BMS shell and battery pack

Abstract

The utility model belongs to the technical field of batteries, and discloses a BMS (battery management system) shell and a battery pack, the BMS shell comprises an upper shell, a lower shell and a protective sleeve; the upper shell is connected to the lower shell in a buckled mode, and a hollow containing cavity is formed between the upper shell and the lower shell and used for containing a circuit board. The upper shell is provided with a communication port corresponding to the protective sleeve and used for placing the communication end of the circuit board, and the protective sleeve is connected to the communication port of the upper shell in a buckled mode. According to the utility model, the communication port can be prevented from being damaged due to physical impact, abrasion or other mechanical damages through the protective sleeve, so that the durability of the whole shell is improved, moisture, dust and other pollutants are effectively prevented from entering the communication port, circuit faults or short circuits caused by environmental factors are reduced, and the safety and reliability of the whole battery pack are enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a BMS shell and a battery pack. Background Art

[0002] BMS (BATTERY MANAGEMENT SYSTEM) is a system used to manage and monitor lithium-ion batteries or other rechargeable batteries. The BMS shell refers to the outer shell of the BMS system. The function of the BMS shell is to provide external protection for the BMS system and perform packaging, protection, heat dissipation and fastening functions. The BMS system is often used in applications such as electric vehicles, hybrid vehicles, electric bicycles, energy storage systems, etc. Therefore, its shell design needs to meet the requirements of high safety, durability and heat dissipation.

[0003] The existing BMS shell is provided with a communication port for placing the communication end of the circuit board, but the communication port is not protected, so that the communication port is exposed and easily subjected to physical impact or wear, resulting in an unstable or damaged connection between the communication end of the circuit board and the circuit board body, and moisture and dust can enter the internal circuit through the unprotected communication port, causing corrosion, short circuit or other faults, thereby affecting the safety and stability of the entire battery pack. Utility Model Content

[0004] The main purpose of the utility model is to provide a BMS housing and a battery pack, aiming to solve the technical problem that the communication port on the existing BMS housing is not protected and is easily damaged.

[0005] In order to achieve the above-mentioned utility model object, the utility model proposes a BMS housing, including an upper housing, a lower housing and a protective cover;

[0006] The upper shell is snap-connected to the lower shell, and a hollow accommodating chamber is formed between the upper shell and the lower shell for placing a circuit board;

[0007] The upper shell is provided with a communication port corresponding to the protective cover for accommodating the communication end of the circuit board, and the protective cover is snap-connected to the communication port of the upper shell.

[0008] Furthermore, the lower shell includes a first bottom plate and a first frame arranged on the edge of the first bottom plate, and a snap device is arranged on the lower shell, and the snap device includes a plurality of first snaps and a plurality of second snaps arranged on the first frame, and the first snaps are arranged adjacent to the second snaps.

[0009] Furthermore, a groove is formed at a connection between the first buckle and the first frame, and the groove extends toward a direction approaching the first bottom plate.

[0010] Furthermore, a first limiting groove recessed toward the accommodating chamber is provided on the first frame, and the first limiting groove corresponds to the first buckle and extends toward an edge direction away from the first bottom plate.

[0011] Furthermore, a second limiting groove recessed toward the accommodating chamber is further provided on the first frame, and the second limiting groove corresponds to the second buckle and extends toward an edge direction away from the first bottom plate.

[0012] Furthermore, the upper shell includes a second base plate, and a second frame arranged on the edge of the second base plate, and a card slot is arranged on the upper shell, and the card slot includes a plurality of first card slots and a plurality of second card slots arranged on the second frame, the first card slot corresponds to the first buckle, and the second card slot corresponds to the second buckle.

[0013] Furthermore, a voltage collection port located between adjacent second card slots is provided on the second frame, a pressure collection baffle located between adjacent second buckles is provided on the first frame, and the pressure collection baffle corresponds to the voltage collection port.

[0014] Furthermore, the communication port is arranged on the second frame, and the communication port is arranged adjacent to the voltage collection port, and a plurality of locking tongues are arranged on the side wall of the communication port, and a locking groove corresponding to the locking tongue is arranged on the protective cover, and the protective cover is connected to the upper shell body by the locking tongue being clamped in the locking groove.

[0015] Furthermore, a wiring harness notch is provided on the protective cover, and the wiring harness notch is located between adjacent locking grooves.

