阅读说明：本技术 一种快换电池及电池壳体 (Quick-change battery and battery shell ) 是由 熊渊 齐鹏程 孔德勇 于 2019-01-31 设计创作，主要内容包括：本发明涉及二次电池领域,尤其涉及一种快换电池及电池壳体。其中,快换电池的电池壳体的其中一壳壁上配置有用于与充电装置或车体插接的插头,所述插头包括绝缘壳体以及封装在绝缘壳体中的电接触件,电接触件与电芯导电连接,所述绝缘壳体与插头所在壳壁为一体结构。本发明的快换电池通过将插头的绝缘壳体与电池壳体的壳壁设置为一体结构,插头与电池壳体之间的连接较为可靠,其次,电接触件是封装在绝缘壳体中的,插头本身密封效果较好,插头的绝缘壳体与电池壳体的一体结构也避免了两者可拆连接所具有的连接缝隙,更不会出现密封失效的问题,因此本发明的快换电池相比现有技术的电池凸显出来较为优异的密封性。(The invention relates to the field of secondary batteries, in particular to a quick-change battery and a battery shell. The quick-change battery comprises a battery shell, a charging device and a vehicle body, wherein a plug used for being plugged with the charging device or the vehicle body is arranged on one shell wall of the battery shell of the quick-change battery, the plug comprises an insulating shell and an electric contact part packaged in the insulating shell, the electric contact part is in conductive connection with a battery cell, and the insulating shell and the shell wall where the plug is located are of an integrated structure. According to the quick-change battery, the insulating shell of the plug and the shell wall of the battery shell are arranged into an integrated structure, the plug and the battery shell are connected reliably, the electric contact pieces are packaged in the insulating shell, the sealing effect of the plug is good, the integrated structure of the insulating shell of the plug and the battery shell avoids a connecting gap formed by the detachable connection of the insulating shell of the plug and the battery shell, and the problem of sealing failure is avoided.)

1. A quick-change battery comprises a battery shell, wherein the battery shell comprises a cylindrical shell, and a top wall and a bottom wall which are arranged at two ends of the cylindrical shell, a battery cell is arranged in the battery shell, and a plug which is used for being plugged with a charging device or a vehicle body is arranged on one shell wall of the battery shell.

2. The quick-change battery according to claim 1, wherein the plug is arranged on the bottom wall, and the bottom wall is detachably connected with the cylindrical shell.

3. The quick-change battery according to claim 1, wherein the inner side of the bottom wall is provided with a reinforcing rib.

4. The quick-change battery according to claim 1, wherein the plug side end face of the plug is not higher than the outer side face of the housing wall.

5. The quick-change battery according to claim 1, 2, 3 or 4, wherein the shell wall of the plug is in a non-circular central symmetrical pattern, the plug is arranged at the symmetrical center of the shell wall, the electric contact member encapsulated in the insulating shell of the plug comprises a positive electrode, a negative electrode and a signal terminal, one of the positive electrode and the negative electrode is arranged at the center of the plug and is a central electrode, the other one of the positive electrode and the negative electrode is a side electrode and surrounds the signal terminal at the side of the central electrode, the side electrode and the signal terminal jointly form a side terminal group which is used for being matched and plugged with one of more than two side terminal groups of the adaptive socket, the insulating shell of the plug is further provided with accommodating vacancies for accommodating at least part of contacts of other side terminal groups of the adaptive socket around the central electrode, and the accommodating vacancies and the terminal groups of the plug are uniformly distributed around the central electrode so that the plug and the socket can realize plugging at least two circumferential And (6) connecting.

6. The quick-change battery as claimed in claim 5, wherein the receiving space has one shape and is symmetrical with the side terminal set about the center of the central electrode, and the wall of the casing where the plug is located is rectangular.

7. The quick-change battery according to claim 5, wherein the insulating housing is provided with a plug ring groove for inserting the cylindrical plug section of the adapter socket, and a cylindrical plug section is formed in the plug ring groove, and the outer ends of the plug contacts are sunk in the cylindrical plug section.

