Battery management module and battery pack

Abstract

The utility model provides a battery management module and battery pack, the battery management module includes first shell, second shell and circuit board, second shell and first shell are detachably connected and enclose and form the accommodation cavity that is used for accommodating circuit board, the circuit board is plugged with a plurality of connectors, a plurality of connecting holes for exposing the plurality of connectors are formed in the first shell and / or the second shell, the direction, extending away from the circuit board, of the axial direction of each connecting hole is a first vector, the direction, extending away from the circuit board, of each connecting hole is a second vector, the included angle between the first vector and the second vector is alpha, and alpha is larger than or equal to 0 degree and smaller than or equal to 90 degrees; the enclosing direction of the first shell and the second shell is a first direction, the included angle between the first direction and the bottom of the battery pack is beta, and 0 degree < = beta < lt >; and 90 degrees. According to the battery management module and the battery pack provided by the utility model, condensation generated in the battery pack cannot enter the inner cavity of the connector, so that normal and stable work of the connector can be ensured, and the service life of the battery management module is further prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and more specifically, to a battery management module and a battery pack. Background Art

[0002] At present, there are various forms of battery management systems (BMS) shells. Most BMS are fixed in the battery pack in a horizontal manner, but the horizontal BMS takes up a lot of space. Therefore, due to the space limitation of the battery pack, the horizontal BMS is fixed sideways / vertically. At this time, the opening of the BMS connector cavity faces upward, and condensation is easy to appear in the battery pack. The condensation will enter the BMS connector cavity under the action of gravity, resulting in poor connector contact, connector failure and other risks, shortening the service life of the battery management system. Utility Model Content

[0003] The purpose of the embodiments of the utility model is to provide a battery management module and a battery pack to solve the technical problem in the prior art that condensation in the battery pack may enter the inner cavity of the BMS connector and cause risks such as poor contact and connector failure.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a battery management module, including:

[0005] a first shell;

[0006] a second shell, detachably connected to the first shell, the first shell and the second shell enclosing to form a receiving cavity; and

[0007] A circuit board is accommodated in the accommodating cavity;

[0008] Wherein, a plurality of connectors are plugged into the circuit board, a plurality of connection holes for exposing the plurality of connectors are provided on the first shell and / or the second shell, the direction in which the axial direction of the connection hole extends away from the circuit board is a first vector, the vertically downward direction is a second vector, the angle between the first vector and the second vector is α, then 0°≦α≦90°;

[0009] The enclosing direction of the first shell and the second shell is a first direction, and the angle between the first direction and the bottom of the battery pack is β, then 0°≦β<90°.

[0010] Optionally, the second shell has the accommodating cavity therein, the first shell is detachably connected to the opening of the accommodating cavity, and the first shell is parallel to the second shell.

[0011] Optionally, the connecting hole is formed on a side of the second shell away from the first shell.

[0012] Optionally, the connecting hole is provided on the side where the second shell and the first shell are connected; and / or

[0013] The bottom surface of the second shell is provided with the connecting hole.

[0014] Optionally, the first direction is parallel to the axial direction of the connecting hole.

[0015] Optionally, the first direction is perpendicular to the axial direction of the connecting hole.

[0016] Optionally, mounting portions are respectively provided at two ends of the second shell along the second direction, and the mounting portions are used to install the battery management module in the battery pack.

[0017] Optionally, the mounting portion is located at 1 / 4-3 / 4 of the second shell in the third direction.

[0018] Optionally, a mounting hole is defined in the mounting portion, and the mounting hole penetrates the mounting portion along a third direction.

[0019] Optionally, reinforcing ribs are respectively provided at two ends of the mounting portion along the third direction.

[0020] Optionally, the second shell is provided with a first protrusion along the periphery of the accommodating cavity, and the first shell is provided with a first groove matching with the first protrusion along its periphery.

