CN220138397U - Battery pack - Google Patents

Abstract

The utility model discloses a battery pack. The battery pack comprises single batteries and a slave control component. The slave control assembly comprises a shell, wherein the shell is provided with a containing cavity. The slave control assembly further comprises a first slave control circuit board, the first slave control circuit board is accommodated in the accommodating cavity, and the first slave control circuit board is electrically connected with the single battery. The secondary control assembly further comprises a second secondary control circuit board which is accommodated in the accommodating cavity and electrically connected with the single battery. By the mode, the space utilization rate of the slave control assembly can be improved, and the assembly convenience of the slave control assembly can be improved.

Description

Battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery pack.

Background

A BMS (Battery Management System ) is an electronic device capable of monitoring and managing batteries. The BMS collects and calculates parameters such as voltage, current, temperature, state Of Charge (SOC), and the like, so as to control the Charge and discharge processes Of the battery, realize the protection Of the battery, improve the comprehensive performance Of the battery, and the like.

The BMS is generally integrated with a plurality of slave control units for collecting parameter information of the battery cells. The circuit board of slave control unit in traditional BMS assembles with the shell one to one, because every slave control circuit board all needs to be equipped with corresponding shell, leads to the space utilization of slave control unit lower. In addition, pin holes are needed to be formed between the shells of the slave control units, and the slave control units are assembled in a bolt manner, so that the feasibility of the assembly manner is limited and inconvenient.

Disclosure of Invention

The utility model provides a battery pack, which can improve the space utilization rate of a slave control assembly and improve the assembly convenience of the slave control assembly.

The utility model provides a battery pack. The battery pack comprises single batteries and a slave control component. The slave control assembly comprises a shell, wherein the shell is provided with a containing cavity. The slave control assembly further comprises a first slave control circuit board, the first slave control circuit board is accommodated in the accommodating cavity, and the first slave control circuit board is electrically connected with the single battery. The secondary control assembly further comprises a second secondary control circuit board which is accommodated in the accommodating cavity and electrically connected with the single battery.

In an embodiment of the utility model, the slave control component has a first direction, a second direction and a reference plane, and the first direction is perpendicular to the second direction and the reference plane, respectively; the first slave control circuit board comprises a first circuit board main body, a first connector arranged on the first circuit board main body, a first wire harness and a single battery, wherein the single battery is electrically connected with the first connector through the first wire harness; the secondary control circuit board comprises a second circuit board main body, a second connector arranged on the second circuit board main body, a second wire harness and a single battery, wherein the single battery is electrically connected with the second connector through the second wire harness; the first circuit board main body and the second circuit board main body are arranged in a stacked mode in the second direction, the first connector is located on one side, facing the second circuit board main body, of the first circuit board main body, and the second connector is located on one side, facing the first circuit board main body, of the second circuit board main body; the first connector and the second connector are disposed opposite to each other along a first direction, and an orthographic projection of the first connector on a reference plane at least partially overlaps an orthographic projection of the second connector on the reference plane.

In an embodiment of the present utility model, the first slave circuit board includes: the first circuit board main body is connected with the shell; the slave control assembly further comprises a first wire harness electrically connected with the single battery, and the first wire harness is connected with the first connector through the first connection port; the second slave control circuit board comprises: the second circuit board main body is connected with the shell; the secondary control assembly further comprises a second wire harness electrically connected with the single battery, and the second wire harness is connected with the second connector through the second connection port; the orientation of the first connecting port is different from the orientation of the second connecting port.

In an embodiment of the present utility model, the orientation of the first connection port is opposite to the orientation of the second connection port.

In one embodiment of the utility model, the housing comprises: the first shell is connected with the first slave control circuit board and is provided with a first connecting structure; the second shell is connected with the second slave control circuit board and is provided with a second connecting structure; the first connection structure and the second connection structure are used for being matched and connected after the first slave control circuit board is connected with the first shell and the second slave control circuit board is connected with the second shell.

In an embodiment of the utility model, the slave control assembly has a first direction and a second direction, the first direction is perpendicular to the second direction, the first direction is a direction in which the first shell moves relative to the second shell, and the first slave control circuit board and the second slave control circuit board are stacked along the second direction; the first connection structure comprises a tongue insertion piece; the second connecting structure comprises a buckling piece, the buckling piece is provided with a buckling groove, the buckling groove extends along a first direction, and one end of the buckling groove in the first direction is an opening; the inserting tenon piece is embedded into the buckling groove through the opening, and the inserting tenon piece is matched with the buckling piece to limit the relative position of the first shell and the second shell in the second direction.