8. The quick-change battery as claimed in claim 7, wherein the end face of the cylindrical plug section is provided with a groove which is symmetrical with respect to the center of the center electrode.

9. The quick-change battery as claimed in claim 7, wherein the cylindrical plug section is further provided with guide holes uniformly distributed around the central electrode for guiding and matching with the guide posts of the adapter socket.

10. A battery housing, characterized in that the battery housing is a battery housing of a quick-change battery according to any one of claims 1-9.

Technical Field

The invention relates to the field of secondary batteries, in particular to a quick-change battery and a battery shell.

Background

With the rapid development of new energy application, the proportion of electric bicycles or electric automobiles used for riding instead of walk in cities cannot be ignored. The electric bicycle can be divided into a plug-in type and a battery replacement type according to different charging modes, when the plug-in type electric bicycle is charged, a vehicle owner is required to place the whole bicycle in a special charging area for charging, and the next riding can be carried out after the charging is finished; and trade electric bicycle rides the whole car that the electric quantity is not enough to appointed trade the electric region, changes the power battery that the electric quantity is not enough for the battery that finishes that charges in the cabinet that charges, therefore the car owner can directly ride next time after changing the battery to save the time of waiting to charge, and the battery that trades down charges and monitors by professional equipment in the cabinet that charges, reduced charging process's safety risk, improved battery life.

The battery of the existing electric bicycle in the market is researched and found that a plug which is arranged on the battery and is used for being directly connected with the electric bicycle and a charging cabinet in an inserting mode is generally arranged on a battery shell provided with an installation hole position through a screw or a bolt, however, the electric bicycle is inevitably impacted and vibrated in the driving process, after the electric bicycle is used for a period of time, the connection of the plug is often loosened, the looseness is aggravated after the electric bicycle is frequently plugged, and the problem that the electric contact is poor when the battery supplies power to the electric bicycle and the battery is charged is easily caused; secondly, the plug often leads to its and battery case's the junction seal inefficacy after the pine, gets into dust even rainwater easily, reduces the life of battery.

Disclosure of Invention

The invention aims to provide a quick-change battery, which is used for solving the problems that the existing quick-change battery plug is unreliable in connection and easily causes sealing failure. Meanwhile, the invention also provides a battery shell suitable for the quick-change battery, which is used for solving the problem that the existing quick-change battery plug is unreliable in connection and easily causes sealing failure.

In order to achieve the purpose, the technical scheme of the quick-change battery is as follows:

a quick-change battery comprises a battery shell, wherein the battery shell comprises a cylindrical shell, and a top wall and a bottom wall which are arranged at two ends of the cylindrical shell, a battery cell is installed in the battery shell, a plug which is used for being plugged with a charging device or a vehicle body is configured on one shell wall of the battery shell, the plug comprises an insulating shell and an electric contact which is packaged in the insulating shell, the inner end of the electric contact is in conductive connection with the battery cell, and the insulating shell and the shell wall where the plug is located are of an integrated structure.

According to the quick-change battery, the insulating shell of the plug and the shell wall of the battery shell are arranged into an integrated structure, the plug and the battery shell are connected reliably, the electric contact pieces are packaged in the insulating shell, the sealing effect of the plug is good, the integrated structure of the insulating shell of the plug and the battery shell avoids a connecting gap formed by the detachable connection of the insulating shell of the plug and the battery shell, and the problem of sealing failure is avoided.

Further, the plug sets up on the diapire, diapire and tube-shape casing releasable connection, directly insert the plug from the top down in electric bicycle's battery slot when using like this, can realize the plug and electric bicycle's electricity and peg graft, the battery can also be guaranteed to the gravity of battery self in addition and electric bicycle's reliable electricity is connected.

On this basis, in order to further improve the structural strength of battery and battery slot grafting position, the medial surface of diapire still is equipped with the enhancement protruding muscle.