[0021] Optionally, a protective strip is provided along a fourth direction on the surface of the second shell on which the connecting hole is opened, and the protective strip extends in a direction away from the second shell and is used to cooperate with the connector.

[0022] Optionally, the first shell and the second shell are both plastic parts.

[0023] The utility model also provides a battery pack, which includes the battery management module as described above.

[0024] The beneficial effect of the battery management module provided by the utility model is that: compared with the prior art, the battery management module of the utility model is provided with multiple connection holes for exposing multiple connectors on the circuit board on the first shell and / or the second shell, wherein the axial direction of the connection hole extending away from the circuit board is assumed to be the first vector, the vertical downward direction is assumed to be the second vector, the angle between the first vector and the second vector is α, then 0°≦α≦90°, at this time, the connection hole is horizontal or tilted downward outward, that is, the opening of the connector cavity is horizontal or tilted downward outward, at this time, the condensation generated in the battery pack will fall down along the surface of the first shell or the second shell under the action of gravity, and will not enter the inner cavity of the connector, which can ensure the normal and steady operation of the connector, thereby improving the service life of the battery management module; in addition, the enclosing direction of the first shell and the second shell is set to be the first direction, and the angle between the first direction and the bottom of the battery pack is β, then 0°≦β<90°, that is, the battery management module is fixed vertically or tilted, which is convenient for the installation of the battery management module, and also convenient for the plugging and unplugging of the connector, and can also save installation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 A schematic diagram of a three-dimensional structure after the first shell and the second shell are assembled according to an embodiment of the utility model;

[0027] Figure 2 A schematic diagram of the structure of the first shell and the second shell provided in an embodiment of the utility model;

[0028] Figure 3 A schematic diagram of the three-dimensional structure of the first shell provided in an embodiment of the utility model;

[0029] Figure 4 A schematic diagram of the main structure of the first housing provided in an embodiment of the utility model;

[0030] Figure 5 A schematic diagram of the three-dimensional structure of the second housing provided in an embodiment of the utility model;

[0031] Figure 6 A schematic diagram of the main structure of the second housing provided in an embodiment of the utility model;

[0032] Figure 7 A schematic diagram of the three-dimensional structure of a battery management module provided in an embodiment of the utility model;

[0033] Figure 8 A schematic diagram of the exploded structure of a battery management module provided in an embodiment of the utility model.

[0034] Among them, the reference numerals in the figure are:

[0035] 100, battery management module; 11, first shell; 111, first groove; 112, second protrusion; 113, countersunk hole; 12, second shell; 121, connecting hole; 122, mounting portion; 123, mounting hole; 124, reinforcing rib; 125, first protrusion; 126, protective strip; 13, circuit board; 131, connector; 132, through hole; 14, screw; X, first direction; Y, second direction; Z, third direction; OP1, first vector; OP2, first vector. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0038] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] Please also read Figure 1 , Figure 7 and Figure 8, the battery management module 100 provided by the embodiment of the utility model is now described. The battery management module 100 includes a first shell 11, a second shell 12 and a circuit board 13. The first shell 11 and the second shell 12 are detachably connected to each other to facilitate the disassembly and assembly of the battery management module 100; the first shell 11 and the second shell 12 are enclosed to form a receiving cavity, and the circuit board 13 is received in the receiving cavity, that is, the circuit board 13 is arranged between the first shell 11 and the second shell 12.

[0041] A plurality of connectors 131 are plugged into the circuit board 13, and the plurality of connectors 131 are electrically connected to the circuit board 13, respectively. A plurality of connection holes 121 are provided on the first shell 11 and / or the second shell 12, and the plurality of connection holes 121 are used to expose the plurality of connectors 131, wherein the number of connectors 131 is consistent with the number of connection holes 121 and they correspond one to one, and the connectors 131 are exposed through the connection holes 121 to facilitate the plugging of external connectors. In a specific implementation, a plurality of connection holes 121 may be provided on the first shell 11, a plurality of connection holes 121 may be provided on the second shell 12, or a plurality of connection holes 121 may be provided on both the first shell 11 and the second shell 12.

