Battery management system and battery pack

Abstract

The utility model relates to the technical field of batteries, and provides a battery management system and a battery pack. The battery management system comprises a shell, at least two first circuit boards and a second circuit board, wherein the at least two first circuit boards are arranged in the shell, each first circuit board extends in the first direction, the at least two first circuit boards are arranged at intervals in the second direction, and every two adjacent first circuit boards are electrically connected. The second circuit board is arranged in the shell, the second circuit board extends in the second direction, the second circuit board abuts against the at least two first circuit boards in the first direction, and the second circuit board is electrically connected with one of the first circuit boards. Wherein the first direction is perpendicular to the second direction. Therefore, the size and the weight of the battery management system can be optimized, and the technical problem that the battery management system occupies more installation space in the battery pack is solved.

Description

Technical Field

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

[0002] In the related art, the battery packs in the battery management system are all designed as a whole, which makes the battery management system large in size and heavy in weight, and the battery management system occupies more installation space in the battery pack, affecting the space layout in the battery pack. Utility Model Content

[0003] The embodiments of the utility model provide a battery management system and a battery pack. By improving the structure of the circuit board, the size and weight of the battery management system can be optimized, and the technical problem that the battery management system occupies a large installation space in the battery pack can be improved.

[0004] In a first aspect, an embodiment of the present utility model provides a battery management system, comprising:

[0005] case;

[0006] At least two first circuit boards are arranged in the housing, each of the first circuit boards extends along a first direction, the at least two first circuit boards are arranged at intervals along a second direction, and every two adjacent first circuit boards are electrically connected;

[0007] a second circuit board, disposed in the housing, the second circuit board extending along the second direction, the second circuit board abutting against the at least two first circuit boards along the first direction, and the second circuit board being electrically connected to one of the first circuit boards;

[0008] The first direction is perpendicular to the second direction.

[0009] In one embodiment, a wireless signal communicator is constructed on the first circuit board and / or the second circuit board, and the wireless signal communicator is configured to signal connect to the battery module.

[0010] In one embodiment, the housing comprises:

[0011] Base;

[0012] An upper cover, covering the base cavity;

[0013] Wherein, the base and / or the upper cover are constructed with ribs, one side of the ribs abuts against one of the first circuit boards or the second circuit boards, and the other side of the ribs abuts against the side wall of the base or the upper cover, wherein the wireless signal communicator is arranged on a side of the first circuit board or the second circuit board close to the ribs.

[0014] In one embodiment, connecting ears are constructed on opposite sides of the base or the upper cover, and a connecting hole is formed on each of the connecting ears.

[0015] In one embodiment, a plurality of cutout areas are configured on the connecting ear, and reinforcing ribs are formed between the cutout areas and the connecting hole and between every two adjacent cutout areas.

[0016] In one embodiment, the base includes a bottom plate and a first side wall enclosed around the bottom plate, and the upper cover includes a top wall and a second side wall enclosed around the top wall, wherein a first connecting member is constructed on a side of the first side wall facing the second side wall, and a second connecting member is constructed on a side of the second side wall facing the first side wall, and the first connecting member is connected to the second connecting member.

[0017] In one embodiment, one of the first connecting member and the second connecting member includes a clamping column, and the other includes a clamping slot, and the clamping column is clamped in the clamping slot;

[0018] And / or, one of the first connecting member and the second connecting member includes a positioning post, and the other includes a positioning groove, and the positioning post is inserted into the positioning groove.

[0019] In one embodiment, a mounting hole is configured on the first side wall and / or the second side wall on a side away from the second circuit board, and a connector is configured on at least one of the first circuit boards, and the connector is electrically connected to the main control system through the mounting hole;

[0020] Wherein, the connecting ear is arranged coplanar with the first side wall or the second side wall where the mounting hole is located.

[0021] In one embodiment, the top wall includes a first plane, a second plane, and a slope connected between the first plane and the second plane, wherein the distance between the first plane and the bottom plate is h1, and the distance between the second plane and the bottom plate is h2, satisfying: h1>h2; wherein the second circuit board is located in the area corresponding to the vertical projection of the second plane.

[0022] In one embodiment, one of every two adjacent first circuit boards is configured with a first vertical connector, and the other is configured with a second vertical connector, and the first vertical connector is electrically connected to the second vertical connector.

