CN220914320U - Battery management system for battery pack - Google Patents

Abstract

The utility model discloses a battery management system for a battery pack, and relates to the technical field of power batteries. The battery management system comprises a lower shell, a first slave plate, a second slave plate, a main plate and an upper shell, wherein the first slave plate is arranged in the lower shell, a first connector on the first slave plate is arranged upwards, the second slave plate is arranged above the first slave plate, a second connector on the second slave plate is arranged downwards, the main plate is arranged above the second slave plate, a third connector on the main plate is arranged upwards, the upper shell is arranged above the main plate, and the upper shell is connected with the lower shell. According to the battery management system, the first slave board, the second slave board and the main board are sequentially stacked, and the first connector on the first slave board and the second connector on the second slave board are arranged opposite to each other, so that the volume of the circuit board is effectively reduced, the cost of the shell plastic of the battery management system is saved, the installation process is simplified, and the service life of the battery management system is prolonged.

Description

Battery management system for battery pack

Technical Field

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

Background

With the development of the times, new energy automobiles are rapidly developed and policy supported in recent years due to the advantage of environmental friendliness. As a core of the new energy automobile power management system, the Battery Management System (BMS) needs to have efficient development conditions so as to meet the adaptation and iteration of various new energy automobile types, and simultaneously guarantee safety and performance.

The current battery pack and the whole vehicle pursue the maximization of space utilization, the optimal mass density, the arrangement space reserved for the BMS is limited, and the current BMS hardware main stream scheme has 2 kinds.

Master-slave type: the structure of the 'one master and two slave' is that one plastic shell is packed for one main board and two slave boards, and the three boards and the external plastic shells are stacked after packing is completed.

Integrated form: the structure of the main board and the secondary board is contained on one board, the plastic shell of the structure board has high cost due to large area, and the problem of large space arrangement is faced in the process of placing the battery pack in the installation process, so that resources are wasted.

Disclosure of utility model

The utility model aims to solve at least one of the technical problems in the related art to a certain extent, and can reduce the volume of the BMS without affecting the quality of the battery pack.

To this end, an embodiment of the present utility model proposes a battery management system for a battery pack.

A battery management system according to an embodiment of the present utility model includes: a lower case; a first slave board disposed within the lower case, the first connectors on the first slave board being disposed upward; a second slave board disposed above the first slave board, the second connectors on the second slave board being disposed downward; the main board is arranged above the second slave board, and a third connector on the main board is upwards arranged; and the upper shell is arranged above the main board and is connected with the lower shell.

According to the battery management system provided by the embodiment of the utility model, the first slave board, the second slave board and the main board are sequentially stacked, and the first connector on the first slave board and the second connector on the second slave board are arranged opposite to each other, so that the volume of the circuit board is effectively reduced, the cost of the shell plastic of the battery management system is saved, the installation process is simplified, and the service life of the battery management system is prolonged.

In some embodiments, a fastening part is arranged on the upper shell, a fastening interface is arranged on the lower shell, and the fastening part is suitable for being fastened in the fastening interface.

In some embodiments, the fastening parts and the fastening interfaces are all multiple, the fastening parts are arranged at intervals along the circumferential direction of the upper shell, the fastening interfaces are arranged at intervals along the circumferential direction of the lower shell, and the fastening parts and the fastening interfaces are arranged in a one-to-one correspondence.

In some embodiments, a first hole post is provided on the inner side of the upper case, and a first hole is provided on the main board, through which a first fixing member passes to fix the main board on the first hole post.

In some embodiments, a second hole post is provided on the inner side of the lower case, and second holes are provided on the first and second slave plates, through which second holes the first and second slave plates are fixed to the second hole post by second fixing members.

In some embodiments, the battery management system further comprises a rubber pad disposed between the first slave board and the second slave board.

In some embodiments, the number of the second hole columns is the same as that of the rubber pads, and the rubber pads are sleeved on the second hole columns in a one-to-one correspondence manner.

In some embodiments, the battery management system further includes a spacer disposed on top of the second hole post to secure the first slave plate, the second slave plate, and the master plate.

In some embodiments, the upper shell and the lower shell are both injection molded.

In some embodiments, the battery management system further includes a plurality of heat dissipation copper foil layers, and the plurality of heat dissipation copper foil layers are disposed in the heat dissipation areas of the first slave board, the second slave board, and the main board, respectively.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. Other features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.

Drawings

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

Fig. 1 is an exploded view of a battery management system according to an embodiment of the present utility model.

Fig. 2 is a schematic diagram of an upper case and a main board of the battery management system shown in fig. 1.

Fig. 3 is a schematic view of the upper and lower cases of the battery management system shown in fig. 1.

Fig. 4 is a schematic diagram of a first slave board and a master board of the battery management system shown in fig. 1.

Fig. 5 is a schematic diagram of a first slave board, a second slave board, and a master board of the battery management system shown in fig. 1.