[0042] in, Figure 1 The first direction X is the width direction of the battery management module 100; the second direction Y is the length direction of the battery management module 100; the third direction Z is the height direction of the battery management module 100; the first vector is OP1; and the second vector is OP2. It can be understood that the first direction X is also the width direction of the first shell 11 and the second shell 12; the second direction Y is also the length direction of the first shell 11 and the second shell 12; the third direction Z is also the height direction of the first shell 11 and the second shell 12; the first vector OP1 and the second vector OP2 in this embodiment mainly use the direction of the three elements of the vector, and do not limit the starting point and size of the vector.

[0043] In this embodiment, the axial direction of the connection hole 121 extending away from the circuit board 13 is the first vector OP1, the vertically downward direction is the second vector OP2, and the angle between the first vector OP1 and the second vector OP2 is α, then 0°≦α≦90°. In a specific implementation, α can be 0°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80° or 90°, etc.

[0044] In this embodiment, the enclosing direction of the first shell 11 and the second shell 12 is the first direction X, and the angle between the first direction X and the bottom of the battery pack is β, then 0°≦β<90°, that is, the battery management module 100 is installed vertically or tilted. In a specific implementation, β can be 0°, 10°, 20°, 30°, 40°, 50°, 60°, 70° or 80°, etc. The battery management module 100 of the embodiment of the utility model adopts a vertical or tilted structure, which occupies less space than the traditional horizontal structure, can save the layout space inside the battery pack assembly, and thus improve the energy density of the battery pack.

[0045] In a specific application, the first shell 11 and the second shell 12 can be detachably connected by screws 14 or snap connections. Four connection holes 121, J1, J2, J3 and J4, are provided on the second shell 12, and the four connection holes 121 are arranged in a straight line.

[0046] Compared with the prior art, the battery management module 100 provided in the embodiment of the utility model is provided with a plurality of connection holes 121 for exposing a plurality of connectors 131 on the circuit board 13 on the first shell 11 and / or the second shell 12, wherein the axial direction of the connection hole 121 extending away from the circuit board 13 is assumed to be the first vector OP1, the vertically downward direction is assumed to be the second vector OP2, and the angle between the first vector OP1 and the second vector OP2 is α, then 0°≦α≦90°, at this time, the connection hole 121 is horizontal or tilted downward outward, that is, the opening of the inner cavity of the connector 131 is horizontal or tilted downward outward, at this time The condensation generated in the battery pack will fall down along the surface of the first shell 11 or the second shell 12 where the connecting hole 121 is opened under the action of gravity, and will not enter the inner cavity of the connector 131, which can ensure the normal and stable operation of the connector 131, thereby improving the service life of the battery management module 100; in addition, the enclosing direction of the first shell 11 and the second shell 12 is set to the first direction X, and the angle between the first direction X and the bottom of the battery pack is β, then 0°≦β<90°, that is, the battery management module 100 is fixed vertically or tilted, which is convenient for the installation of the battery management module 100, and also convenient for the plugging and unplugging of the connector 131, and can also save installation space.

[0047] In one embodiment of the present invention, please refer to Figure 1 and Figure 2, the second shell 12 has the above-mentioned accommodating cavity, and the first shell 11 is detachably connected to the opening of the accommodating cavity. At this time, the first shell 11 and the second shell 12 are arranged in parallel, and the circuit board 13 is also arranged in parallel between the first shell 11 and the second shell 12. In this embodiment, the first shell 11 is roughly plate-shaped, and the second shell 12 is roughly drawer-shaped, which includes a bottom and a side portion arranged around the bottom. The bottom and the side portion enclose a accommodating cavity with an opening. The circuit board 13 is installed in the accommodating cavity and is arranged in parallel with the bottom of the second shell 12. Such an arrangement is convenient for installing the circuit board 13 on the one hand, and makes the overall structure of the battery management module 100 more compact on the other hand.