[0023] In one embodiment, a third vertical connector is configured on a side of the second circuit board facing the first circuit board, a horizontal connector is configured on one of the first circuit boards, and the third vertical connector is electrically connected to the horizontal connector.

[0024] In a second aspect, an embodiment of the present invention provides a battery pack, comprising the battery management system as described above.

[0025] Beneficial effects of the embodiments of the utility model:

[0026] In an embodiment of the utility model, by forming an installation cavity in the shell to install at least two first circuit boards and a second circuit board, based on dividing the entire large-area circuit board in the battery management system into a plurality of small-area circuit boards that are electrically connected to each other, and based on the position distribution and extension direction distribution of the at least two first circuit boards and the second circuit boards, the volume of the shell can be reduced, the size and weight of the battery management system can be optimized, thereby improving the technical problem that the battery management system occupies more installation space in the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a three-dimensional schematic diagram of a battery management system provided by an embodiment of the utility model;

[0029] Figure 2 is an exploded diagram of a battery management system provided by an embodiment of the utility model;

[0030] Figure 3 It is a three-dimensional schematic diagram of a base provided by an embodiment of the utility model.

[0031] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle.

[0032] Figure 5 It is a three-dimensional schematic diagram of an upper cover provided by an embodiment of the utility model.

[0033] Figure 6 It is a three-dimensional schematic diagram of the connection between the first circuit board and the second circuit board provided by an embodiment of the utility model.

[0034] Figure 7 This is a front view of two first circuit boards connected according to an embodiment of the utility model.

[0035] Reference numerals:

[0036] 10-shell, 110-base, 111-bottom plate, 112-first side wall, 120-upper cover, 121-top wall, 122-second side wall, 123-first plane, 124-second plane, 125-inclined surface, 130-mounting cavity, 140-rib, 150-connecting ear, 160-connecting hole, 170-dig-out area, 180-reinforcement rib, 20-first circuit board, 210-first vertical connector, 220-second vertical connector, 230-horizontal connector, 30-second circuit board, 310-third vertical connector, 40-wireless signal communicator, 510-card post, 520-card slot, 530-positioning post, 540-positioning slot, 550-mounting hole, 60-connector. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0038] like Figures 1 to 7 As shown, an embodiment of the present application provides a battery management system. The battery management system includes a housing 10, at least two first circuit boards 20 and a second circuit board 30. The housing 10 is hollow inside to form a mounting cavity 130. At least two first circuit boards 20 are arranged in the mounting cavity 130, each of which extends along the first direction, and at least two first circuit boards 20 are arranged at intervals along the second direction, and each adjacent two first circuit boards 20 are electrically connected. The second circuit board 30 is arranged in the mounting cavity 130, and the second circuit board 30 extends along the second direction. Along the first direction, the second circuit board 30 abuts against at least two first circuit boards 20, and the second circuit board 30 is electrically connected to one of the first circuit boards 20. The first direction is perpendicular to the second direction.

[0039] In some embodiments, at least two first circuit boards 20 and a second circuit board 30 are installed by forming an installation cavity 130 in the shell 10. Based on dividing the entire large-area circuit board in the battery management system into multiple small-area circuit boards that are electrically connected to each other, and based on the position distribution and extension direction distribution of at least two first circuit boards 20 and the second circuit board 30, the volume of the shell 10 can be reduced, and the size and weight of the battery management system can be optimized, thereby improving the technical problem that the battery management system occupies more installation space in the battery pack.

[0040] It can be understood that in the present application, the circuit board is divided into at least two first circuit boards 20 and a second circuit board 30, and at least two first circuit boards 20 are arranged at intervals along the second direction. Compared with the solution in the related art that a whole circuit board is arranged in the housing 10, the circuit board layout method in the present application can reduce the length and width dimensions of the housing 10. Only by appropriately increasing the height of the housing 10, at least two first circuit boards 20 and the second circuit board 30 can be installed in the installation cavity 130. Based on the second circuit board 30 abutting against at least two first circuit boards 20 in the first direction, it can prevent the second circuit board 30 from causing the height of the housing 10 to increase too much. Therefore, based on the reasonable layout of at least two first circuit boards 20 and the second circuit board 30 in the installation cavity 130, the volume of the housing 10 is greatly reduced, the manufacturing materials of the housing 10 are saved, the cost and weight of the housing 10 are reduced, and the space occupied by the battery management system in the battery pack is reduced, which is conducive to the reasonable planning of the internal space of the battery pack.