In an embodiment of the utility model, the fastener further includes: the first limiting part extends along a first direction and is matched with the inserting falcon piece to limit the relative position of the first shell and the second shell in a second direction; and the second limiting part is connected to the end part of the first limiting part, which is far away from the opening, and the first limiting part and the second limiting part are matched and encircled to form a buckling groove, and the second limiting part is used for abutting against the falcon inserting piece after the falcon inserting piece is embedded into the buckling groove so as to limit the first shell to move along the first direction relative to the second shell.

In an embodiment of the utility model, the slave control assembly has a first direction and a second direction, the first direction is perpendicular to the second direction, the first direction is a direction in which the first shell moves relative to the second shell, and the first slave control circuit board and the second slave control circuit board are stacked along the second direction; the first connecting structure comprises a retaining piece, the second connecting structure comprises a retaining groove, the retaining piece is embedded into the retaining groove, and the retaining piece and the retaining groove are matched to limit the first shell to move along the opposite direction of the first direction relative to the second shell.

In an embodiment of the present utility model, the slave control component further has a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; the first connection structure further includes: the connecting piece comprises a main body part and a connecting part, the main body part is connected with the first shell, and the retaining piece is connected with the main body part through the connecting part; the connecting part is provided with movable grooves on two sides in the third direction, and the movable grooves extend towards the second shell to penetrate through the connecting piece.

In an embodiment of the present utility model, the first connection structure further includes: a connecting member connected to the first housing, and a stopper connected to the connecting member, wherein the connecting member and the first housing are spaced apart from each other in a second direction to form a relief area; the second slave control circuit board comprises: the second circuit board main body is connected with the second shell; and the second connector is arranged on the second circuit board main body, and the avoidance area exposes the second connector.

The beneficial effects of the utility model are as follows: the present utility model provides a battery pack, unlike the prior art. The slave control assembly of the battery pack comprises a shell, wherein the shell is provided with a containing cavity. The secondary control assembly further comprises a first secondary control circuit board and a second secondary control circuit board, wherein the first secondary control circuit board and the second secondary control circuit board are both accommodated in the accommodating cavity, and the first secondary control circuit board and the second secondary control circuit board are both electrically connected with the single battery of the battery pack. In other words, in the slave control assembly of the present utility model, at least two circuit boards (i.e., the first slave control circuit board and the second slave control circuit board) are integrated into one set of the housing, which is different from the case that the circuit boards of the slave control units are assembled with the housing one to one in the prior art, the present utility model can improve the space utilization of the slave control assembly.

In addition, the group of shells of the slave control assembly is at least integrated with two circuit boards, which means that the number of shells of the slave control assembly in the battery pack is small, and the mode of arranging pin holes between the shells and assembling bolts can be avoided to a certain extent, so that the convenience of assembling the slave control assembly can be improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an embodiment of a slave control assembly according to the present utility model;

FIG. 2 is a schematic diagram of an exploded view of the slave assembly of FIG. 1;

FIG. 3 is a schematic view of a cross-sectional structure of the slave assembly A-A shown in FIG. 1;

FIG. 4 is a schematic view of the structure of a first embodiment of the first housing of the present utility model;

FIG. 5 is a schematic view of a second embodiment of the present utility model;

FIG. 6 is a schematic view showing a sectional structure of the second housing in the direction B-B shown in FIG. 5;

fig. 7 is a schematic structural view of the slave unit C area shown in fig. 3.

Reference numerals illustrate:

10 a slave control assembly; 11 a housing; 111 a first housing; 112 a second housing; 113 a receiving chamber; 12 a first slave control circuit board; 121 a first circuit board body; 122 a first connector; 123 a first connection port; 13 a second slave control circuit board; 131 a second circuit board body; 132 a second connector; 133 a second connection port; 14 a first connection structure; 141 inserting a falcon piece; 142 backstop; 143 a connector; 144 a main body portion; 145 connection portions; 146 active slots; 147 avoiding area; 15 a second connection structure; 151 buckling pieces; 152 snap grooves; 153 opening; 154 a first limit portion; 155 a second limit portion; 156 retaining grooves.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the utility model. In the present utility model, unless otherwise indicated, terms of orientation such as "upper", "lower", "left" and "right" are generally used to refer to the directions of the upper, lower, left and right sides of the device in actual use or operation, and are specifically shown in the drawings.