[0048] In specific applications, please refer to Figure 4 , Figure 7 and Figure 8 The first housing 11, the circuit board 13 and the second housing 12 are connected together by screws 14. A plurality of countersunk holes 113 are provided on the side of the first housing 11 away from the circuit board 13, and a plurality of through holes 132 are provided on the circuit board 13 along its thickness direction. The through holes 132 correspond to the countersunk holes 113 one by one and match each other. The rod of the screw 14 passes through the countersunk holes 113 in sequence and is connected to the side of the second housing 12 close to the circuit board 13 after passing through. In this way, the detachable connection between the first housing 11 and the second housing 12 can be realized. The number and position distribution of the countersunk holes 113 and the through holes 132 can be reasonably selected according to the sizes of the first housing 11 and the second housing 12.

[0049] It can be understood that in other embodiments of the present invention, the first shell 11 and the second shell 12 can both be roughly drawer-shaped structures, and the first shell 11 and the second shell 12 enclose the above-mentioned accommodating cavity for installing the circuit board 13. At this time, the circuit board 13 can be installed in the first shell 11, or in the second shell 12, or at the junction of the first shell 11 and the second shell 12.

[0050] In one embodiment of the present invention, please refer to Figure 1 , Figure 2 and Figures 5 to 8 A connecting hole 121 is provided on the side of the second shell 12 away from the first shell 11, that is, the connecting hole 121 is provided at the drawer-shaped bottom of the second shell 12, and the connecting hole 121 is located at the top of the second shell 12. At this time, condensation in the battery pack will not enter the inner cavity of the connector 131, and the connector 131 is easy to plug in and out.

[0051] Preferably, the first direction X is parallel to the axial direction of the connecting hole 121 to facilitate the plugging of the connector 131 .

[0052] In another embodiment of the utility model, a connection hole 121 is provided on the side where the second housing 12 and the first housing 11 meet, that is, the connection hole 121 is provided on two opposite sides of the drawer-shaped second housing 12, and the condensation in the battery pack will not enter the inner cavity of the connector 131. Preferably, the first direction X is perpendicular to the axial direction of the connection hole 121 to facilitate the insertion of the connector 131.

[0053] In another embodiment of the utility model, a connection hole 121 is provided on the bottom surface of the second housing 12, that is, the connection hole 121 is provided on the drawer-shaped bottom surface of the second housing 12, and condensation in the battery pack will not enter the inner cavity of the connector 131. Preferably, the first direction X is perpendicular to the axial direction of the connection hole 121 to facilitate the insertion of the connector 131.

[0054] In another embodiment of the utility model, a connection hole 121 is provided on the side where the second shell 12 is connected to the first shell 11, and a connection hole 121 is provided on the bottom surface of the second shell 12, so that condensation in the battery pack will not enter the inner cavity of the connector 131. Preferably, the first direction X is perpendicular to the axial direction of the connection hole 121 to facilitate the insertion of the connector 131.

[0055] In one embodiment of the present invention, please refer to Figures 2 to 5 In order to better assemble the first shell 11 and the second shell 12, a first protrusion 125 is provided on the periphery of the accommodating cavity of the second shell 12, and a first groove 111 is provided on the periphery of the first shell 11. The first groove 111 cooperates with the first protrusion 125 to facilitate positioning of the first shell 11 and the second shell 12 during assembly. Figure 6 , wherein the L direction is the length direction of the second shell 12 , and the H direction is the height direction of the second shell 12 . The second shell 12 is provided with first protrusions 125 at opposite ends along its height direction, and correspondingly, first grooves 111 are provided at opposite ends of the first shell 11 .

[0056] Furthermore, in one embodiment of the present invention, in order to facilitate the side insertion of the connector 131, a second groove J5 is provided on the side of the second housing 12. In this embodiment, a second protrusion 112 is provided at a position where the first housing 11 cooperates with the second groove, and during assembly, the second protrusion 112 abuts the connector 131 against the second groove.