In addition, the end face of the plug at the inserting side is not higher than the outer side face of the shell wall, so that the whole shape of the battery is regular, stacking and transportation are facilitated, and the plug does not expose the battery shell at the outer side and also plays a certain role in protecting the plug.

And, the roof and the cylindrical shell integrated into one piece or roof and cylindrical shell be the components of a whole that can function independently structure and fixed connection.

Optimally, the shape of the shell wall where the plug is located is a non-circular central symmetrical figure, the plug is arranged at the symmetrical central position of the shell wall where the plug is located, an electric contact part encapsulated in an insulating shell of the plug comprises a positive electrode, a negative electrode and a signal terminal, one of the positive electrode and the negative electrode is located at the central position of the plug and is a central electrode, the other one is a side electrode and surrounds the central electrode together with the signal terminal, the side electrode and the signal terminal jointly form a side terminal group which is used for being in adaptive insertion connection with one side terminal group of more than two side terminal groups of an adaptive socket, at least one containing vacancy which is used for containing other side terminal groups of the socket is also configured on the insulating shell of the plug around the central electrode, the accommodation vacant positions and the side terminal groups of the plug are uniformly distributed around the central electrode, so that the plug and the socket can be plugged at least two circumferential positions.

Furthermore, the containing vacant site has one and is symmetrical with the side terminal group about the center electrode center, the casing wall that the plug is located is the rectangle, can make the battery make cuboid shape like this, not only can realize the grafting of battery and socket tow kinds of states, also makes the shape of battery be relative regular shape, portable transportation.

Preferably, be equipped with the grafting annular that is used for supplying the tube-shape grafting section male of adaptation socket on the insulating casing, just be in form the column grafting section in the grafting annular, the outer end of plug contact all sinks in the column grafting section, also plays better protection like this to each terminal that central electrode and side terminal group correspond.

Furthermore, the end face of the columnar plug section is provided with a groove which is symmetrical about the center of the central electrode, and the groove can be in concave-convex fit with the protrusion on the socket when the plug is plugged into the adaptive socket, so that the bearing strength between the plug and the socket is improved, and the shaking between the plug and the socket is reduced.

Furthermore, the columnar plug-in section is also provided with guide holes which are uniformly distributed around the central electrode and used for guiding and matching with the guide posts of the adaptive socket, so that the guide between the plug and the socket is convenient to realize.

The battery shell comprises a cylindrical shell, and a top wall and a bottom wall which are arranged at two ends of the cylindrical shell, wherein a battery cell is arranged in the battery shell, a plug which is used for being plugged with a charging device or a vehicle body is arranged on one shell wall of the battery shell, the plug comprises an insulating shell and an electric contact which is packaged in the insulating shell, the inner end of the electric contact is in conductive connection with the battery cell, and the insulating shell and the shell wall where the plug is arranged are of an integrated structure.

According to the quick-change battery, the insulating shell of the plug and the shell wall of the battery shell are arranged into an integrated structure, the plug and the battery shell are connected reliably, the electric contact pieces are packaged in the insulating shell, the sealing effect of the plug is good, the integrated structure of the insulating shell of the plug and the battery shell avoids a connecting gap formed by the detachable connection of the insulating shell of the plug and the battery shell, and the problem of sealing failure is avoided.

Further, the plug sets up on the diapire, diapire and tube-shape casing releasable connection, directly insert the plug from the top down in electric bicycle's battery slot when using like this, can realize the plug and electric bicycle's electricity and peg graft, the battery can also be guaranteed to the gravity of battery self in addition and electric bicycle's reliable electricity is connected.

On this basis, in order to further improve the structural strength of battery and battery slot grafting position, the medial surface of diapire encircles the plug and is equipped with the enhancement protruding muscle.

In addition, the end face of the plug at the inserting side is not higher than the outer side face of the shell wall, so that the whole shape of the battery is regular, stacking and transportation are facilitated, and the plug does not expose the battery shell at the outer side and also plays a certain role in protecting the plug.

