is two and the guide grooves are respectively arranged corresponding to the arm parts on the left and right sides, further recessed limiting grooves are formed on the side walls of the two guide grooves away from each other in the left-right direction, the rear end surfaces of the two limiting grooves form the third stop surface, the limiting blocks on the two sides protrude into the two limiting grooves respectively, and the third stop surface stops behind the limiting blocks.

8. The BMS connector of claim 1, wherein, The spacing wall comprises two side vertical walls protruded upward from the main body part, and two top walls connected to the sides of the two side vertical walls away from the main body part; the two side vertical walls are arranged apart in the left-right direction, the two top walls extend toward each other in the left-right direction, a gap is formed between the two top walls, the gap penetrates the locking arm upward, the gap corresponds to the arrangement position of the unlocking block, the unlocking block penetrates the gap to press against the tongue, the main body part, the two side vertical walls and the two top walls surround the outside of the insertion slot, and the two locking grooves are recessed on the lower side surfaces of the two top walls.

9. The BMS connector of claim 8, wherein, The locking arm comprises an extension segment capable of being deflected relative to the main body part, and a connecting segment connected to the front end of the extension segment; the extension segment is arranged apart from the top wall, and the connecting segment is connected between the extension segment and the top wall; in the front-rear direction, the length dimension of the extension segment is greater than the length dimension of the top wall. The main body part is provided with two rows of terminal grooves penetrating in the front-rear direction, and the terminal grooves are provided with wiring terminals.

10. The BMS connector of claim 8, wherein, The spacing wall further comprises a front vertical wall connected to the two top walls; the front vertical wall is located at the front end of the insertion slot, and the front vertical wall is supported between the two top walls and the main body part.

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