[0041] like Figure 2 As shown, the number of the first circuit boards 20 can be set to two. Compared with the solution in the related art that a whole circuit board is arranged in the housing 10, a whole large-area circuit board is divided into two first circuit boards 20 and a second circuit board 30, thereby reducing the length and width, greatly reducing the volume of the housing 10, saving the manufacturing materials of the housing 10, reducing the cost and weight of the housing 10, reducing the space occupied by the battery management system in the battery pack, and facilitating the reasonable planning of the internal space of the battery pack.

[0042] like Figure 6 As shown, the first direction is the horizontal plane direction, that is, at least two first circuit boards 20 are arranged horizontally. The second direction is the height direction, that is, the second circuit board 30 is arranged vertically. Based on the at least two first circuit boards 20 being arranged at intervals along the height direction, the spacing direction is the same as the setting direction of the second circuit board 30, and the second circuit board 30 is abutted against at least two first circuit boards 20 in the horizontal direction. In this way, it can be prevented that the first circuit board 20 and the second circuit board 30 occupy a large height space, and the height of the housing 10 can be made lower. In combination with the reduction of the length and width of the housing 10, the volume of the housing 10 can be greatly reduced and the weight of the housing 10 can be reduced.

[0043] It is understandable that the battery management system (BMS) is used to detect parameters such as voltage, current and temperature of the battery module, so it is necessary to connect the battery management system to the battery module to obtain voltage parameters, current parameters and temperature parameters.

[0044] In the related art, the battery management system is electrically connected to the battery module through a wiring harness, which will cause the wiring harness cost to occupy a certain proportion of the battery pack cost, and too many wiring harnesses may also cause condensation in the battery pack. Once condensation is generated, it is easy to enter the interior of the shell 10 and cause safety impacts, while shortening the service life of the battery pack.

[0045] like Figure 6 As shown, in some embodiments, a wireless signal communicator 40 is constructed on the first circuit board 20 and / or the second circuit board 30, and the wireless signal communicator 40 is configured to connect the battery module with a signal. Signals such as voltage parameters, current parameters, and temperature parameters of the battery module are received through the wireless signal communicator 40, instead of achieving electrical connection with the battery module through a wiring harness. In this way, the production cost of the battery pack can be reduced, the complexity of the wiring harness can be prevented from affecting the installation of the battery management system, and the risk of condensation inside the battery pack can be prevented from increasing due to too many wiring harnesses, which can reduce the safety hazards of the battery pack and extend the service life of the battery pack.

[0046] For example, the wireless signal communicator 40 may be a Bluetooth chip, a WIFI module, an antenna module, etc.

[0047] The wireless signal communicator 40 may be installed on the first circuit board 20. Alternatively, the wireless signal communicator 40 may be installed on the second circuit board 30. Alternatively, the wireless signal communicator 40 may be installed on both the first circuit board 20 and the second circuit board 30, so that the wireless signal communicator 40 on the first circuit board 20 and the wireless signal communicator 40 on the second circuit board 30 receive electrical signals from different battery modules respectively.

[0048] like Figure 1 and Figure 2 As shown, in some embodiments, the housing 10 includes a base 110 and an upper cover 120. The upper cover 120 covers the base 110 to form a mounting cavity 130. The base 110 and / or the upper cover 120 are configured with ribs 140, one side of the ribs 140 abuts against one of the first circuit boards 20 or the second circuit boards 30, and the other side of the ribs 140 abuts against the side wall of the base 110 or the upper cover 120, wherein the wireless signal communicator 40 is disposed on one side of the first circuit board 20 or the second circuit board 30 close to the ribs 140.

[0049] It is understood that at least one of the base 110 and the upper cover 120 has a groove, and when the upper cover 120 covers the base 110, the groove can be closed to form the installation cavity 130. Specifically, the base 110 is configured with a groove with the notch facing upward, and the upper cover 120 is configured with a groove with the notch facing downward.

[0050] like Figure 3 As shown, a rib 140 is constructed in the base 110 and / or the upper cover 120, so that one side of the rib 140 abuts against one of the first circuit boards 20 or the second circuit boards 30, and the other side of the rib 140 abuts against the side wall of the bottom plate 111 or the upper cover 120, and the wireless signal communicator 40 is arranged on a side of the first circuit board 20 or the second circuit board 30 close to the rib 140. In this way, the wireless signal communicator 40 can be spaced from the side wall of the bottom plate 111 or the upper cover 120 by at least the length of the rib 140 to meet the installation requirements of the wireless signal communicator 40.