[0016] Furthermore, a plurality of first reinforcing ribs are provided on the first bottom plate, and the first reinforcing ribs protrude toward the upper shell body by a first specified height.

[0017] Furthermore, a plurality of second reinforcing ribs corresponding to the first reinforcing ribs are arranged on the second bottom plate, and the second reinforcing ribs protrude toward the lower shell body by a second specified height.

[0018] Furthermore, a plurality of positioning devices are provided on the first bottom plate, and the positioning devices include a support column and a positioning column. The support column is provided on the first bottom plate and connected to the first reinforcing rib. The positioning column is provided at one end of the support column away from the first bottom plate.

[0019] Furthermore, a plurality of positioning holes corresponding to the positioning device are provided on the second bottom plate, and the positioning holes are connected to the second reinforcing ribs.

[0020] Furthermore, a connecting portion is provided on the upper shell, and a plurality of threaded holes are provided on the connecting portion.

[0021] The utility model provides a battery pack, comprising any one of the BMS shells described above.

[0022] Beneficial effects:

[0023] A BMS shell of the utility model comprises an upper shell, a lower shell and a protective cover; the upper shell is snap-connected to the lower shell, and a hollow accommodating chamber is formed between the upper shell and the lower shell for placing a circuit board; a communication port corresponding to the protective cover is provided on the upper shell for placing a communication end of the circuit board, and the protective cover is snap-connected to the communication port of the upper shell, so that the protective cover can prevent the communication port from being damaged due to physical impact, wear or other mechanical damage, thereby improving the durability of the entire shell, effectively preventing moisture, dust and other pollutants from entering the communication port, reducing circuit failures or short circuits caused by environmental factors, and enhancing the safety and reliability of the entire battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of a BMS housing according to an embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the overall structure of the lower shell of an embodiment of the utility model;

[0026] Figure 3 For an embodiment of the utility model Figure 2 A local schematic diagram of the A;

[0027] Figure 4 For an embodiment of the utility model Figure 2 A partial schematic diagram of point B;

[0028] Figure 5 This is a schematic diagram of the overall structure of the upper shell of another embodiment of the utility model;

[0029] Figure 6 Another embodiment of the utility model Figure 5 A partial schematic diagram of point C;

[0030] Figure 7 Another embodiment of the present invention Figure 5 A local schematic diagram of point D;

[0031] Figure 8 Another embodiment of the present invention Figure 5 Top view of the .

[0032] in:

[0033] 1. Upper shell; 2. Lower shell; 3. Protective cover; 4. Buckle device; 6. Lock tongue; 7. Lock slot; 8. Wire harness notch; 9. Lock strip;

[0034] 10. Second bottom plate; 11. Second frame; 12. Second long frame; 13. Second short frame; 14. Second reinforcing rib; 15. Positioning hole; 16. Connecting part; 17. Threaded hole; 18. Voltage collection port; 19. Communication port;

[0035] 160, first connecting portion; 161, second connecting portion; 162, connecting plate;

[0036] 20. First bottom plate; 21. First frame; 22. First long frame; 23. First short frame; 24. Pressure baffle; 25. First reinforcing rib; 26. Positioning device;

[0037] 260, support column; 261, positioning column;

[0038] 40. first buckle; 41. second buckle; 42. second inclined surface; 43. second limiting groove;

[0039] 401, buckle body; 402, first latch tongue; 403, first inclined surface; 404, groove; 405, first limiting groove;

[0040] 50. First card slot; 51. Second card slot;

[0041] 501, first slide groove; 502, first baffle; 503, first buckle hole;

[0042] 510, second slide groove; 511, second baffle; 512, second snap hole.

[0043] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0044] 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.

[0045] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. 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 "multiple" is two or more, unless otherwise clearly and specifically defined.

[0046] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0047] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0048] Reference Figure 1 , this embodiment provides a BMS housing, including an upper housing 1, a lower housing 2 and a protective cover 3;

[0049] The upper shell 1 is snap-connected to the lower shell 2, and a hollow accommodating chamber is formed between the upper shell 1 and the lower shell 2 for placing a circuit board;

[0050] The upper shell 1 is provided with a communication port 19 corresponding to the protective cover 3 for accommodating the communication end of the circuit board, and the protective cover 3 is snap-connected to the communication port 19 of the upper shell 1 .