[0057] At present, there are many fixed installation points on the BMS shell, and most of them have 4 fixed installation points. The assembly time is long and the cost is also high (the assembly cost, the matching bracket for fixing the BMS or other types of structural parts are complicated and the cost increases accordingly), and it also limits the layout space inside the battery pack assembly.

[0058] In one embodiment of the present invention, please refer to Figure 1 , Figure 2 and Figures 5 to 7 , the second housing 12 is provided with mounting portions 122 at both ends along the second direction Y, and the mounting portions 122 are used to install the battery management module 100 in the battery pack. In this embodiment, the second direction Y is the length direction of the second housing 12, and by providing the mounting portions 122 at both ends along the length direction of the second housing 12, that is, the battery management module 100 has two fixed mounting points, which can save the man-hours of bolts to fix the BMS finished product to the battery pack compared to the traditional BMS, reduce costs, and also save the layout space inside the battery pack assembly.

[0059] In one embodiment of the present invention, please refer to Figure 1 , Figure 2 , Figure 5 and Figure 7 The mounting portion 122 has a mounting hole 123 therein, and the mounting hole 123 penetrates the mounting portion 122 along the third direction Z. In this embodiment, the third direction Z is the height direction of the second housing 12, and the battery management module 100 can be fixed in the battery pack by screws and the mounting hole 123. The mounting hole 123 is a circular hole, and its central axis is perpendicular to the horizontal plane, which makes it easy to install the battery management module 100 at any position in the battery pack.

[0060] In another embodiment of the utility model, the mounting portion 122 has a mounting hole 123 therein, and the mounting hole 123 penetrates the mounting portion 122 along a first direction X, and the first direction X is the width direction of the second shell 12. At this time, the central axis of the mounting hole 123 is horizontally arranged, and the battery management module 100 can be installed at the side of the battery pack.

[0061] In one embodiment of the present invention, please refer to Figure 1 , Figure 2 , Figure 5 and Figure 7 In order to increase the installation strength of the mounting portion 122, reinforcing ribs 124 are respectively provided at both ends of the mounting portion 122 along the third direction Z. The reinforcing ribs 124 are roughly triangular in shape and extend from the end surface of the mounting portion 122 along the third direction Z to the side surface of the second housing 12. The third direction Z is the height direction of the second housing 12.

[0062] In one embodiment of the present invention, please refer to Figure 6, the position of the mounting portion 122 in the third direction Z is located at 1 / 4-3 / 4 of the second shell 12, and the distance between the mounting portion 122 and the horizontal plane is 1 / 4-3 / 4 of the height of the second shell 12. In this embodiment, the third direction Z is the height direction of the second shell 12, and the external fixed mounting point of the battery management module 100 is located in the middle of the battery management module 100, which ensures that the center of gravity of the BMS finished product is stable and there will be no yaw problems, which can effectively ensure the reliability of the BMS. In specific applications, the mounting portion 122 can be located at 1 / 4, 1 / 2 or 3 / 4 of the second shell 12 in the height direction of the second shell 12.

[0063] In one embodiment of the present invention, please refer to Figure 1 , Figure 2 and Figures 5 to 7 A protective strip 126 is provided along a fourth direction on the surface of the second housing 12 where the connection hole 121 is provided. The protective strip 126 extends in a direction away from the second housing 12 and is used to cooperate with the connector 131. In this embodiment, the fourth direction refers to the circumference direction of the opening of the connection hole 121. The protective strips 126 are provided at intervals on both sides of the opening of the connection hole 121 to protect the connector 131.

[0064] In one embodiment of the present invention, please refer to Figures 4 to 6 The first shell 11 and the second shell 12 are both plastic parts, so that the battery management module 100 is light in overall weight and more lightweight. Specifically, the first shell 11 is made of plastic injection molding, and the second shell 12 is also made of plastic injection molding.

