Battery management device, power battery pack and power utilization system

Abstract

The utility model provides a battery management device, a power battery pack and a power utilization system, the battery management device comprises a shell, a fastener and a circuit board arranged in the shell; the shell is provided with a first fixing part, the circuit board is provided with a second fixing part, and the fastener is respectively connected with the first fixing part and the second fixing part in a matching manner, so that the shell is fixedly connected with the circuit board and the battery pack box body. Therefore, through the cooperative connection of the fastener, the first fixing part on the shell and the second fixing part on the circuit board, the fixed connection of the shell and the circuit board and the fixed connection of the shell and the battery pack box body can be directly realized, compared with the prior art, the installation steps and the installation mode of the battery management device are simplified, and the installation efficiency is improved. And the installation efficiency of the battery management device can be improved.

Description

Technical Field

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

[0002] As an important component of power batteries, the battery management device can realize intelligent management of batteries, prevent overcharging and over-discharging of batteries, extend the service life of batteries, monitor the status of batteries, collect battery information and provide real-time feedback to users, and adjust parameters according to the collected information to give full play to the performance of batteries. The battery management device includes a housing and a circuit board arranged in the housing. The functions of the battery management device mainly rely on the circuit board, and the housing protects the circuit board.

[0003] Regarding the installation and fixation of the battery management device, in the prior art, the circuit board is usually first fixedly connected to the shell, and then the entire device is fixed in the battery pack box. The entire installation method is complicated, resulting in a cumbersome installation process of the battery management device and low installation efficiency. Utility Model Content

[0004] In view of this, the utility model provides a battery management device, a power battery pack and a power system, so as to at least solve the problems of the existing battery management device having a complex installation process and low installation efficiency.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] The utility model provides a battery management device, comprising a housing, a fastener and a circuit board arranged in the housing;

[0007] The shell is provided with a first fixing portion, the circuit board is provided with a second fixing portion, and the fastener is respectively cooperated with the first fixing portion and the second fixing portion to fix the shell to the circuit board and to fix the shell to the battery pack case.

[0008] Optionally, the first fixing portion is a first through hole, the second fixing portion is a second through hole, and the fastener is passed through the first through hole and the second through hole to fix the shell to the circuit board and to fix the shell to the battery pack case.

[0009] Optionally, the first through hole and the second through hole are coaxially arranged.

[0010] Optionally, a pressing member is further provided in the housing, and the pressing member is used to press the circuit board.

[0011] Optionally, along a direction perpendicular to the circuit board, a projection of the first through hole is located within a projection of the holding member;

[0012] A third through hole is provided in the holding member, and the fastener is passed through the first through hole, the second through hole and the third through hole to fix the shell to the circuit board and to fix the shell to the battery pack case.

[0013] Optionally, the end surface of the pressing member for pressing the circuit board is provided with a protrusion, and the third through hole passes through the protrusion;

[0014] The protrusion extends in a direction close to the circuit board and passes through the second through hole to fix the circuit board in the housing.

[0015] Optionally, the holding member comprises an inner column and an outer column, the inner column is inserted into the outer column, and the third through hole is provided in the inner column;

[0016] The end surface of the outer column abuts against the circuit board to press the circuit board;

[0017] The inner column passes through the second through hole to fix the circuit board in the housing.

[0018] Optionally, the shell is a rectangular shell, and there are at least two pressing members, at least two of which are distributed at corners and / or sides of the shell, and each of the pressing members corresponds to one of the first through hole and the second through hole.

[0019] Optionally, the housing comprises an upper shell and a lower shell;

[0020] The upper shell is detachably connected to the lower shell, and the pressing member is fixedly connected to the upper shell or the pressing member is fixedly connected to the lower shell.

[0021] Optionally, the upper shell is provided with a first buckling portion, and the lower shell is provided with a second buckling portion;

[0022] The first buckling portion is buckled with the second buckling portion to detachably connect the upper shell and the lower shell.

[0023] Optionally, the lower shell is provided with a support member;

[0024] The supporting member and the pressing member are arranged on two opposite sides of the circuit board, and the supporting member is used for supporting the circuit board.

[0025] Optionally, the support member is provided with a fourth through hole, and the fastener is passed through the first through hole, the second through hole, the third through hole and the fourth through hole to fix the shell to the circuit board and to fix the shell to the battery pack case.

[0026] Optionally, the support member is a conductor.

[0027] Optionally, a limit member is provided on the inner wall of the lower shell, and the limit member abuts against the side of the circuit board.