[0051] In the above embodiment, the BMS (BATTERY MANAGEMENT SYSTEM) housing includes an upper housing 1 and a lower housing 2, and the upper housing 1 and the lower housing 2 are arranged corresponding to each other, and a hollow accommodating chamber for accommodating a circuit board is formed between the upper housing 1 and the lower housing 2. The circuit board is preferably a PCB circuit board. In addition, the material of the upper housing 1 and the lower housing 2 is preferably PC (Polycarbonate) + ABS (Acrylonitrile Butadiene Styrene) (a mixture of polycarbonate and acrylonitrile-butadiene-styrene copolymer), the density of the PC+ABS mixture is lower than that of some metal materials, which effectively reduces the overall weight of the BMS shell, and the PC+ABS mixture combines the high strength of PC and the high toughness of ABS, providing better impact resistance and wear resistance; the BMS shell also includes a protective cover 3, and a communication port 19 corresponding to the protective cover 3 is provided on the side of the upper shell 1, which is used to place the communication end of the circuit board, so that external equipment (such as computers, test instruments, other battery management system components, etc.) can exchange data with the communication end of the circuit board at the communication port 19, so by snapping the protective cover 3 to the communication port 19 of the upper shell 1, the protective cover can prevent the communication port from being damaged due to physical impact, wear or other mechanical damage, thereby improving the durability of the entire shell, effectively preventing moisture, dust and other contaminants from entering the communication port, reducing circuit failures or short circuits caused by environmental factors, and enhancing the safety and reliability of the entire battery pack.

[0052] Reference Figure 2-Figure 3 In one embodiment, the lower shell 2 includes a first bottom plate 20 and a first frame 21 arranged on the edge of the first bottom plate 20, and a snap device 4 is arranged on the lower shell 2, and the snap device 4 includes a plurality of first snaps 40 and a plurality of second snaps 41 arranged on the first frame 21, and the first snaps 40 are arranged adjacent to the second snaps 41.

[0053] In the above embodiment, the lower shell 2 is preferably rectangular, and the lower shell 2 includes a first bottom plate 20 and a first frame 21, wherein the first frame 21 is arranged on the edge of the entire circumference direction of the first bottom plate 20, and the first frame 21 extends a certain height toward the upper shell 1, so that the first bottom plate 20 and the first frame 21 are surrounded to form a accommodating compartment, and a snap device 4 is provided on the lower shell 2, and the snap device 4 includes a plurality of first snaps 40 and a plurality of second snaps 41, and the plurality of first snaps 40 and the plurality of second snaps 41 are arranged adjacent to each other, wherein the arrangement of the first snaps 40 and the second snaps 41 is preferably: the first snaps 40 are arranged on both sides of the first frame 21 On the first long frame 22 on the opposite sides, the second buckle 41 is arranged on the first short frame 23 on the opposite sides of the first frame 21, so that the first buckle 40 and the second buckle 41 are respectively arranged adjacent to the first long frame 22 and the first short frame 23. In addition, the positions of the first buckle 40 and the second buckle 41 on the first frame 21 can be swapped. Therefore, the buckle device 4 is arranged on the entire periphery of the first frame 21, which provides a more uniform connection force for the connection between the upper shell 1 and the lower shell 2, enhances the structural stability of the entire shell, and when the upper shell 1 and the lower shell 2 are connected by the buckle, the stress can be more evenly distributed around the shell, reducing local stress concentration.

[0054] Reference Figure 2-Figure 3 In one embodiment, the first buckle 40 includes a buckle body 401 and a first latch tongue 402, the buckle body 401 is connected to the first long frame 22, the first latch tongue 402 is arranged on the side of the buckle body 401 away from the first bottom plate 20, and a first inclined surface 403 is arranged on the top surface of the first latch tongue 402, and the vertical height of the first inclined surface 403 gradually decreases from the top to the bottom.