And, the roof and the cylindrical shell integrated into one piece or roof and cylindrical shell be the components of a whole that can function independently structure and fixed connection.

Optimally, the shape of the shell wall where the plug is located is a non-circular central symmetrical figure, the plug is arranged at the symmetrical central position of the shell wall where the plug is located, an electric contact part encapsulated in an insulating shell of the plug comprises a positive electrode, a negative electrode and a signal terminal, one of the positive electrode and the negative electrode is located at the central position of the plug and is a central electrode, the other one is a side electrode and surrounds the central electrode together with the signal terminal, the side electrode and the signal terminal jointly form a side terminal group which is used for being in adaptive insertion connection with one side terminal group of more than two side terminal groups of an adaptive socket, at least one containing vacancy which is used for containing other side terminal groups of the socket is also configured on the insulating shell of the plug around the central electrode, the accommodation vacant positions and the side terminal groups of the plug are uniformly distributed around the central electrode, so that the plug and the socket can be plugged at least two circumferential positions.

Furthermore, the containing vacant site has one and is symmetrical with the side terminal group about the center electrode center, the casing wall that the plug is located is the rectangle, can make the battery make cuboid shape like this, not only can realize the grafting of battery and socket tow kinds of states, also makes the shape of battery be relative regular shape, portable transportation.

Preferably, be equipped with the grafting annular that is used for supplying the tube-shape grafting section male of adaptation socket on the insulating casing, just be in form the column grafting section in the grafting annular, the outer end of plug contact all sinks in the column grafting section, also plays better protection like this to each terminal that central electrode and side terminal group correspond.

Furthermore, the end face of the columnar plug section is provided with a groove which is symmetrical about the center of the central electrode, and the groove can be in concave-convex fit with the protrusion on the socket when the plug is plugged into the adaptive socket, so that the bearing strength between the plug and the socket is improved, and the shaking between the plug and the socket is reduced.

Furthermore, the columnar plug-in section is also provided with guide holes which are uniformly distributed around the central electrode and used for guiding and matching with the guide posts of the adaptive socket, so that the guide between the plug and the socket is convenient to realize.

Drawings

Fig. 1 is a schematic diagram illustrating a state where the quick-change battery and the adapter socket of the present invention are not plugged;

fig. 2 is a cross-sectional view showing the insertion position of the quick-change battery of the present invention when it is inserted into the adapter socket;

fig. 3 is a schematic diagram of a receptacle adapted to accommodate a quick-change battery of the present invention;

fig. 4 is a schematic view showing the construction of the bottom wall of the quick-change battery of the invention and the plug thereon;

FIG. 5 is a schematic view of the backside of FIG. 4;

description of reference numerals: 1-a battery case; 10-a plug; 101-plug insulating housing; 102-plug side electrodes; 1020-a side electrode lead; 103-plug center electrode; 1030-center electrode lead; 104-plug signal terminals; 1040-signal lines; 1041-plug signal terminals; 105-an insertion ring groove; 106-a pilot hole; 107-insulating isolation ring groove; 108-bar-shaped grooves; 11-a bottom wall; 110-connecting the skirt; 1100-reinforcing ribs; 9-installing a panel; 90-a socket; 92-socket side electrodes; 93-socket center electrode; 94-socket signal terminals; 95-cylindrical plug section; 96-guide post; 97-insulating isolating convex ring; 98-convex strip.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings.