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

The present utility model provides a battery pack, which will be described in detail below. It should be noted that the following description order of the embodiments is not intended to limit the preferred order of the embodiments of the present utility model. In the following embodiments, the descriptions of the embodiments are focused on, and for the part that is not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.

In order to solve the technical problems of low space utilization rate, limited feasibility of an assembly mode and inconvenience of the slave control unit in the prior art, an embodiment of the utility model provides a battery pack. The battery pack comprises single batteries and a slave control component. The slave control assembly comprises a shell, wherein the shell is provided with a containing cavity. The slave control assembly further comprises a first slave control circuit board, the first slave control circuit board is accommodated in the accommodating cavity, and the first slave control circuit board is electrically connected with the single battery. The secondary control assembly further comprises a second secondary control circuit board which is accommodated in the accommodating cavity and electrically connected with the single battery. As will be described in detail below.

In one embodiment, the battery pack includes a plurality of individual batteries arranged in groups. The unit cell includes, but is not limited to, a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, which is not limited by the embodiment of the present utility model. The battery pack is used for providing electric energy for the electric device. The electric device can be a mobile phone, portable equipment, a notebook computer, a battery car, an electric automobile, a ship, a spacecraft, an electric toy, an electric tool and the like. For example, spacecraft include airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, electric planers, and the like.

The battery pack also includes a battery management system. The battery management system is an electronic device capable of monitoring and managing the unit batteries. The battery management system collects and calculates parameters such as voltage, current, temperature and SOC, so as to control the charging and discharging processes of the single battery, realize the protection of the single battery, improve the comprehensive performance of the single battery and the like. Specifically, the battery management system is integrated with a slave control component, and the slave control component is used for collecting parameter information of the single battery.

The slave control assembly of the embodiment of the present utility model is explained below.

Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of an embodiment of a slave control assembly according to the present utility model, fig. 2 is a schematic exploded structural diagram of the slave control assembly shown in fig. 1, and fig. 3 is a schematic sectional structural diagram of the slave control assembly in A-A direction shown in fig. 1.

In one embodiment, the slave assembly 10 includes a housing 11. The shell 11 is a basic carrier of the slave control assembly 10, and the shell 11 plays a role in bearing and protecting the rest parts of the slave control assembly 10. Wherein the housing 11 has a receiving cavity 113. It should be noted that, the slave control assemblies 10 are in one-to-one correspondence with the housings 11, that is, a group of slave control assemblies 10 includes only a group of housings 11.

The slave assembly 10 further includes a first slave circuit board 12. The first slave control circuit board 12 is accommodated in the accommodating cavity 113, and the first slave control circuit board 12 is electrically connected with the single battery. The slave assembly 10 further comprises a second slave circuit board 13. The second slave control circuit board 13 is accommodated in the accommodating cavity 113, and the second slave control circuit board 13 is electrically connected with the single battery. The first slave control circuit board 12 and the second slave control circuit board 13 are both used for collecting parameter information of the single battery.

In this way, in the slave module 10 of the present embodiment, at least two circuit boards (i.e., the first slave circuit board 12 and the second slave circuit board 13) are integrated in one set of the housing 11, which is different from the case where the circuit boards of the slave units are assembled with the housings one to one in the prior art, and the space utilization of the slave module 10 can be improved in this embodiment. In addition, the at least two circuit boards are integrated with the one group of the housings 11 of the slave control assembly 10 in the embodiment, which means that the number of the housings 11 of the slave control assembly 10 in the battery pack in the embodiment is small, and a manner of forming pin holes between the housings 11 and assembling bolts can be avoided to a certain extent, so that the convenience of assembling the slave control assembly 10 can be improved.

In one embodiment, the slave control assembly 10 has a first direction (as indicated by arrow X in fig. 2 and 3, the same applies hereinafter), a second direction (as indicated by arrow Z in fig. 2 and 3, the same applies hereinafter), and a reference plane (as indicated by plane α in fig. 3, the same applies hereinafter). The first direction is perpendicular to the second direction and the reference plane, respectively.