[0055] In the above embodiment, the first buckle 40 includes a buckle body 401 and a first latch 402, wherein the buckle body 401 is connected to the first long frame 22, and the inner and outer side surfaces of the buckle body 401 are respectively in the same plane as the inner and outer side surfaces of the first long frame 22, and the first latch 402 is arranged on the side of the buckle body 401 away from the first bottom plate 20, that is, the first latch 402 is located on the outer side of the buckle body 401 away from the accommodating bin, the first latch 402 is located at the top of the buckle body 401, and the first long frame 22, the buckle body 401 and the first latch 402 are an integrated part, and the first latch 402 extends in a direction away from the buckle body 401, and a first inclined surface 403 is provided on the top surface of the first latch 402, so that the first The vertical height from one end of the inclined surface 403 close to the top surface of the buckle body 401 to the bottom of the first tongue 402 and the vertical height from one end of the first inclined surface 403 away from the top surface of the buckle body 401 to the bottom of the first tongue 402 gradually decrease from top to bottom, and the end surface of the first tongue 402 away from the buckle body 401 is a plane, so that the shape of the first tongue 402 is preferably a right-angle step, ensuring that when the edge of the upper shell 1 contacts the first inclined surface 403 of the first tongue 402 and applies a downward force, the upper shell 1 can use the guidance of the first inclined surface 403 during the insertion process, so as to more easily align the first buckle 40 and enter the slot, effectively reducing the force required for assembly, reducing the difficulty of operation, and improving assembly efficiency.

[0056] Reference Figure 2-Figure 3 In one embodiment, the second buckle 41 is a second latching tongue arranged on the side of the first short frame 23 away from the first bottom plate 20, and a second inclined surface 42 is arranged on the top surface of the second latching tongue, and the vertical height of the second inclined surface 42 gradually decreases from the top to the bottom.

[0057] In the above embodiment, the second clip 41 is a second clip tongue arranged on the side of the first short frame 23 away from the first bottom plate 20, that is, the second clip tongue is located on the outside of the first short frame 23 away from the accommodating compartment, and the second clip tongue is located at the top of the first short frame 23, and the first clip tongue 402 extends in a direction away from the clip body 401, so that the first short frame 23 and the second clip tongue are integrated, and a second inclined surface 42 is arranged on the top surface of the second clip tongue, so that the vertical height from one end of the second inclined surface 42 close to the top surface of the first short frame 23 to the bottom of the second clip tongue is equal to the second inclined surface 42. The vertical height from the end away from the top surface of the first short frame 23 to the bottom of the second tongue gradually decreases from the top to the bottom, and the end surface of the second tongue away from the first short frame 23 is a plane, so that the shape of the second tongue is preferably a right-angle step, ensuring that when the edge of the upper shell 1 contacts the second inclined surface 42 of the second tongue and applies a downward force, the upper shell 1 can use the guidance of the second inclined surface 42 during the insertion process, so that it is easier to align the second buckle 41 and enter the slot, effectively reducing the force required for assembly, reducing the difficulty of operation, and improving assembly efficiency.

[0058] Reference Figure 2-Figure 3 In one embodiment, a groove 404 is formed at a connection between the first buckle 40 and the first frame 21 , and the groove 404 extends toward a direction close to the first bottom plate 20 .

[0059] In the above embodiment, a groove 404 is formed at the connection between the first buckle 40 and the first frame 21, wherein the groove 404 is preferably arranged at the connection between the first buckle 40 and the first long frame 22 on both sides of the first short frame 23, and the two grooves 404 extend to the same depth in the direction close to the first base plate 20, so that the part of the buckle body 401 close to the first short frame 23 is still connected to the first short frame 23, ensuring a firm fixation in this area, and the other part of the buckle body 401 away from the first short frame 23 is in a separated state from the first short frame 23 through the groove 404, so that the buckle body 401 has a certain degree of elasticity and flexibility while being connected to the first short frame 23, reducing assembly stress, and when maintenance or replacement of parts is required, the first tongue 402 on the other part of the buckle body 401 can be relatively easily separated from the card slot of the upper shell 1 through the groove 404, so that the lower shell 2 and the upper shell 1 can be more conveniently disassembled, thereby improving the convenience of assembly and maintenance.

[0060] Reference Figure 2-Figure 3 In one embodiment, a first limiting groove 405 recessed toward the accommodating chamber is provided on the first frame 21 , and the first limiting groove 405 corresponds to the first buckle 41 and extends toward an edge away from the first bottom plate 20 .