[0051] For example, the rib 140 is located in the area where the first circuit board 20 is located, then one side of the rib 140 abuts against the first circuit board 20, and the other side of the rib 140 abuts against the side wall of the bottom plate 111 or the upper cover 120. The length of the first circuit board 20 can be the same as the length of the second circuit board 30. Then the wireless signal communicator 40 can be arranged on the side of the first circuit board 20 close to the rib 140, or on the side of the second circuit board 30 close to the rib 140, so that the wireless signal communicator 40 and the side wall of the bottom plate 111 or the upper cover 120 are at least separated by the length of the rib 140 to meet the installation requirements of the wireless signal communicator 40.

[0052] For example, the rib 140 is located in the area where the second circuit board 30 is located, then one side of the rib 140 abuts against the second circuit board 30, and the other side of the rib 140 abuts against the side wall of the bottom plate 111 or the upper cover 120. The wireless signal communicator 40 can be arranged on the side of the first circuit board 20 close to the rib 140, or on the side of the second circuit board 30 close to the rib 140, so that the wireless signal communicator 40 and the side wall of the bottom plate 111 or the upper cover 120 are at least separated by the length of the rib 140 to meet the installation requirements of the wireless signal communicator 40.

[0053] For example, the rib 140 can be provided on the base 110. The rib 140 extends along the width direction of the base 110, one side of the rib 140 abuts against the first side wall 112 of the base 110, and the other side of the rib 140 abuts against the second circuit board 30. Then, in the width direction, the wireless signal communicator 40 and the first side wall 112 of the bottom plate 111 can be spaced apart by a certain length to meet the installation requirements of the wireless signal communicator 40. The rib 140 can be integrally formed on the side of the base 110 facing the upper cover 120, or the rib 140 can be bonded to the side of the base 110 facing the upper cover 120, or the rib 140 can also be hot-melt connected to the side of the base 110 facing the upper cover 120.

[0054] For example, the rib 140 can be provided on the upper cover 120. The rib 140 extends along the width direction of the upper cover 120, one side of the rib 140 abuts against the second side wall 122 of the upper cover 120, and the other side of the upper cover 120 abuts against the second circuit board 30. Then, in the width direction, the wireless signal communicator 40 and the second side wall 122 of the upper cover 120 can be spaced apart by a certain length to meet the installation requirements of the wireless signal communicator 40. The rib 140 can be integrally formed on the side of the upper cover 120 facing the base 110, or the rib 140 can be bonded to the side of the upper cover 120 facing the base 110, or the rib 140 can also be hot-melt connected to the side of the upper cover 120 facing the base 110.

[0055] The length of the rib 140 is greater than or equal to 25 mm. For example, the length of the rib 140 can be set to 25 mm.

[0056] When the rib 140 is located in the area where the first circuit board 20 is located, one side of the first circuit board 20 abuts against the rib 140, and a gap of about 3 mm is left between the other side of the first circuit board 20 and the side wall of the base 110 or the upper cover 120 to meet the installation requirements of the first circuit board 20.

[0057] When the rib 140 is located in the area where the second circuit board 30 is located, one side of the second circuit board 30 abuts against the rib 140, and a gap of about 3 mm is left between the other side of the second circuit board 30 and the side wall of the base 110 or the upper cover 120 to meet the installation requirements of the second circuit board 30.

[0058] like Figure 3 As shown, in some embodiments, connecting ears 150 are configured on opposite sides of the base 110 or the upper cover 120 , and a connecting hole 160 is formed on each connecting ear 150 .

[0059] For example, the connecting ears 150 are configured on both opposite sides of the base 110. For example, the connecting ears 150 are configured on both opposite sides of the upper cover 120.

[0060] Thus, the housing 10 can have only two externally fixed installation points, and the housing 10 can be fixed by installing a fastener in the connection hole 160 of each connection ear 150. Compared with the traditional housing 10 having 3, 4 or more installation points, this solution can reduce consumables and save installation time while ensuring stable installation.

[0061] It is understandable that when the housing 10 is installed on the device to be installed, the steps involved include at least: taking tools, locking fasteners, checking whether the fasteners are properly assembled, and painting. Based on the reduction of installation points, at least one set of processes of locking fasteners, checking whether the fasteners are properly assembled, and painting can be omitted, so that the installation of each housing 10 can be saved at least 3 minutes to 5 minutes.