The quick-change battery is mainly used for the electric bicycle, and certainly, can not be used for the electric automobile. As shown in fig. 1-2, the quick-change battery of the present invention includes a battery housing 1, the battery housing 1 includes a cylindrical housing, and a top plate and a bottom wall 11 disposed at two ends of the cylindrical housing, wherein the top wall may be disposed integrally with the cylindrical housing or may be separately connected, which is not specifically limited in this embodiment; the bottom wall 11 includes main wall board and sets up the connection shirt rim 110 at main wall board edge, is equipped with buckle structure on the connection shirt rim 110 for be connected with the tube-shape casing joint, of course, can carry out the viscose after the joint is connected and seal, perhaps sets up the sealing washer in joint hookup location upside or downside, realizes sealedly through compressing tightly between connection shirt rim and the tube-shape casing behind the joint. In this embodiment, diapire 11 is the rectangle structure, correspondingly, the cross-section of tube-shape casing be with the rectangle of diapire shape adaptation, make the battery be the cuboid structure on the whole like this, the shape is comparatively regular, be convenient for put things in good order and transportation.

A battery cell (not shown) is mounted in the battery case 1, and a plug 10 is further disposed on the bottom wall 11 of the battery case 1. The plug 10 is mainly used for being directly plugged with sockets on an electric bicycle and a charging cabinet to realize power supply and charging of a battery. The plug 10 includes a plug insulating housing 101 and an electrical contact encapsulated in the plug insulating housing 101 by potting, and the electrical contact is electrically connected with the battery cell. In order to ensure the connection reliability and the sealing performance of the plug 10 and the battery housing 1, the plug insulating housing 101 and the bottom wall 11 are integrally formed, and obviously, the battery can be more reliably used when vibration and impact are encountered during the driving process of the electric bicycle.

Therefore, the plug 10 is arranged on the bottom wall 11, so that the plug and the electric bicycle can be electrically plugged when the quick-change battery is directly inserted into a battery slot of the electric bicycle from top to bottom in use, and the battery can be reliably and electrically connected with the electric bicycle by the gravity of the battery.

In order to further enhance the convenience of the quick-change battery during the insertion, the plug of the quick-change battery and the receptacle adapted to the plug are also specially designed, and the structure of the receptacle will be described with reference to fig. 3 to describe the structure of the plug in this embodiment.

As shown in fig. 3, the socket 90 includes a socket insulating housing, and the socket insulating housing includes a cylindrical base body and a connection square plate disposed outside the cylindrical base body, and the connection square plate is provided with a connection hole for fixedly connecting with the mounting panel 9 of the electric bicycle or the charging cabinet. A section of the cylindrical base body exceeding the connecting square disc forms a cylindrical plug-in section 95 used for being plugged with the plug 10, an electric contact of the socket 90 is located in the cylindrical base body and is connected with a socket insulating shell through glue pouring, and the contact of the socket 90 mainly comprises a socket positive pole and a socket negative pole used for power transmission and a socket signal terminal 94 used for signal transmission.

As shown in fig. 3, the positive electrode of the positive and negative electrodes of the socket is located at the center of the socket and is called the socket center electrode 93, the negative electrode of the positive and negative electrodes of the socket is located at the side of the socket center electrode 93 and is called the socket side electrode 92, and the socket signal terminal 94 is also arranged around the socket center electrode 93. It should be noted that, specifically, there are two socket cathodes, i.e., two socket side electrodes 92, and the socket central electrode 93 is uniformly distributed as a center, and there are six socket signal terminals 94, and the socket central electrode is uniformly distributed as a center, as can be seen from fig. 3, specifically, two socket side electrodes 92 are respectively symmetrically disposed on two sides of the socket central electrode 93, three of the six socket signal terminals 94 are located on one side of a connection line of the two socket side electrodes 92, and the other three are located on the other side of the connection line of the two socket side electrodes 92. Since the receptacle 90 requires only a minimum of one positive terminal, one negative terminal and four signal terminals when being plugged into a plug for charging, the receptacle negative and receptacle signal terminals 94 arranged as described above can be mated with the receptacle positive terminals to form two sets of receptacle plug terminals for electrically conductive plugging into the plug. In more detail, the socket plug terminal group uses the socket central electrode 93 as the positive electrode, uses one of the socket side electrodes 92 as the negative electrode, and uses the middle one of the three socket signal terminals 94 located on one side of the connection line of the two socket side electrodes 92 and the three socket signal terminals 94 located on the other side of the connection line of the two socket side electrodes 92 as the four socket signal terminals 94 used in the plug, that is, the two groups of socket plug terminal groups share the same socket central electrode 93 and two socket signal terminals 94, wherein the two shared socket signal terminals 94 are the middle one of the three socket signal terminals 94 located on one side of the connection line of the two socket side electrodes 92.