The first slave control circuit board 12 includes a first circuit board body 121 and a first connector 122, the first connector 122 is disposed on the first circuit board body 121, and the first circuit board body 121 is electrically connected to the first connector 122. The slave control assembly 10 further includes a first wire harness through which the unit battery is electrically connected to the first connector 122, so that the first slave control circuit board 12 can collect parameter information of the unit battery. The second slave control circuit board 13 includes a second circuit board main body 131 and a second connector 132, wherein the second connector 132 is disposed on the second circuit board main body 131, and the second circuit board main body 131 is electrically connected with the second connector 132. The slave control assembly 10 further includes a second wire harness through which the single battery is electrically connected to the second connector 132, so that the second slave control circuit board 13 can collect parameter information of the single battery.

The first connector 122 and the second connector 132 are disposed opposite to each other along the first direction. The first circuit board body 121 and the second circuit board body 131 are stacked in the second direction. The first connector 122 is located on a side of the first circuit board body 121 facing the second circuit board body 131, i.e., the first connector 122 and the first circuit board body 121 constitute an "L" like configuration. The second connector 132 is located on a side of the second circuit board body 131 facing the first circuit board body 121, i.e., the second connector 132 and the second circuit board body 131 constitute an "L" -like configuration.

The front projection of the first connector 122 onto the reference plane at least partially overlaps the front projection of the second connector 132 onto the reference plane. In this way, after the first slave circuit board 12 and the second slave circuit board 13 are stacked along the second direction, a complementary structure is formed between the first slave circuit board 12 and the second slave circuit board 13 in space, and at this time, the length of the whole formed by the first slave circuit board 12 and the second slave circuit board 13 in the second direction is smaller than the sum of the lengths of the first slave circuit board 12 and the second slave circuit board 13 in the second direction. In other words, the length of the whole formed by the first slave control circuit board 12 and the second slave control circuit board 13 in the second direction is smaller, which is beneficial to reducing the length of the slave control assembly 10 in the second direction, and further improving the space utilization rate of the slave control assembly 10. For example, in the case where the circuit boards and the housings of the slave units are assembled one to one in the prior art, the volumes of the two sets of slave units are not smaller than 1395cm3, but the volume of the slave unit 10 in the present embodiment can be reduced to about 738cm3, so that the space utilization of the slave unit 10 in the present embodiment is doubled.

It should be noted that, in the present embodiment, the first connector 122 and the second connector 132 are located on opposite sides of the slave control assembly 10, respectively. Of course, in other embodiments of the present utility model, the first connector 122 and the second connector 132 may be respectively located on two adjacent sides of the slave control assembly 10, which is not limited herein.

In one embodiment, the first connector 122 has a first connection port 123, and the first wire harness is connected to the first connector 122 through the first connection port 123, that is, the first wire harness is inserted into the first connector 122 through the first connection port 123. The second connector 132 has a second connection port 133, and the second harness is connected to the second connector 132 through the second connection port 133, that is, the second harness is inserted into the second connector 132 through the second connection port 133. Wherein, the orientation of the first connection port 123 is different from the orientation of the second connection port 133. In this way, the distribution density of the wire harnesses connected to the slave control assembly 10 can be reduced, so that the wire harnesses can be conveniently connected to the slave control assembly 10.

For the condition that the circuit boards and the shells of the slave control units are assembled one by one in the prior art, the two groups of slave control units are respectively provided with a circuit board, the connectors on the two circuit boards are the same in orientation, and all wire harnesses are connected with the two groups of slave control units on the same side, so that the distribution density of the wire harnesses in the prior art is high, and the wire harnesses are inconvenient to be connected with the slave control units. In the present embodiment, the orientation of the first connection port 123 is different from the orientation of the second connection port 133, so that the wire harness connected to the first slave circuit board 12 and the wire harness connected to the second slave circuit board 13 are connected to the first slave circuit board 12 and the second slave circuit board 13 on different sides of the slave module 10, respectively, which means that the distribution density of the wire harnesses connected to the slave module 10 is reduced in the present embodiment, so that the wire harnesses can be conveniently connected to the slave module 10.