[0062] The base 110 and the upper cover 120 are both plastic parts. The two connecting ears 150 can be integrally injection molded on the base 110 or the upper cover 120. Based on the use of plastic parts to integrally inject mold the base 110 and the upper cover 120, the base 110 and the upper cover 120 can have good insulation and pressure resistance, and the weight of the two is relatively light.

[0063] like Figure 4 As shown, in some embodiments, a plurality of cutout areas 170 are configured on the connecting ear 150 , and reinforcing ribs 180 are formed between the cutout areas 170 and the connecting hole 160 , and between every two adjacent cutout areas 170 .

[0064] It is understandable that, based on the setting of the material removal area 170, the consumables of the connecting ear 150 can be reduced, and the manufacturing cost of the housing 10 can be reduced. At the same time, the reinforcing ribs 180 formed between two adjacent material removal areas 170 and between the material removal area 170 and the connecting hole 160 can strengthen the structure of the connecting ear 150 to improve the structural strength of the connecting ear 150.

[0065] For example, four cutout areas 170 are constructed on the connecting ear 150 , annular reinforcing ribs 180 are formed between the four cutout areas 170 and the connecting hole 160 , and a linear reinforcing rib 180 is formed between every two adjacent cutout areas 170 .

[0066] The material removal area 170 can be a non-through hole provided at the rear side of the connecting ear 150, and the front side of the connecting ear 150 is a complete plane. Thus, the aesthetics of the housing 10 can be improved. Of course, the material removal area 170 can also be a through hole, which can further achieve the effect of residual material and further reduce the manufacturing cost of the housing 10.

[0067] In some embodiments, the base 110 includes a bottom plate 111 and a first side wall 112 enclosed around the bottom plate 111, and the upper cover 120 includes a top wall 121 and a second side wall 122 enclosed around the top wall 121, wherein a first connecting member is constructed on a side of the first side wall 112 facing the second side wall 122, and a second connecting member is constructed on a side of the second side wall 122 facing the first side wall 112, and the first connecting member is connected to the second connecting member.

[0068] Based on the connection between the first connecting member and the second connecting member, the first side wall 112 and the second side wall 122 are connected to each other, thereby making the base 110 and the upper cover 120 tightly covered.

[0069] The bottom plate 111 is a rectangular plate. The first side wall 112 is four rectangular plates enclosed on four sides of the bottom plate 111. Since the base 110 is a plastic part, the first side wall 112 and the bottom plate 111 are integrally formed plastic parts. The first connecting member is also an integrally formed plastic part on the first side wall 112.

[0070] The top wall 121 can also be set as a rectangular plate. Then the second side wall 122 is four rectangular plates enclosed on the four sides of the top wall 121. Since the upper cover 120 is a plastic part, the second side wall 122 and the top wall 121 are integrally formed plastic parts. The second connecting member is also a plastic part formed in two parts on the first side wall 112.

[0071] like Figure 3 and Figure 5 As shown, in some embodiments, one of the first connecting member and the second connecting member includes a clamping column 510 , and the other includes a clamping slot 520 , and the clamping column 510 is clamped in the clamping slot 520 .

[0072] The first side wall 112 and the second side wall 122 are connected by locking the locking column 510 into the locking groove 520 , thereby achieving reliable covering between the base 110 and the upper cover 120 .

[0073] For example, the first connection member is a clamping column 510, and the second connection member is a clamping slot 520. When the upper cover 120 covers the base 110, the clamping column 510 is inserted into the clamping slot 520 from top to bottom to fix the upper cover 120 and the base 110 to each other.

[0074] For example, the first connection member is a slot 520, and the second connection member is a clamping column 510. When the upper cover 120 covers the base 110, the clamping column 510 is inserted into the slot 520 from bottom to top, so that the upper cover 120 and the base 110 are fixed to each other.

[0075] A triangular stopper is formed on the clamping column 510. A limiting portion that matches the stopper is formed on the clamping slot 520. When the clamping column 510 is clamped in the clamping slot 520, the stopper abuts against the limiting portion to prevent the clamping column 510 from falling off from the clamping slot 520, thereby ensuring a reliable connection between the upper cover 120 and the base 110.