[0028] Optionally, a shielding portion is further provided on a side of the upper shell facing the lower shell, and the shielding portion abuts against a connector on the circuit board.

[0029] Optionally, the lower shell is provided with a plurality of support members and reinforcement members, and the reinforcement member is located between two adjacent support members.

[0030] Optionally, the inner wall of the shell is provided with reinforcing ribs.

[0031] The utility model also provides a power battery pack, comprising a battery assembly, a battery pack box and a battery management device as described in any one of the above;

[0032] The battery assembly and the battery management device are arranged in the battery pack case, the shell is fixedly connected to the battery pack case, and the circuit board is electrically connected to the battery assembly.

[0033] The utility model also provides an electricity system, including the above-mentioned power battery pack.

[0034] Compared with the prior art, the battery management device, power battery pack and power system described in the utility model have the following advantages:

[0035] The battery management device of the utility model can directly realize the fixed connection between the housing and the circuit board and the fixed connection between the housing and the battery pack box through the cooperation connection of the fastener with the first fixing part on the housing and the second fixing part on the circuit board. Compared with the prior art, the installation steps and installation methods of the battery management device are greatly simplified, which helps to improve the installation efficiency of the battery management device. At the same time, the number of installation holes opened on the housing in the prior art can be significantly reduced, thereby simplifying the processing technology of the housing, improving the overall strength of the housing and the waterproof and dustproof effect of the housing.

[0036] The power battery pack and power system of the present invention have the same or similar advantages as the prior art and the aforementioned battery management device, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0038] Figure 1 This is a structural explosion diagram of a battery management device in an embodiment of the utility model;

[0039] Figure 2 It is a schematic diagram of the outer side of an upper shell in an embodiment of the utility model;

[0040] Figure 3 It is a schematic diagram of the inner side of an upper shell in an embodiment of the utility model;

[0041] Figure 4 It is a schematic diagram of the inner side of a lower shell in an embodiment of the utility model;

[0042] Figure 5 It is a schematic diagram of the outer side of a lower shell in an embodiment of the utility model;

[0043] Figure 6 It is a top view of a lower shell in an embodiment of the utility model;

[0044] Figure 7 It is a cross-sectional schematic diagram of a lower shell in an embodiment of the utility model;

[0045] Figure 8 It is a schematic diagram of the appearance of a battery management device in an embodiment of the utility model.

[0046] Description of reference numerals:

[0047] 1-shell, 10-first through hole, 11-upper shell, 110-first buckling part, 12-lower shell, 120-second buckling part, 2-circuit board, 20-second through hole, 3-fastener, 4-pressing member, 40-third through hole, 41-protrusion, 21-connector, 5-support member, 6-reinforcement member, 7-limiting member, 8-shielding part, 9-reinforcement rib. DETAILED DESCRIPTION

[0048] 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 part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0049] The terms "first", "second", etc. in the specification and claims of the present utility model are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the utility model can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0050] It should be understood that the reference to "some embodiments" throughout the specification means that specific features, structures or characteristics related to the embodiments are included in at least one embodiment of the utility model. Therefore, the "in some embodiments" appearing in various places throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

[0051] The following describes in detail a battery management device, a power battery pack and a power system provided by the utility model by listing specific embodiments.

[0052] Reference Figure 1 The battery management device provided by the utility model includes a shell 1, a fastener 3 and a circuit board 2 arranged in the shell 1; the shell 1 is provided with a first fixing part, the circuit board 2 is provided with a second fixing part, and the fastener 3 is respectively cooperated with the first fixing part and the second fixing part to fix the shell 1 and the circuit board 2 and to fix the shell 1 and the battery pack case.

[0053] Specifically, the circuit board 2 is the core component of the battery management device. The circuit board 2 is essentially a PCB (Printed Circuit Board). The circuit board 2 is provided with various electronic components such as resistors, capacitors, chips, and multiple integrated circuits. The various electronic components are electrically connected to the integrated circuits, and the battery components can be monitored and managed. The circuit board 2 is arranged in the shell 1. The shell 1 can protect the circuit board 2 and prevent external water vapor, dust, etc. from entering the shell 1 and adhering to the circuit board 2, causing corrosion of the circuit board 2 and affecting its service life. The shell 1 usually includes an upper shell 11 and a lower shell 12. The lower shell 12 has a receiving cavity for accommodating the circuit board 2. During the installation of the battery management device, the circuit board 2 is first placed in the receiving cavity of the lower shell 12, and then the upper shell 11 and the lower shell 12 are fixedly connected to form a closed shell 1 to protect the circuit board 2 in the shell 1.