Reference numerals:

the battery management system 100, the lower case 10, the card interface 11, the second hole post 12, the first slave board 20, the first connector 21, the second hole 22, the second slave board 30, the second connector 31, the main board 40, the third connector 41, the first hole 42, the upper case 50, the snap-in portion 51, the first hole post 52, the rubber pad 60.

Detailed Description

The technical solutions of the present utility model will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are 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 be within the scope of the utility model.

In order to reduce the cost and resources of the shell and ensure the safety and performance, the battery pack and the whole vehicle pursue the space utilization rate to be maximized. The application designs a novel horizontal stacked BMS hardware structure, which has small volume, saves the cost of the shell plastic of the structure, simplifies the installation process and prolongs the service life of the structure. The scheme can save cost in terms of structure and installation flow and improve production beat.

As shown in fig. 1 to 5, the battery management system 100 according to the embodiment of the present utility model includes a lower case 10, a first slave board 20, a second slave board 30, a master board 40, and an upper case 50.

The first slave board 20 is disposed in the lower case 10, and the first connectors 21 on the first slave board 20 are disposed upward. The second slave board 30 is disposed above the first slave board 20, the second connector 31 on the second slave board 30 is disposed downward, the main board 40 is disposed above the second slave board 30, the third connector 41 on the main board 40 is disposed upward, the upper case 50 is disposed above the main board 40, and the upper case 50 is connected to the lower case 10.

According to the battery management system 100 of the embodiment of the utility model, the first slave board 20, the second slave board 30 and the main board 40 are sequentially stacked, and the first connector 21 on the first slave board 20 and the second connector 31 on the second slave board 30 are arranged opposite to each other, so that the volume of a circuit board is effectively reduced, the cost of the plastic shell of the battery management system 100 is saved, the installation process is simplified, and the service life of the battery management system is prolonged.

In some embodiments, as shown in fig. 1-5, the upper shell 50 is provided with a fastening portion 51, the lower shell 10 is provided with a card interface 11, and the fastening portion 51 is adapted to be fastened in the card interface 11.

It can be understood that the upper shell 50 is an injection molding piece, the upper shell 50 can satisfy mechanical stress, and has light weight and low cost, and the periphery of the upper shell 50 is designed with the fastening portion 51, and the fastening portion 51 is an elastic structure.

The lower shell 10 is provided with the clamping port 11, the clamping port 11 is a quadrilateral opening, and when the upper shell 50 is connected with the lower shell 10, the clamping part 51 can be clamped in the clamping port 11 under the elastic action, so that the stability between the upper shell 50 and the lower shell 10 is improved.

In some embodiments, as shown in fig. 1 to 5, the number of the fastening portions 51 and the number of the card interfaces 11 are plural, the plural fastening portions 51 are disposed at intervals along the circumferential direction of the upper case 50, the plural card interfaces 11 are disposed at intervals along the circumferential direction of the lower case 10, and the plural fastening portions 51 and the plural card interfaces 11 are disposed in one-to-one correspondence.

It will be appreciated that the number of the snap-fit portions 51 and the snap-fit interfaces 11 is plural, thereby facilitating an improved stability between the upper case 50 and the lower case 10.

Further, the plurality of fastening portions 51 are disposed at intervals along the circumferential direction of the upper case 50, and the plurality of fastening ports 11 are disposed at intervals along the circumferential direction of the lower case 10, so that the stress between the upper case 50 and the lower case 10 is more uniform.

In some embodiments, as shown in fig. 1-5, the inner side of the upper case 50 is provided with a first hole post 52, and the main board 40 is provided with a first hole 42, and a first fixing member (not shown) passes through the first hole 42 to fix the main board 40 to the first hole post 52.

It will be appreciated that the first hole post 52 is provided inside the upper case 50, and that the axis of the first hole post 52 is perpendicular to the top of the upper case 50. The first fixing member may be a screw, and a screw hole may be formed in the first hole pillar 52, and the screw may be screwed into the first hole pillar 52. Thereby, the stability between the main board 40 and the upper case 50 is advantageously improved.

Further, the first hole columns 52 have a certain height, and the first hole columns 52 can separate the upper shell 50 from the main board 40, thereby being beneficial to improving the heat dissipation effect of the main board 40.

In some embodiments, as shown in fig. 1 to 5, the lower case 10 is provided at an inner side thereof with a second hole post 12, and the first and second slave plates 20 and 30 are provided at second holes 22, through which second holes 22 are passed by second fixing members (not shown) to fix the first and second slave plates 20 and 30 to the second hole post 12.

It will be appreciated that the second hole post 12 is provided on the inside of the lower case 10, and that the axis of the second hole post 12 is perpendicular to the bottom of the lower case 10. The second fixing member may be a screw, and a threaded hole is formed in the second hole pillar 12, and the screw may be screwed into the second hole pillar 12. Thereby, it is advantageous to improve stability between the first and second slave plates 20 and 30 and the lower case 10.

Further, the second hole pillars 12 themselves have a certain height, and the second hole pillars 12 may separate the lower case 10 from the first slave plate 20, thereby facilitating an improvement in heat dissipation effect of the first slave plate 20.