Further, the first connection port 123 is oriented opposite to the second connection port 133, i.e. the first connection port 123 and the second connection port 133 are respectively oriented towards opposite sides of the slave control assembly 10. Of course, in other embodiments of the present utility model, the first connection port 123 and the second connection port 133 may also face the adjacent two sides of the slave control assembly 10, which is not limited herein.

In one embodiment, the housing 11 includes a first housing 111 and a second housing 112, and the first housing 111 and the second housing 112 are abutted to form a receiving cavity 113. The first housing 111 is connected to the first slave circuit board 12, and specifically, the first circuit board body 121 of the first slave circuit board 12 is connected to the first housing 111 by a fastener such as a fastener or a bolt. The second housing 112 is connected to the second slave circuit board 13, and specifically, the second circuit board body 131 of the second slave circuit board 13 is connected to the second housing 112 by fastening means such as a fastener or a bolt.

In this embodiment, after the first slave circuit board 12 is connected to the first housing 111 and the second slave circuit board 13 is connected to the second housing 112, the first housing 111 and the second housing 112 are then abutted to form the accommodating cavity 113. In other words, the present embodiment provides a simple and convenient assembly method, which can conveniently assemble the slave control assembly 10, and further improve the convenience of assembling the slave control assembly 10.

It should be noted that, the first housing 111 moves in a first direction relative to the second housing 112 to perform the docking, i.e., the first direction is a direction in which the first housing 111 moves relative to the second housing 112. The first slave circuit board 12 and the second slave circuit board 13 are stacked in the second direction. In the embodiment of the utility model, the first connector 122 and the second connector 132 are respectively located at two opposite sides of the slave control assembly 10, and can match the assembly mode that the first housing 111 moves along the first direction relative to the second housing 112 for docking.

Referring to fig. 4 to 6, fig. 4 is a schematic structural diagram of a first embodiment of the first housing of the present utility model, fig. 5 is a schematic structural diagram of a second embodiment of the second housing of the present utility model, and fig. 6 is a schematic sectional structural diagram of the second housing B-B shown in fig. 5.

In one embodiment, the first housing 111 has a first connection structure 14 and the second housing 112 has a second connection structure 15. The first connection structure 14 and the second connection structure 15 are used for being connected in a matching manner after the first slave circuit board 12 is connected with the first housing 111 and the second slave circuit board 13 is connected with the second housing 112, so as to butt-joint the first housing 111 and the second housing 112 to form a containing cavity 113.

In one embodiment, first connection structure 14 includes a tongue insertion member 141. The second connection structure 15 includes a buckle 151. The locking piece 151 has a locking groove 152, the locking groove 152 extends along a first direction, and one end of the locking groove 152 in the first direction is an opening 153. Insert 141 is inserted into retaining groove 152 through opening 153, and specifically insert 141 is inserted into retaining groove 152 through opening 153 during the process of interfacing first housing 111 with second housing 112. Insert 141 cooperates with retainer 151 to limit the relative positions of first housing 111 and second housing 112 in the second direction.

Specifically, insert 141 extends in a first direction. The locking piece 151 further includes a first limiting portion 154 and a second limiting portion 155. The first limiting portion 154 extends along the first direction, and specifically, the first limiting portion 154 cooperates with the inserting tenon member 141 to limit the relative position of the first housing 111 and the second housing 112 in the second direction. The second limiting portion 155 is connected to an end portion of the first limiting portion 154 away from the opening 153, the second limiting portion 155 extends along the second direction, and the first limiting portion 154 and the second limiting portion 155 are surrounded to form the buckling groove 152. The second limiting portion 155 is configured to abut against the inserting tenon 141 after the inserting tenon 141 is inserted into the fastening slot 152, so as to limit the first housing 111 to move along the first direction relative to the second housing 112.