[0061] In the above embodiment, a first limiting groove 405 is provided on the first long frame 22 of the first frame 21, and the first limiting groove 405 is located on the buckle body 401 of the first buckle 41, wherein the first limiting groove 405 corresponds to the first latch 402, so that it is located on the same side of the buckle body 401 where the first latch 402 is provided, and the first limiting groove 405 forms an opening at the bottom of the buckle body 401 close to one end of the first bottom plate 20, and the first limiting groove 405 extends toward the first latch 402, so that the first limiting groove 405 contacts the bottom of the first latch 402, and the shape of the first limiting groove 405 is preferably wedge-shaped. When the first latch 402 is engaged in the first buckle hole 503, the first limiting groove 405 is aligned with the first latch 402 provided on the second long frame 12. A limit block is engaged; in addition, a second limit groove 43 is provided on the first short frame 23, wherein the second limit groove 43 corresponds to the second buckle 41, so that it is located on the same side of the first short frame 23 where the second latch is provided, and the second limit groove 43 forms an opening at the bottom of the first short frame 23 close to one end of the first bottom plate 20, and the second limit groove 43 extends in the direction of the second latch, so that the second limit groove 43 contacts the bottom of the second latch, and the shape of the second limit groove 43 is preferably wedge-shaped. When the second latch is engaged in the second buckle hole 512, the second limit groove 43 is engaged with the second limit block set on the second short frame 13. The above-mentioned latching mechanism increases the stability of the latching between the upper shell 1 and the lower shell 2, and prevents accidental disengagement due to vibration or impact.

[0062] Reference Figure 2-Figure 3 , Figure 5-Figure 7 In one embodiment, the upper shell 1 includes a second bottom plate 10, and a second frame 11 arranged on the edge of the second bottom plate 10, and a card slot is arranged on the upper shell 1, and the card slot includes a first card slot 50 and a second card slot 51 arranged on the second frame 11, the first card slot 50 corresponds to the first buckle 40, and the second card slot 51 corresponds to the second buckle 41.

[0063] In the above embodiment, the upper shell 1 is preferably rectangular, and the upper shell 1 includes a second base plate 10 and a second frame 11, wherein the second frame 11 is arranged on the edge of the entire circumference direction of the second base plate 10, and the second frame 11 extends a certain height toward the lower shell 2, so that the second base plate 10 and the second frame 11 are enclosed to form a storage chamber; a card slot is arranged on the upper shell 1, and the card slot includes a plurality of first card slots 50 and a plurality of second card slots 51, wherein the first card slot 50 is arranged on the second long frame 12 on the opposite sides of the second frame 11, and corresponds to the first buckle 40, and the second card slot 51 is arranged on the second short frame 13 on the opposite sides of the second frame 11, and corresponds to the second buckle 41, so that the first card slot 50 and the second card slot 51 are respectively arranged adjacent to the second long frame 12 and the second short frame 13; the first card slot 50 includes a first slide groove 501, and a first slide groove 502, which is arranged on the inner side of the second long frame 12 close to the storage chamber and corresponds to the first buckle 40. A first baffle plate 502 corresponding to a slide slot 501, and the first baffle plate 502 forms a first snap hole 503 at one end of the first slide slot 501 away from the second base plate 10, corresponding to the first latch tongue 402, so that the first latch tongue 402 is snapped into the first snap hole 503; the second latch slot 51 includes a second slide slot 510, and a second baffle plate 511 arranged on the inner side of the second short frame 13 close to the accommodating chamber and corresponding to the second slide slot 510, and the second baffle plate 511 forms a second snap hole 512 at one end of the second slide slot 510 away from the second base plate 10, corresponding to the second latch tongue, so that the second latch tongue is snapped into the second snap hole 512. The design of the first snap hole 503 and the second snap hole 512 respectively provides clear snap positions for the first latch tongue 402 and the second latch tongue, thereby enhancing the reliability of the snap connection, ensuring that the snaps of the upper shell 1 and the lower shell 2 can be accurately matched, and improving the accuracy and stability of the entire shell.

[0064] When installing the BMS shell, the circuit board is installed in the lower shell 2, and then the upper shell 1 is placed above the lower shell 2, the upper shell 1 is aligned with the edge of the lower shell 2 and the snap device 4 and the slot, and a certain downward force is applied to the upper shell 1, the edge of the upper shell 1 slides along the edge of the lower shell 2, so that the snap device 4 is completely embedded in the slot and locked in place, and the upper shell 1 and the lower shell 2 are connected by snap connection, the circuit board is protected in the shell, and then the communication harness is inserted into the communication interface of the circuit board through the communication port 19, wherein the communication structure is preferably CAN communication, and then the protective cover 3 is snap-connected to the communication port 19 of the upper shell 1, so that the communication harness is connected from the U-shaped harness notch 8 at both ends of the protective cover 3, the installation of the entire BMS shell can be completed quickly, the time required for manually tightening the bolts is reduced, thereby speeding up the assembly speed, and at the same time, no tools are required to tighten the bolts during assembly, which reduces the physical labor of workers, improves the efficiency of the production line, and can more easily realize automated assembly, and can be quickly disassembled and reassembled during shell maintenance, which is convenient for maintenance and replacement of internal components, thereby improving maintenance efficiency.