[0076] The number of the clamping posts 510 can be multiple, and the multiple clamping posts 510 are arranged at intervals along the circumferential direction of the first side wall 112 or the second side wall 122. The number and position of the clamping slots 520 correspond to the number and position of the clamping posts 510.

[0077] Please continue reading Figure 3 and Figure 5 In some embodiments, one of the first connecting member and the second connecting member includes a positioning column 530 , and the other includes a positioning groove 540 , and the positioning column is inserted into the positioning groove 540 .

[0078] Based on the mutual connection between the positioning column 530 and the positioning groove 540 , the base 110 and the upper cover 120 can be assembled accurately and quickly, thereby improving the assembly efficiency of the base 110 and the upper cover 120 .

[0079] For example, the first connecting member is a positioning column 530 , and the second connecting member is a positioning groove 540 .

[0080] For example, the first connecting member is a positioning groove 540 , and the second connecting member is a positioning column 530 .

[0081] The number of the positioning posts 530 can be multiple, and the multiple positioning posts 530 are arranged at intervals along the circumferential direction of the first side wall 112 or the second side wall 122. The number and positions of the positioning grooves 540 correspond to the number and positions of the positioning posts 530.

[0082] like Figure 3 and Figure 5 As shown, in some embodiments, a mounting hole 550 is configured on the first side wall 112 and / or the second side wall 122 on a side away from the second circuit board 30, and a connector 60 is configured on at least one first circuit board 20, and the connector 60 is electrically connected to the main control system through the mounting hole 550. The connecting ear 150 is arranged coplanar with the first side wall 112 or the second side wall 122 where the mounting hole 550 is located.

[0083] It is understandable that the battery management system can be used to detect the voltage parameters, current parameters and temperature parameters of several cells in the surrounding area. The number of cells in each battery pack may be dozens or hundreds, so it is necessary to arrange multiple battery management systems in the battery pack, and each battery management system, as a slave control system, needs to transmit data to the master control system through the connector 60.

[0084] The connector 60 may partially pass through the mounting hole 550 so that a plug can be plugged into the connector 60 to achieve electrical connection between the battery management system and the main control system.

[0085] The connector 60 may also be partially stuck in the mounting hole 550 and not pass through the mounting hole 550. The plug is then inserted into the mounting hole 550 to achieve electrical connection with the connector 60, so as to achieve electrical connection between the battery management system and the main control system.

[0086] The two connecting ears 150 are coplanar with the first side wall 112 or the second side wall 122 where the mounting hole 550 is located, and the two connecting ears 150 can be symmetrically arranged along the mounting hole 550. Therefore, when the housing 10 is fixed to the device to be installed by using the two connecting ears 150, the housing 10 can have two installation postures. For example, the housing 10 can be installed vertically, and at this time, the mounting hole 550 is set downward, which can prevent condensation from entering the housing 10 from the mounting hole 550. For example, the housing 10 can also be installed horizontally, and at this time, the mounting hole 550 will also fit the surface of the device to be installed, which can also prevent condensation from entering the housing 10 from the mounting hole 550.

[0087] It can be understood that since the connecting ear 150 is coplanar with the first side wall 112 or the second side wall 122 where the mounting hole 550 is located, there is no risk of condensation invading the interior of the shell 10 in both installation postures, thereby improving the service life and safety of the battery pack.

[0088] For example, the mounting hole 550 is disposed on the front side wall of the first side wall 112 , and the two connecting ears 150 are integrally formed on opposite sides of the front side wall of the first side wall 112 .

[0089] For example, the mounting hole 550 is disposed on the front side wall of the second side wall 122 , and the two connecting ears 150 are integrally formed on opposite sides of the front side wall of the second side wall 122 .

[0090] See also Figure 5 In some embodiments, the top wall 121 includes a first plane 123, a second plane 124, and a slope 125 connected between the first plane 123 and the second plane 124, wherein the distance between the first plane 123 and the bottom plate 111 is h1, and the distance between the second plane 124 and the bottom plate 111 is h2, satisfying: h1>h2; wherein the second circuit board 30 is located in the area corresponding to the vertical projection of the second plane 124.

[0091] Since the top wall 121 includes a first plane 123 and a second plane 124, and the height of the first plane 123 from the bottom plate 111 is less than the height of the second plane 124 from the bottom plate 111, the area where the second plane 124 is located can accommodate the second circuit board 30 to meet the installation requirements of the second circuit board 30. At the same time, the height of the housing 10 at the side away from the second circuit board 30 is lower, further reducing the volume of the housing 10.