For example, the slave control assembly 10 further has a third direction (as indicated by arrow Y in fig. 2 and 4, the following description indicates that the first direction, the second direction and the third direction are perpendicular to each other. The first housing 111 is provided with a plurality of inserting tenon pieces 141 at both sides in the third direction, respectively, and the inserting tenon pieces 141 at each side on the first housing 111 are sequentially spaced apart in the first direction. Correspondingly, a plurality of buckling pieces 151 are respectively arranged on two sides of the second shell 112 in the third direction, and the buckling pieces 151 on each side of the second shell 112 are sequentially distributed at intervals along the first direction. Insert fastener 141 corresponds one-to-one with fastener 151. In the assembly process of the slave control assembly 10, the first housing 111 and the second housing 112 are assembled along the second direction, and then the first housing 111 moves along the first direction relative to the second housing 112, so that each insert tenon member 141 is embedded into the corresponding buckling slot 152 of the corresponding buckling member 151, and when each insert tenon member 141 abuts against the corresponding second limiting portion 155 of the corresponding buckling member 151, the first housing 111 is limited to move further relative to the second housing 112, and meanwhile, the first limiting portion 154 cooperates with the insert tenon member 141 to limit the relative positions of the first housing 111 and the second housing 112 in the second direction.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a region C of the slave unit shown in fig. 3.

In one embodiment, the first connection structure 14 includes a backstop 142 and the second connection structure 15 includes a backstop groove 156. The retaining member 142 is embedded in the retaining groove 156, and the retaining member 142 cooperates with the retaining groove 156 to limit movement of the first housing 111 relative to the second housing 112 in a direction opposite to the first direction.

In the above manner, the relative positions of the first housing 111 and the second housing 112 in the second direction are restricted by the engagement of the insertion tongue 141 with the first stopper 154 of the fastener 151. The first housing 111 and the second housing 112 are further limited to move relative to the second housing 112 by the engagement of the inserting tenon 141 and the second limiting portion 155 of the buckling piece 151, and the first housing 111 and the second housing 112 are further limited to move in the opposite direction of the first direction relative to the second housing 112 by the engagement of the retaining piece 142 and the retaining groove 156. To this end, the relative position between the first housing 111 and the second housing 112 is fixed.

For example, the retaining member 142 may be a hook structure. The housing 11 has a plurality of sets of the retaining members 142 and the retaining grooves 156, each set of the retaining members 142 and the retaining grooves 156 are sequentially spaced apart in the third direction, and the retaining members 142 and the retaining grooves 156 are in one-to-one correspondence. During the movement of the first housing 111 relative to the second housing 112 in the first direction, when each retaining member 142 is inserted into the corresponding retaining groove 156, the first housing 111 and the second housing 112 are assembled and locked. The first housing 111 and the second housing 112 are matched with the second limiting part 155 of the buckling piece 151 through the inserting tenon piece 141 to limit the first housing 111 to move further relative to the second housing 112, and the first housing 111 and the second housing 112 are matched with the retaining groove 156 through the retaining piece 142 to limit the first housing 111 to move in the opposite direction relative to the second housing 112 in the first direction.

It should be noted that fig. 4 and fig. 7 exemplarily show that the insert pin 141 and the retaining element 142 are both located in the first housing 111, and fig. 6 and fig. 7 exemplarily show that the fastening element 151 and the retaining groove 156 are both located in the second housing 112. Of course, in other embodiments of the present utility model, the insert pin 141 and the retaining element 142 may be located in the first housing 111 and the second housing 112, respectively, and the fastening element 151 and the retaining groove 156 may be located in the first housing 111 and the second housing 112, respectively, which is not limited herein.

Further, as shown in fig. 4, the first connection structure 14 further includes a connection member 143. The connector 143 includes a main body portion 144 and a connecting portion 145. The main body 144 is connected to the first housing 111, and the stopper 142 is connected to the main body 144 via a connection portion 145. Wherein, the two sides of the connecting portion 145 in the third direction are provided with movable slots 146, and the movable slots 146 extend toward the second housing 112 to penetrate the connecting member 143.

In the third direction, each side of the connection portion 145 is spaced from the main body portion 144 by one movable groove 146. Since the movable slots 146 extend toward the second housing 112 to penetrate the connecting piece 143, the movable slots 146 on both sides of the connecting portion 145 enable the connecting portion 145 to have good elastic deformation capability, meaning that the retaining piece 142 on the connecting portion 145 has a suitable amount of activity, so that the retaining piece 142 can be well matched with the assembly mode that the first housing 111 moves along the first direction relative to the second housing 112 to perform docking, and the retaining piece 142 can be reliably embedded into the retaining slot 156 along with the movement of the first housing 111 relative to the second housing 112, so as to realize assembly locking between the first housing 111 and the second housing 112.