[0065] In one embodiment of the utility model, the battery management module 100 further includes a screw 14, which is used to assemble the first housing 11, the second housing 12 and the circuit board 13. Specifically, the assembly sequence of the finished battery management module 100 is as follows: first, the circuit board 13 is placed on the first housing 11; second, the second housing 12 is placed on the first housing 11 with the circuit board 13; third, the screw 14 is tightened, and the rod of the screw 14 passes through the first housing 11 and the circuit board 13 respectively and is connected to the second housing 12, thereby completing the assembly of the finished battery management module 100.

[0066] The battery management module 100 provided by the embodiment of the utility model: the shell of the battery management module 100 is novel, which is significantly different from the conventional horizontal and vertical forms, and can effectively avoid condensation to ensure the normal and stable operation of the connector 131; the overall weight of the shell of the battery management module 100 is light and more lightweight; the shell of the battery management module 100 is simple and convenient to assemble.

[0067] The present utility model also provides a battery pack, which includes the battery management module 100 as described above. The battery pack of this embodiment adopts the battery management module 100, which can save the overall layout space of the battery pack and increase the service life of the battery pack. It should be noted that the battery pack of this embodiment also includes other existing structures, which will not be described in detail here.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery management module, characterized in that: include: a first shell; A second shell is detachably connected to the first shell, and the first shell and the second shell are enclosed to form a receiving cavity; as well as A circuit board is accommodated in the accommodating cavity; Wherein, a plurality of connectors are plugged into the circuit board, a plurality of connection holes for exposing the plurality of connectors are provided on the first shell and / or the second shell, the direction in which the axial direction of the connection hole extends away from the circuit board is a first vector, the vertically downward direction is a second vector, the angle between the first vector and the second vector is α, then 0°≦α≦90°; The enclosing direction of the first shell and the second shell is a first direction, and the angle between the first direction and the bottom of the battery pack is β, then 0°≦β<90°.

2. The battery management module according to claim 1, characterized in that: The second shell has the accommodating cavity therein, the first shell is detachably connected to the opening of the accommodating cavity, and the first shell is parallel to the second shell.

3. The battery management module according to claim 2, characterized in that: The connecting hole is formed on a side of the second shell away from the first shell.

4. The battery management module according to claim 2, characterized in that: The connecting hole is provided on the side where the second shell and the first shell are connected; and / or The bottom surface of the second shell is provided with the connecting hole.

5. The battery management module according to claim 3, characterized in that: The first direction is parallel to the axial direction of the connecting hole.

6. The battery management module according to claim 4, characterized in that: The first direction is perpendicular to the axial direction of the connecting hole.

7. The battery management module according to any one of claims 2 to 6, characterized in that: The second shell is provided with mounting parts at both ends along the second direction, and the mounting parts are used to install the battery management module in the battery pack.

8. The battery management module according to claim 7, characterized in that: The mounting portion is located at 1 / 4-3 / 4 of the second shell in the third direction.

9. The battery management module according to claim 7, characterized in that: The mounting portion has a mounting hole therein, and the mounting hole penetrates the mounting portion along a third direction.

10. The battery management module according to claim 7, characterized in that: The two ends of the mounting portion along the third direction are respectively provided with reinforcing ribs.

11. The battery management module according to any one of claims 2 to 6, characterized in that: The second shell is provided with a first protrusion along the periphery of the accommodating cavity, and the first shell is provided with a first groove matched with the first protrusion along its periphery.

12. The battery management module according to any one of claims 2 to 6, characterized in that: A protection strip is disposed along a fourth direction on the surface of the second shell where the connection hole is opened. The protection strip extends in a direction away from the second shell and is used to cooperate with the connector.

13. The battery management module according to any one of claims 1 to 6, characterized in that: The first shell and the second shell are both plastic parts.

14. A battery pack, characterized in that: Comprising a battery management module as claimed in any one of claims 1 to 13.

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