[0054] The housing 1 is provided with a first fixing portion, the circuit board 2 is provided with a second fixing portion, and the fastener 3 is respectively connected with the first fixing portion and the second fixing portion, so that the housing 1 can be fixedly connected with the circuit board 2 and the battery pack case, that is, the battery management device can be installed and fixed in the battery pack case. Among them, the first fixing portion can penetrate the housing 1, so as to simultaneously realize the fixed connection between the housing 1, the circuit board 2 and the battery pack case. Of course, the upper shell 11 of the housing 1 can be fixedly connected with the circuit board 2 and the battery pack case, and the lower shell 12 of the housing 1 can be fixedly connected with the circuit board 2 and the battery pack case. It is also possible to make the upper shell 11 and the lower shell 12 of the housing 1 fixedly connected with the circuit board 2 and the battery pack case at the same time, depending on the design requirements of the battery management device.

[0055] The battery management device of the utility model can directly realize the fixed connection between the housing 1 and the circuit board 2 and the fixed connection between the housing 1 and the battery pack box through the fastener 3 and the first fixing part on the housing 1 and the second fixing part on the circuit board 2. Compared with the prior art, the installation steps and installation methods of the battery management device are greatly simplified, which helps to improve the installation efficiency of the battery management device. At the same time, the number of installation holes opened on the housing in the prior art can be significantly reduced, thereby simplifying the processing technology of the housing 1, improving the overall strength of the housing 1 and the waterproof and dustproof effect of the housing 1.

[0056] Optionally, refer to Figure 1 , Figure 6 and Figure 7 The first fixing portion is a first through hole 10, the second fixing portion is a second through hole 20, and the fastener 3 is passed through the first through hole 10 and the second through hole 20 to fix the shell 1 to the circuit board 2 and to fix the shell 1 to the battery pack case.

[0057] Specifically, in this embodiment, the first fixing portion and the second fixing portion are both set to the form of through holes, the first fixing portion is the first through hole 10, the second fixing portion is the second through hole 20, the fastener 3 can be in the form of screws, bolts, rivets, etc., one end of the fastener 3 is inserted into the first through hole 10 and the second through hole 20, and the other end is inserted into the mounting hole of the battery pack case, so as to realize the fixed connection between the shell 1 and the circuit board 2 and the fixed connection between the shell 1 and the battery pack case. In some preferred embodiments, the first through hole 10 and the second through hole 20 can be set as threaded holes, and the fastener 3 is tightened in the threaded holes, so as to improve the reliability of the connection between the first through hole 10 and the second through hole 20 and the fastener 3. In some preferred embodiments, the first through hole 10 and the second through hole 20 can be coaxially arranged, that is, the axes of the first through hole 10 and the second through hole 20 are located on the same straight line, so as to facilitate the insertion of the fastener 3 and avoid the fastener 3 from being stuck during the insertion process, thereby ensuring the smooth connection between the shell 1 and the circuit board 2 and the battery pack case.

[0058] Optionally, refer to Figures 1 to 3 A pressing member 4 is disposed in the housing 1 , and the pressing member 4 is used to press the circuit board 2 .

[0059] Specifically, if Figures 1 to 3 As shown, a pressing member 4 is also provided in the housing 1, and the pressing member 4 is used to press the circuit board 2 to achieve the pre-positioning of the circuit board 2 in the housing 1, and to avoid excessive displacement, dislocation, etc. of the circuit board 2. The pressing member 4 can be set as a columnar structure, such as a cylindrical or prism shape, and avoid being set as a cone structure. The cone structure will make sharp contact with the circuit board 2, resulting in stress concentration, and it is easy to crush the pressing member 4. In some preferred embodiments, a flexible pad can be provided on the end surface of the pressing member 4 for pressing the circuit board 2. The flexible pad can be any one or more materials such as a silicone pad, a rubber pad, a foam pad, a resin pad, etc. The flexible pad can be bonded to the end surface of the end of the pressing member 4, and a slot can be provided on the end surface of the pressing member 4, and the flexible pad is clamped in the slot to achieve the fixation of the flexible pad. The existence of the flexible pad can play an elastic buffering role in the process of the pressing member 4 pressing the circuit board 2, avoiding the sudden pressing force or excessive pressing force causing the circuit board 2 to break, damage, etc., thereby ensuring the structural integrity of the circuit board 2 during the pressing process.