[0065] Reference Figure 2-Figure 3 , Figure 5-Figure 8 In one embodiment, a voltage collection port 18 located between adjacent second card slots 51 is provided on the second frame 11, and a pressure collection baffle 24 located between adjacent second buckles 41 is provided on the first short frame 23, and the pressure collection baffle 24 corresponds to the voltage collection port 18.

[0066] In the above embodiment, a voltage collection port 18 is provided on the second short frames 13 on opposite sides, wherein the voltage collection port 18 is located between adjacent second card slots 51, and the voltage collection port 18 can be divided into a plurality of different areas for voltage collection as needed, and the voltage collection port 18 can preferably be divided into four sub-areas, so that two sub-areas are provided on each of the second short frames 13 on opposite sides, and the four sub-areas provided on the second short frames 13 on opposite sides are symmetrical to each other; a pressure collection baffle 24 is provided on the first short frame 23, wherein the pressure collection baffle 24 is located between adjacent second buckles 41, and the pressure collection baffle 24 corresponds to the voltage collection port 18, and the length of the pressure collection baffle 24 is less than or equal to the length of the voltage collection port 18, so that when the upper shell 1 is clamped on the lower shell 2, the pressure collection baffle 24 is located in the voltage collection port 18, and the design of the voltage collection port 18 and the pressure collection baffle 24 can be more directly and accurately performed voltage collection, thereby improving the efficiency of voltage collection.

[0067] Furthermore, a plurality of first reinforcing ribs 25 are arranged on the first bottom plate 20, and a plurality of second reinforcing ribs 14 corresponding to the first reinforcing ribs 25 are arranged on the second bottom plate 10, wherein the shapes of the first reinforcing ribs 25 and the second reinforcing ribs 14 are preferably regular hexagons, and the first reinforcing ribs 25 and the second reinforcing ribs 14 are arranged in an array on the first bottom plate 20 and the second bottom plate 10, respectively. In addition, the first reinforcing ribs 25 protrude a first specified height toward the upper shell 1, and the second reinforcing ribs 14 protrude a second specified height toward the lower shell 2, so that the first reinforcing ribs 25 and the second reinforcing ribs 14 have a certain height on the first bottom plate 20 and the second bottom plate 10, respectively, so that when the circuit board is placed in the accommodating chamber between the upper shell 1 and the lower shell 2, the circuit board can effectively avoid direct contact between the circuit board and the first bottom plate 20 of the lower shell 2 and the second bottom plate 10 of the upper shell 1 by the specified height of the first reinforcing ribs 25 and the second reinforcing ribs 14, thereby reducing the risk of short circuit or damage caused by contact, and the first reinforcing ribs 25 and the second reinforcing ribs 14 provide additional surface area, which helps to disperse the heat of the circuit board and improve the heat dissipation conditions of the circuit board.

[0068] Reference Figure 1-Figure 3 , Figure 5-Figure 7 In one embodiment, the communication port 19 is arranged on the second frame 11, and the communication port 19 is arranged adjacent to the voltage collection port 18, and a plurality of locking tongues 6 are arranged on the side wall of the communication port 19, and a locking groove 7 corresponding to the locking tongue 6 is provided on the protective cover 3, and the protective cover 3 is connected to the upper shell 1 by being clamped in the locking groove 7 by the locking tongue 6.