Also, the connecting member 143 of the present embodiment is spaced apart from the first housing 111 in the second direction to form the escape area 147. The escape area 147 exposes the second connector 132 of the second slave circuit board 13 to facilitate connection of the wire harness with the second connector 132. Further, the second connector 132 may be disposed to extend through the relief zone 147. During the movement of the first housing 111 relative to the second housing 112 in the first direction, the insert pin 141 is inserted into the retaining groove 152, the stop 142 is inserted into the stop groove 156, and at the same time the second connector 132 protrudes to the outside through the escape area 147.

The assembly process of the slave control assembly 10 according to the embodiment of the present utility model is explained below.

First, the first slave circuit board 12 is connected to the first housing 111, and the second slave circuit board 13 is connected to the second housing 112; then, the first housing 111 and the second housing 112 are assembled along the second direction; thereafter, the first housing 111 is moved relative to the second housing 112 in the first direction, such that the inserting tongue 141 of the first housing 111 is inserted into the fastening slot 152 of the second housing 112; as the first housing 111 moves further relative to the second housing 112, the retaining member 142 on the first housing 111 is inserted into the retaining groove 156 on the second housing 112, while the second connector 132 of the second slave circuit board 13 protrudes to the outside through the relief area 147 on the first housing 111. Thus, the fitting lock between the first housing 111 and the second housing 112 is completed.

In the prior art, the upper shell and the lower shell of the slave control unit are usually fixedly combined by adopting a multi-point buckle or a bolt. In contrast, in the embodiment of the present utility model, the first housing 111 and the second housing 112 are assembled with the second connecting structure 15 through the first connecting structure 14, for example, the inserting tenon member 141, the fastening member 151, the retaining member 142, the retaining groove 156, and the like, and the slave control assembly 10 of the embodiment of the present utility model has a simple and reliable structure and low cost.

In summary, the present utility model provides a battery pack. The slave control assembly of the battery pack comprises a shell, wherein the shell is provided with a containing cavity. The secondary control assembly further comprises a first secondary control circuit board and a second secondary control circuit board, wherein the first secondary control circuit board and the second secondary control circuit board are both accommodated in the accommodating cavity, and the first secondary control circuit board and the second secondary control circuit board are both electrically connected with the single battery of the battery pack. In other words, in the slave control assembly of the present utility model, at least two circuit boards (i.e., the first slave control circuit board and the second slave control circuit board) are integrated into one set of the housing, which is different from the case that the circuit boards of the slave control units are assembled with the housing one to one in the prior art, the present utility model can improve the space utilization of the slave control assembly.

In addition, the group of shells of the slave control assembly is at least integrated with two circuit boards, which means that the number of shells of the slave control assembly in the battery pack is small, and the mode of arranging pin holes between the shells and assembling bolts can be avoided to a certain extent, so that the convenience of assembling the slave control assembly can be improved.

The above description of the battery pack provided by the utility model has been provided in detail, and specific examples are applied herein to illustrate the principles and embodiments of the utility model, and the above examples are only for helping to understand the method and core idea of the utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present utility model, the present description should not be construed as limiting the present utility model in view of the above.

Claims (10)

1. A battery pack comprising a single cell and a slave control assembly, wherein the slave control assembly comprises:

a housing having a receiving cavity;

the first slave control circuit board is accommodated in the accommodating cavity and is electrically connected with the single battery; and

the second slave control circuit board is accommodated in the accommodating cavity and is electrically connected with the single battery.

2. The battery pack of claim 1, wherein the battery pack comprises a plurality of battery cells,

the slave control assembly is provided with a first direction, a second direction and a reference plane, and the first direction is perpendicular to the second direction and the reference plane respectively;

the first slave control circuit board comprises a first circuit board main body and a first connector arranged on the first circuit board main body, the slave control assembly further comprises a first wire harness, and the single battery is electrically connected with the first connector through the first wire harness;

the second slave control circuit board comprises a second circuit board main body and a second connector arranged on the second circuit board main body, the slave control assembly further comprises a second wire harness, and the single battery is electrically connected with the second connector through the second wire harness;

the first circuit board main body and the second circuit board main body are stacked in the second direction, the first connector is located on one side of the first circuit board main body, which faces the second circuit board main body, and the second connector is located on one side of the second circuit board main body, which faces the first circuit board main body;

the first connector and the second connector are disposed opposite in the first direction, and an orthographic projection of the first connector on the reference plane at least partially overlaps an orthographic projection of the second connector on the reference plane.