[0092] It is understandable that, based on the second circuit board 30 being placed vertically, the area where the second circuit board 30 is located requires a certain height. If at least two first circuit boards 20 are placed horizontally, the area where the first circuit boards 20 are located requires a smaller height. Based on the above spatial arrangement, the size of the housing 10 can be reduced, the consumables of the housing 10 can be reduced, and the volume can be reduced while reducing costs.

[0093] It should be noted that the vertical projection direction is Figure 2 The projection direction from top to bottom in the viewing angle. The area corresponding to the vertical projection of the second circuit board 30 on the second plane 124 refers to: the area where the second circuit board 30 is located in the installation cavity 130 with a cavity height of h2.

[0094] In some embodiments, at least two first circuit boards 20 are located in an area corresponding to an elevation projection of the first plane 123 .

[0095] In some embodiments, a portion of at least two first circuit boards 20 is located in an area corresponding to the vertical projection of the first plane 123 , and another portion of at least two first circuit boards 20 is located in an area corresponding to the vertical projection of the inclined surface 125 .

[0096] In some embodiments, a portion of at least two first circuit boards 20 is located in an area corresponding to the vertical projection of the first plane 123, a portion of at least two first circuit boards 20 is located in an area corresponding to the vertical projection of the inclined surface 125, and another portion of at least two first circuit boards 20 is located in an area corresponding to the vertical projection of the second plane 124.

[0097] Among them, 42 mm ≤ h1 ≤ 50 mm, 32 mm ≤ h2 is less than or equal to 38 mm. For example, the distance between the first plane 123 and the bottom plate 111 is 42 mm, 45 mm, 50 mm, or any value between the two. The distance between the second plane 124 and the bottom plate 111 is 32 mm, 35 mm, 38 mm, or any value between the two.

[0098] The inner side of the second plane 124 has spaced blocks, and mounting slots are formed between the spaced blocks. The bottom plate 111 may also be provided with spaced blocks in the area corresponding to the second plane 124, and mounting slots are formed between the spaced blocks. The upper and lower sides of the second circuit board 30 may be respectively connected to the mounting slots on the upper and lower sides.

[0099] The bottom plate 111 is provided with fastening holes, and the first circuit board 20 is provided with through holes. A hexagonal stud is provided between each two adjacent first circuit boards 20, and the hexagonal stud is connected to the through hole. A fastener is passed through the fastening hole, and the fastener is passed through the hexagonal stud. At the same time, a fastener is also passed through the through hole of the top first circuit board 20. In this way, each two adjacent first circuit boards 20 are fixed to each other, and the first circuit board 20 is fixed to the bottom plate 111.

[0100] like Figure 7 As shown, in some embodiments, one of every two adjacent first circuit boards 20 is configured with a first vertical connector 210 , and the other is configured with a second vertical connector 220 , and the first vertical connector 210 is electrically connected to the second vertical connector 220 .

[0101] The electrical connection between each two adjacent first circuit boards 20 is realized based on the mutual plugging of the first vertical connector 210 and the second vertical connector 220, so that the assembly between each two adjacent first circuit boards 20 is convenient. At the same time, there is no need to use a wire harness to connect each two adjacent first circuit boards 20, which can reduce the wiring time and wire soldering time, and realize the rapid assembly between each two adjacent first circuit boards 20.

[0102] like Figure 2 and Figure 6 As shown, in some embodiments, a third vertical connector 310 is configured on the side of the second circuit board 30 facing the first circuit board 20 , a horizontal connector 230 is configured on one of the first circuit boards 20 , and the third vertical connector 310 is electrically connected to the horizontal connector 230 .

[0103] The electrical connection between the first circuit board 20 and the second circuit board 30 is realized based on the mutual plugging of the horizontal connector 230 and the third vertical connector 310, so that the assembly between the first circuit board 20 and the second circuit board 30 is convenient. At the same time, there is no need to use a wire harness to connect the first circuit board 20 and the second circuit board 30, which can reduce the wiring time and wire soldering time, and realize the rapid assembly between the first circuit board 20 and the second circuit board 30.