The structural design of the socket described above provides conditions for the plug to realize 180-degree rotation positive and negative insertion, and of course, the structure of the plug also needs to be designed correspondingly. The plug structure will be described below in conjunction with the structure of the socket. For the convenience of the following description and explanation, the socket side electrodes and the socket signal terminals in the same plug-in terminal group in the socket are defined as a socket side terminal group (i.e. the socket in this embodiment includes two socket side terminal groups).

The plug 10 is located at the center of the rectangular bottom wall, the plug insulating housing 101 is provided with a plug ring groove 105, a cylindrical plug section is formed in the plug ring groove 105, and the plug ring groove 105 is used for inserting the cylindrical plug section 95 when the plug and the socket are correspondingly plugged. The columnar plug section is provided with a mounting hole for mounting a contact element, the electrical contact element packaged in the mounting hole by glue pouring comprises a plug positive electrode, a plug negative electrode and plug signal terminals 104, the plug positive electrode is positioned at the center of the plug and is a plug central electrode 103, the plug negative electrode is a plug side electrode 102 and surrounds the plug central electrode 103 together with the four plug signal terminals 104, the plug central electrode 103, the plug side electrode 102 and the plug signal terminals 104 jointly form a plug terminal group, and the plug 10 only has one plug terminal group. The plug side electrodes 102 and the plug signal terminals 104 together form a plug side terminal group for correspondingly plugging with one of the two socket side terminal groups of the socket, and the plug insulating housing is further provided with an accommodation vacancy surrounding the plug central electrode 103 for accommodating at least part of the contact elements of the other socket side terminal group of the socket. It should be noted that, since the two socket side terminal groups of the socket 90 share the two socket signal terminals 94, the accommodation space herein is an accommodation space containing one socket side electrode 92 and two socket signal terminals 94, and if the two socket side terminal groups of the socket 90 do not share the socket signal terminals 94, the accommodation space should contain accommodation spaces corresponding to one socket side electrode 92 and four socket signal terminals 94.

In other words, as shown in fig. 4, nine plug sites are provided on the cylindrical plug section of the plug insulating housing 101 corresponding to the contacts of the receptacle, that is, one plug site at the center for providing the plug center electrode 103, two plug sites at the side of the plug center electrode 103 for providing the plug side electrodes 102, and six plug sites at the side of the plug center electrode 103 for providing the plug signal terminals 104, however, only one plug positive electrode, one plug negative electrode, and four plug signal terminals 104 are provided on these plug sites, and the relative positions of the six contacts are consistent with the arrangement positions of the six receptacle contacts in the plug terminal group of the receptacle, and no contact is provided at the rest plug sites to form an accommodation space.

Therefore, the plug 10 is located at the center of the bottom wall 11, the plug 10 is provided with a plug plugging terminal group corresponding to a certain socket plugging terminal group of the adaptive socket, and the plug 10 is also provided with a containing vacancy for containing at least part of the contact element of the other socket side terminal group, so that the plug and the socket can still be plugged when the quick-change battery rotates for 180 degrees, the battery does not need to be kept in a specific shape and position state during plugging, and the plug is very convenient.