In some embodiments, as shown in fig. 1-5, the battery management system 100 further includes a rubber pad 60, the rubber pad 60 being disposed between the first slave board 20 and the second slave board 30.

It is understood that the rubber pad 60 is made of an insulating rubber material, and the BMS of the 400V platform is made of an insulating rubber material with a withstand voltage of 2500V or more. The 800V platform BMS is made of insulating rubber materials with withstand voltage of more than 3000V. Rubber pads 60 are used for the connection of the first slave plate 20 with the second slave plate 30. Rubber pad 60 also serves insulating, shock-resistant and supporting functions.

In some embodiments, as shown in fig. 1-5, the number of the second hole columns 12 is identical to the number of the rubber pads 60, and the rubber pads 60 are sleeved on the second hole columns 12 in a one-to-one correspondence.

It will be appreciated that the second hole columns 12 and the rubber pad 60 are plural, thereby further improving the connection, insulation, vibration resistance and support of the rubber pad 60.

In some embodiments, as shown in fig. 1-5, the battery management system 100 further includes a retainer (not shown) disposed on top of the second hole post 12 to secure the first slave plate 20, the second slave plate 30, and the master plate 40.

It will be appreciated that the positioning member is a positioning screw, and the outer periphery of the second hole pillar 12 is provided with external threads, and the positioning member is in threaded connection with the second hole pillar 12, thereby effectively improving the stability of the first slave plate 20, the second slave plate 30 and the master plate 40.

In some embodiments, as shown in fig. 1-5, the upper shell 50 and the lower shell 10 are both injection molded.

It should be noted that, the upper case 50 and the lower case 10 are injection molded parts, and the upper case 50 and the lower case 10 satisfy mechanical stress, and have light weight and low cost.

In some embodiments, as shown in fig. 1-5, the battery management system 100 further includes a plurality of heat dissipation copper foil layers (not shown) disposed in the heat dissipation areas of the first slave board 20, the second slave board 30, and the master board 40, respectively.

In the present application, the first slave board 20 and the second slave board 30 are main heat generating sources, the heat generating areas thereof need to be considered in heat dissipation design, and a large package resistance (for example, a package of 1206 or more) and a heat dissipation copper foil design (the heat dissipation copper foil is calculated based on heat generating power, and calculated according to 150mA of continuous equilibrium, the heat dissipation copper foil on one side of the equilibrium resistance is at least 25mm square or more, and the heat dissipation copper foil is designed on both sides, and adjacent channels are designed alternately.

In the application, in order to increase the heat dissipation effect, the heat dissipation copper foil can be designed on both sides and communicated by the via holes, and the parameters of the via holes can be selected to be 0.4-0.8mm in diameter.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

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

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. 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.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. A battery management system for a battery pack, comprising:

A lower case;

A first slave board disposed within the lower case, the first connectors on the first slave board being disposed upward;

A second slave board disposed above the first slave board, the second connectors on the second slave board being disposed downward;

The main board is arranged above the second slave board, and a third connector on the main board is upwards arranged;

And the upper shell is arranged above the main board and is connected with the lower shell.

2. The battery management system for a battery pack according to claim 1, wherein a snap-fit portion is provided on the upper case, a snap-fit interface is provided on the lower case, and the snap-fit portion is adapted to snap-fit into the snap-fit interface.

3. The battery management system for a battery pack according to claim 2, wherein the plurality of the snap-in portions and the plurality of the card interfaces are each provided in plurality, the plurality of the snap-in portions are provided at intervals in the circumferential direction of the upper case, the plurality of the card interfaces are provided at intervals in the circumferential direction of the lower case, and the plurality of the snap-in portions and the plurality of the card interfaces are arranged in one-to-one correspondence.

4. The battery management system for a battery pack according to claim 1, wherein a first hole post is provided at an inner side of the upper case, a first hole is provided at the main plate, and a first fixing member passes through the first hole to fix the main plate to the first hole post.

5. The battery management system for a battery pack according to claim 1, wherein the inner side of the lower case is provided with a second hole column, and the first slave plate and the second slave plate are provided with second holes through which second fixing members pass to fix the first slave plate and the second slave plate to the second hole column.

6. The battery management system for a battery pack according to claim 5, further comprising:

and the rubber pad is arranged between the first slave plate and the second slave plate.

7. The battery management system for a battery pack according to claim 6, wherein the number of the second hole columns is identical to the number of the rubber pads, and the rubber pads are sleeved on the second hole columns in a one-to-one correspondence.

8. The battery management system for a battery pack according to claim 7, further comprising:

and the positioning piece is arranged at the top of the second hole column so as to fix the first slave plate, the second slave plate and the main plate.

9. The battery management system for a battery pack of claim 1, wherein the upper case and the lower case are both injection molded.

10. The battery management system for a battery pack according to claim 1, further comprising:

the heat dissipation copper foil layers are multiple, and the heat dissipation copper foil layers are respectively arranged in the heat dissipation areas of the first slave plate, the second slave plate and the main plate.