[0104] Among them, the first vertical connector 210, the second vertical connector 220, the horizontal connector 230 and the third vertical connector 310 are all flexible connectors. There is an allowable assembly error between the first vertical connector 210 and the second vertical connector 220, and there is an allowable assembly error between the horizontal connector 230 and the third vertical connector 310. Then, the assembly accuracy of the first vertical connector 210, the second vertical connector 220, the horizontal connector 230 and the third vertical connector 310 on the first circuit board 20 and the second circuit board 30 can be appropriately abandoned, so as to improve the assembly efficiency and reduce the defective rate.

[0105] On the other hand, an embodiment of the present application further provides a battery pack, which includes the battery management system in the aforementioned embodiment.

[0106] In some embodiments, at least two first circuit boards 20 and a second circuit board 30 are installed by forming an installation cavity 130 in the shell 10. Based on dividing the entire large-area circuit board in the battery management system into multiple small-area circuit boards that are electrically connected to each other, and based on the position distribution and extension direction distribution of at least two first circuit boards 20 and the second circuit board 30, the volume of the shell 10 can be reduced, and the size and weight of the battery management system can be optimized, thereby improving the technical problem that the battery management system occupies more installation space in the battery pack.

[0107] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A battery management system, characterized in that: include: case; At least two first circuit boards are arranged in the housing, each of the first circuit boards extends along a first direction, the at least two first circuit boards are arranged at intervals along a second direction, and every two adjacent first circuit boards are electrically connected; a second circuit board, disposed in the housing, the second circuit board extending along the second direction, the second circuit board abutting against the at least two first circuit boards along the first direction, and the second circuit board being electrically connected to one of the first circuit boards; The first direction is perpendicular to the second direction.

2. The battery management system according to claim 1, characterized in that: A wireless signal communicator is constructed on the first circuit board and / or the second circuit board, and the wireless signal communicator is configured to signal connect the battery module.

3. The battery management system according to claim 2, characterized in that: The housing comprises: Base; An upper cover, covering the base; Wherein, the base and / or the upper cover are constructed with ribs, one side of the ribs abuts against one of the first circuit boards or the second circuit boards, and the other side of the ribs abuts against the side wall of the base or the upper cover, wherein the wireless signal communicator is arranged on a side of the first circuit board or the second circuit board close to the ribs.

4. The battery management system according to claim 3, characterized in that: The base or the upper cover is provided with connecting ears on two opposite sides, and each of the connecting ears is provided with a connecting hole.

5. The battery management system according to claim 4, characterized in that: A plurality of cutout areas are constructed on the connecting ear, and reinforcing ribs are formed between the cutout areas and the connecting hole and between every two adjacent cutout areas.

6. The battery management system according to claim 4, characterized in that: The base includes a bottom plate and a first side wall surrounding the bottom plate, and the upper cover includes a top wall and a second side wall surrounding the top wall, wherein a first connecting member is constructed on a side of the first side wall facing the second side wall, and a second connecting member is constructed on a side of the second side wall facing the first side wall, and the first connecting member is connected to the second connecting member.

7. The battery management system according to claim 6, characterized in that: One of the first connecting member and the second connecting member includes a clamping column, and the other includes a clamping slot, and the clamping column is clamped in the clamping slot; And / or, one of the first connecting member and the second connecting member includes a positioning post, and the other includes a positioning groove, and the positioning post is inserted into the positioning groove.

8. The battery management system according to claim 6, characterized in that: A mounting hole is configured on the first side wall and / or the second side wall on a side away from the second circuit board, and a connector is configured on at least one of the first circuit boards, and the connector is electrically connected to the main control system through the mounting hole; Wherein, the connecting ear is arranged coplanar with the first side wall or the second side wall where the mounting hole is located.

9. The battery management system according to claim 6, characterized in that: The top wall includes a first plane, a second plane, and a slope connected between the first plane and the second plane, wherein the distance between the first plane and the bottom plate is h1, and the distance between the second plane and the bottom plate is h2, satisfying: h1>h2; wherein the second circuit board is located in the area corresponding to the vertical projection of the second plane.

10. The battery management system according to any one of claims 1 to 9, characterized in that: One of every two adjacent first circuit boards is configured with a first vertical connector, and the other is configured with a second vertical connector, and the first vertical connector is electrically connected to the second vertical connector.

11. The battery management system according to claim 10, characterized in that: A third vertical connector is configured on a side of the second circuit board facing the first circuit board, a horizontal connector is configured on one of the first circuit boards, and the third vertical connector is electrically connected to the horizontal connector.

12. A battery pack, characterized in that: Comprising a battery management system as claimed in any one of claims 1 to 11.

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