Of course, in the above embodiments, only two sets of socket plug-in terminal sets are taken as an example for description, and if there are three or four sets of socket plug-in terminal sets, at this time, more accommodation vacant positions need to be provided on the plug to ensure that when the plug-in terminal set and a certain socket plug-in terminal set are correspondingly plugged, other contacts on the socket do not interfere with the plug. Naturally, the shape of the battery case is changed correspondingly, for example, when the socket has three sets of socket plug-in terminal sets, the quick-change battery can be plugged in at three circumferential angles, and at this time, the quick-change battery is preferably made into a regular triangle in cross section; similarly, when the socket has four socket plug-in terminal sets, the quick-change battery can be plugged at four circumferential angles, and the quick-change battery is made into a square shape, so that the cost is not increased too much, the number of the socket plug-in terminal sets is not too much, the quick-change battery is not made into a cylindrical shape, and the determination of the initial angle of the battery plug-in is not facilitated, and the quick plug-in alignment is inconvenient.

In addition, for the convenience of guiding, the socket 90 is further provided with guide posts 96, the number of the guide posts 96 is equal to that of the socket side electrodes 92 and is uniformly distributed around the socket central electrode 93, correspondingly, the plug 10 is provided with guide holes 106 corresponding to the guide posts 96 and matched with the guide posts 96 in a guiding manner, and the guide holes 106 are uniformly distributed around the plug central electrode 103. When the quick-change battery is inserted in a mode of changing angles, the guide posts on the socket can be just inserted into the guide holes of the plug.

The plug contact in this embodiment is a jack contact adapted to the pin-type socket contact, and the outer ends of the plug central electrode 103 and each contact of the plug side terminal group are both sunk in the cylindrical plug section, so as to better protect each contact corresponding to the plug central electrode 103 and the side terminal group. In addition, in order to ensure the insulation isolation between the positive pole and the negative pole, an insulation isolation convex ring 97 is annularly arranged on the outer side of the socket central electrode 93 on the socket, correspondingly, an insulation isolation ring groove 107 is arranged on the outer side of the plug central electrode 103 on the plug insulation shell 101, and when the plug and the socket are plugged, the insulation isolation convex ring 97 is inserted into the insulation isolation ring groove 107. Still be equipped with on the column grafting section about plug center electrode 103 centrosymmetric bar recess 108, the last sand grip 98 that corresponds of socket insulation housing is equipped with, and when plug, socket peg graft, bar recess 108 and sand grip 98 unsmooth cooperation improve the bearing strength between plug, the socket, reduce rocking between plug, the socket.

Fig. 5 shows a schematic structural diagram of the inner side of the bottom wall of the quick-change battery, a central electrode lead 1030 is connected to the plug central electrode 103 and is used for being connected to the positive electrode of the battery cell, a side electrode lead 1020 is connected to the plug side electrode 102 and is used for being connected to the negative electrode of the battery cell, a signal line 1040 is connected to the plug signal terminal 104, and the end of the signal line 1040 is connected to a plug signal terminal 1041 and is connected to the battery cell through the plug signal terminal 1041 to obtain a state signal of the battery cell.

An embodiment of the quick-change battery according to the invention is described above in connection with an adapter socket, although the quick-change battery according to the invention is not limited to the above-described embodiment. For example, in other embodiments, the plug may be disposed on a sidewall of the cylindrical housing, so as to implement plugging in a horizontal direction; the plug side end face of the plug can also protrude out of the outer side face of the shell wall, and the plug is easy to collide. In the above embodiments, the central position of the plug and the central position of the socket are both positive electrodes, in other embodiments, the central position of the plug and the central position of the socket can be a negative electrode, and at this time, the positive electrodes are alternatively arranged at the positions of the negative electrodes in the above embodiments, and the number of the positive electrodes is the same as that of the negative electrodes; or in other embodiments, the insulating housing of the plug may have a cylindrical plug section, the insulating housing of the socket may be provided with a cylindrical plug section, the socket contact is sunken in the cylindrical plug section, and the plug contact is suspended in the cylindrical plug section; the socket contact may also be a socket contact and correspondingly the plug contact may also be a pin contact.

Embodiments of the battery case of the present invention: the specific structure of the battery case is the same as that of the battery case in the above-described embodiment of the quick-change battery, and will not be described in detail here.