[0069] In the above embodiment, the communication port 19 is arranged on the second frame 11, preferably in the middle position of the second long frame 12, so that the communication port 19 is arranged adjacent to the voltage collection port 18. In addition, a plurality of locking tongues 6 are arranged on the two side walls of the communication port 19, and the locking tongues 6 extend on the second long frame 12 in a direction away from the second bottom plate 10 and protrude from the second long frame 12. At the same time, a locking bar 9 is arranged at the top of the communication port 19 and at the connection with the second bottom plate 10, and locking grooves 7 corresponding to the locking tongue 6 are arranged on both sides of the protective cover 3, and a lock buckle corresponding to the locking bar 9 is arranged on the inner side of the top of the protective cover 3, and the locking tongue 6 is snap-connected in the locking groove 7, and the lock buckle is snap-connected to the locking bar 9, so that the protective cover 3 is tightly connected to the upper shell 1, so that the installation and disassembly of the protective cover 3 becomes simple and quick, and it is convenient for maintenance and upgrading.

[0070] Furthermore, a wiring harness notch 8 is provided on both sides of the protective cover 3, and the wiring harness notch 8 is located between adjacent locking grooves 7, and the two opposite wiring harness notches 8 on both sides of the protective cover 3 extend a certain depth in opposite directions, and the shape of the wiring harness notch 8 is preferably U-shaped. The wiring harness notch 8 can be used as a fixing point for the wiring harness, and through the U-shaped clamping effect, the movement and vibration of the cable or wiring harness can be reduced, the stability of the cable or wiring harness can be ensured, the cables or wiring harness can be arranged more conveniently, the arrangement and routing of the cables or wiring harness are simplified, and the protection of the wiring harness is improved.

[0071] Reference Figure 2-Figure 3 , Figure 4-Figure 7 In one embodiment, a plurality of positioning devices 26 are provided on the first bottom plate 20, and the positioning devices 26 include a support column 260 and a positioning column 261. The support column 260 is provided on the first bottom plate 20 and connected to the first reinforcing rib 25, and the positioning column 261 is provided at one end of the support column 260 away from the first bottom plate 20.

[0072] In the above embodiment, a plurality of positioning devices 26 are arranged on the first base plate 20, the positioning devices 26 extend a certain height toward the upper shell 1, and the plurality of positioning devices 26 are respectively arranged on both sides and the middle of the first base plate 20, the positioning devices 26 include a support column 260 and a positioning column 261, wherein the support column 260 is arranged on the first base plate 20 and is connected to the first reinforcing rib 25, a height difference is formed between an end surface of the support column 260 away from the first base plate 20 and an end surface of the first reinforcing rib 25 away from the first base plate 20, the positioning column 261 is arranged at an end of the support column 260 away from the first base plate 20, and the positioning column 261, the support column 260, the first reinforcing rib 25 and the first base plate 20 are an integrated part, when the circuit board is placed on the lower shell 2, a positioning groove corresponding to the positioning column 261 is arranged on the circuit board, so that the positioning column 261 passes through the positioning groove on the circuit board, fixes the circuit board in the lower shell 2, enhances the connection stability between the circuit board and the lower shell 2, and reduces the possibility of movement or loosening of the circuit board during use.

[0073] Furthermore, a plurality of positioning holes 15 are provided on the second base plate 10, and the plurality of positioning holes 15 are provided corresponding to the plurality of positioning devices 26. In addition, a plurality of positioning holes 15 are provided on both sides and the middle of the first base plate 20, respectively. The positioning holes 15 are connected to the second reinforcing ribs 14, so that the positioning holes 15, the second reinforcing ribs 14 and the second base plate 10 are integrated. The corresponding arrangement of the positioning holes 15 and the positioning devices 26 ensures that the circuit board or other components can be accurately placed in the predetermined position, thereby improving the accuracy of assembly.

[0074] Reference Figure 5In one embodiment, a connecting portion 16 is provided on the upper shell 1 , and a plurality of threaded holes 17 are provided on the connecting portion 16 .

[0075] In the above embodiment, a connecting portion 16 for fixing the entire BMS shell to the battery pack case is provided on the upper shell 1, wherein there are four connecting portions 16, and they are located at the four corners of the upper shell 1. In addition, the connecting portion 16 includes a first connecting portion 160 and a second connecting portion 161, and the first connecting portion 160 and the second connecting portion 161 are in a relatively arranged state, wherein the relative direction is consistent with the second short frame 13, and the first connecting portion 160 is preferably L-shaped and connected to the second short frame 13, and one end of the second connecting portion 161 is connected to the second short frame 13, and the second connecting portion 161 is also connected to the second short frame 13 through a connecting plate 162. In addition, a plurality of bolt holes are provided on the connecting portion 16 for fixing the entire BMS shell to the battery pack case, and the BMS shell is fixed by bolts passing through the bolt holes, so that a stable connection can be formed between the BMS shell and the battery pack case to resist vibration and impact.