3. The battery pack of claim 1, wherein the battery pack comprises a plurality of battery cells,

the first slave control circuit board comprises:

the first circuit board main body is connected with the shell; and

the secondary control assembly further comprises a first wire harness electrically connected with the single battery, and the first wire harness is connected with the first connector through the first connection port;

the second slave control circuit board comprises:

the second circuit board main body is connected with the shell; and

the second connector is arranged on the second circuit board main body and is provided with a second connecting port, the slave control assembly further comprises a second wire harness electrically connected with the single battery, and the second wire harness is connected with the second connector through the second connecting port;

the orientation of the first connecting port is different from the orientation of the second connecting port.

4. The battery pack of claim 3, wherein the battery pack comprises a plurality of battery cells,

the orientation of the first connection port is opposite to the orientation of the second connection port.

5. The battery pack of claim 1, wherein the battery pack comprises a plurality of battery cells,

the housing includes:

the first shell is connected with the first slave control circuit board and is provided with a first connecting structure; and

the second shell is connected with the second slave control circuit board and is provided with a second connecting structure;

the first connection structure and the second connection structure are used for being matched and connected after the first slave control circuit board is connected with the first shell and the second slave control circuit board is connected with the second shell.

6. The battery pack of claim 5, wherein the battery pack comprises a plurality of battery cells,

the slave control assembly is provided with a first direction and a second direction, the first direction is perpendicular to the second direction, the first direction is the direction in which the first shell moves relative to the second shell, and the first slave control circuit board and the second slave control circuit board are stacked along the second direction;

the first connection structure includes a tongue insertion member; the second connecting structure comprises a buckling piece, the buckling piece is provided with a buckling groove, the buckling groove extends along the first direction, and one end of the buckling groove in the first direction is an opening; the inserting tenon piece is embedded into the buckling groove through the opening, and the inserting tenon piece is matched with the buckling piece to limit the relative position of the first shell and the second shell in the second direction.

7. The battery pack of claim 6, wherein the battery pack comprises a plurality of battery cells,

the fastener further comprises:

the first limiting part extends along the first direction and is matched with the inserting falcon piece to limit the relative position of the first shell and the second shell in the second direction; and

the second limiting part is connected to the end part, far away from the opening, of the first limiting part, the first limiting part and the second limiting part are matched and encircled to form the buckling groove, and the second limiting part is used for abutting the falcon inserting piece after the falcon inserting piece is embedded into the buckling groove so as to limit the first shell to move along the first direction relative to the second shell.

8. The battery pack of claim 5, wherein the battery pack comprises a plurality of battery cells,

the slave control assembly is provided with a first direction and a second direction, the first direction is perpendicular to the second direction, the first direction is the direction in which the first shell moves relative to the second shell, and the first slave control circuit board and the second slave control circuit board are stacked along the second direction;

the first connecting structure comprises a retaining piece, the second connecting structure comprises a retaining groove, the retaining piece is embedded into the retaining groove, and the retaining piece is matched with the retaining groove to limit the first shell to move relative to the second shell along the opposite direction of the first direction.

9. The battery pack of claim 8, wherein the battery pack comprises a plurality of battery cells,

the slave control assembly is further provided with a third direction, and the first direction, the second direction and the third direction are mutually perpendicular;

the first connection structure further includes:

the connecting piece comprises a main body part and a connecting part, the main body part is connected with the first shell, and the retaining piece is connected with the main body part through the connecting part;

the connecting part is provided with movable grooves on two sides in the third direction, and the movable grooves extend towards the second shell to penetrate through the connecting piece.

10. The battery pack of claim 8, wherein the battery pack comprises a plurality of battery cells,

the first connection structure further includes:

a connecting member connected to the first housing, the retaining member connected to the connecting member, wherein the connecting member and the first housing are spaced apart from each other in the second direction to form a relief area;

the second slave control circuit board comprises:

the second circuit board main body is connected with the second shell; and

the second connector is arranged on the second circuit board main body, and the avoidance area exposes the second connector.