[0076] This embodiment provides a battery pack, comprising the BMS housing described in any one of the above embodiments.

[0077] In the above embodiment, the battery pack includes a BMS shell, which provides a physical barrier to protect the circuit boards and electronic components inside the BMS from the influence of the external environment, such as dust, water vapor, vibration and mechanical damage, and can prevent the short circuit or other electrical failures that may occur in the battery pack from harming the environment or users, thereby reducing the risk of safety accidents. The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the utility model, or directly or indirectly used in other related technical fields, is also included in the patent protection scope of the utility model.

Claims

1. A BMS housing, characterized in that: It includes an upper shell, a lower shell and a protective cover; The upper shell is snap-connected to the lower shell, and a hollow accommodating chamber is formed between the upper shell and the lower shell for placing a circuit board; The upper shell is provided with a communication port corresponding to the protective cover for accommodating the communication end of the circuit board, and the protective cover is snap-connected to the communication port of the upper shell.

2. The BMS housing according to claim 1, characterized in that: The lower shell includes a first bottom plate and a first frame arranged on the edge of the first bottom plate. A snap-fit ​​device is arranged on the lower shell. The snap-fit ​​device includes a plurality of first snaps and a plurality of second snaps arranged on the first frame, and the first snaps are arranged adjacent to the second snaps.

3. The BMS housing according to claim 2, characterized in that: A groove is formed at a connection between the first buckle and the first frame, and the groove extends toward a direction close to the first bottom plate.

4. The BMS housing according to claim 2, characterized in that: The first frame is provided with a first limiting groove recessed toward the accommodating chamber, the first limiting groove corresponds to the first buckle and extends toward an edge away from the first bottom plate.

5. The BMS housing according to claim 2, characterized in that: The first frame is also provided with a second limiting groove recessed toward the accommodating chamber, the second limiting groove corresponds to the second buckle and extends toward an edge away from the first bottom plate.

6. The BMS housing according to claim 2, characterized in that: The upper shell includes a second base plate and a second frame arranged on the edge of the second base plate. A card slot is arranged on the upper shell, and the card slot includes a plurality of first card slots and a plurality of second card slots arranged on the second frame. The first card slot corresponds to the first buckle, and the second card slot corresponds to the second buckle.

7. The BMS housing according to claim 6, characterized in that: The second frame is provided with a voltage collection port located between adjacent second card slots, the first frame is provided with a pressure collection baffle located between adjacent second buckles, and the pressure collection baffle corresponds to the voltage collection port.

8. The BMS housing according to claim 7, characterized in that: The communication port is arranged on the second frame, and the communication port is arranged adjacent to the voltage collection port, and a plurality of locking tongues are arranged on the side wall of the communication port, and a locking groove corresponding to the locking tongue is arranged on the protective cover, and the protective cover is connected to the upper shell body by being clamped in the locking groove by the locking tongue.

9. The BMS housing according to claim 8, characterized in that: A wiring harness notch is arranged on the protective cover, and the wiring harness notch is located between adjacent locking grooves.

10. The BMS housing according to claim 8, characterized in that: A plurality of first reinforcing ribs are disposed on the first bottom plate, and the first reinforcing ribs protrude toward the upper shell body by a first specified height.

11. The BMS housing according to claim 10, characterized in that: The second bottom plate is provided with a plurality of second reinforcing ribs corresponding to the first reinforcing ribs, and the second reinforcing ribs protrude toward the lower shell body by a second specified height.

12. The BMS housing according to claim 11, characterized in that: A plurality of positioning devices are arranged on the first bottom plate, and the positioning devices include a support column and a positioning column. The support column is arranged on the first bottom plate and connected to the first reinforcing rib. The positioning column is arranged at one end of the support column away from the first bottom plate.

13. The BMS housing according to claim 12, characterized in that: The second bottom plate is provided with a plurality of positioning holes corresponding to the positioning device, and the positioning holes are connected to the second reinforcing ribs.

14. The BMS housing according to claim 6, characterized in that: The upper shell is provided with a connecting portion, and the connecting portion is provided with a plurality of threaded holes.

15. A battery pack, characterized in that: Comprising the BMS housing according to any one of claims 1-14.

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