[0060] Optionally, refer to Figures 1 to 3 , along the direction perpendicular to the circuit board 2, the projection of the first through hole 10 is located within the projection of the holding member 4; a third through hole 40 is provided in the holding member 4, and the fastener 3 is penetrated through the first through hole 10, the second through hole 20 and the third through hole 40 to fix the shell 1 to the circuit board 2 and to fix the shell 1 to the battery pack case.

[0061] Specifically, along the direction perpendicular to the circuit board 2, the projection of the first through hole 10 is located within the projection of the holding member 4, and the holding member 4 is provided with a third through hole 40, so that the fastener 3 passes through the first through hole 10, the second through hole 20 and the third through hole 40, and the housing 1 is fixedly connected with the circuit board 2 and the battery pack body. In some preferred embodiments, the first through hole 10, the second through hole 20 and the third through hole 40 can be coaxially arranged, that is, the axes of the first through hole 10, the second through hole 20 and the third through hole 40 are located on the same straight line, so as to facilitate the installation of the fastener 3 and avoid the fastener 3 from getting stuck during the installation process, thereby ensuring the smooth connection between the housing 1 and the circuit board 2 and the battery pack body.

[0062] Optionally, refer to Figure 2 and Figure 3 The end surface of the pressing member 4 for pressing the circuit board 2 is provided with a protrusion 21, and the third through hole 40 passes through the protrusion 21; the protrusion 21 extends in a direction close to the circuit board 2 and passes through the second through hole 20 to fix the circuit board 2 in the housing 1.

[0063] Specifically, in some embodiments, the end face of the pressing member 4 for pressing the circuit board 2 is provided with a protrusion 21, and the protrusion 21 and the pressing member 4 are an integrally processed structure with good overall stability and high reliability. The third through hole 40 on the pressing member 4 passes through the protrusion 21, that is, when the shell 1 is connected to the battery pack body by the fastener 3, the fastener 3 will simultaneously pass through the pressing member 4 and the third through hole 40 on the protrusion 21 on the end face of the pressing member 4. In some preferred embodiments, the protrusion 21 can be formed in the central area of ​​the end face of the pressing member 4 to enhance the stability of the pressing member 4. The protrusion 21 extends along the axial direction of the pressing member 4 and passes through the second through hole 20 on the circuit board 2. After the protrusion 21 passes through the second through hole 20, the circuit board 2 can be pre-positioned in the shell 1, so that the position of the circuit board 2 in the shell 1 is relatively fixed, which helps to achieve the alignment of the positions of the second through hole 20 and the third through hole 40, and facilitates the smooth passage of the subsequent fastener 3.

[0064] Optionally, the holding member 4 includes an inner column and an outer column, the inner column is inserted into the outer column, and the third through hole 40 is arranged on the inner column; the end face of the outer column abuts against the circuit board 2 for holding the circuit board 2; the inner column passes through the second through hole 20 to fix the circuit board 2 in the shell 1.

[0065] Specifically, in some other embodiments, the holding member 4 is a double-layer structure, also a split structure, and the holding member 4 includes an inner column and an outer column, the inner column is inserted into the outer column, and the inner column and the outer column can be interference-fitted together, and no relative movement occurs between the two. The axial dimension of the inner column is greater than the axial dimension of the outer column, and the third through hole 40 is provided in the inner column. During the installation process, the end face of the outer column abuts against the surface of the circuit board 2 to hold the circuit board 2, and the inner column passes through the second through hole 20 on the circuit board 2 to achieve pre-positioning of the circuit board 2 in the housing 1, so that the position of the circuit board 2 in the housing 1 is relatively fixed, which helps to achieve the alignment of the positions of the second through hole 20 and the third through hole 40, and facilitates the smooth passage of the subsequent fastener 3.

[0066] Optionally, refer to Figures 1 to 3 The shell 1 is a rectangular shell, and there are at least two pressing members 4. At least two pressing members 4 are distributed at the corners and / or edges of the shell 1, and each of the pressing members 4 corresponds to one of the first through hole 10 and the second through hole 20.

[0067] Specifically, usually, the circuit board 2 is a rectangular structure, so the housing 1 is also adaptively set to a rectangular structure, there are at least two pressing members 4, and at least two pressing members 4 are evenly distributed at the corners and / or sides of the housing 1. When at least two pressing members 4 are evenly distributed, the distance between two adjacent pressing members 4 is the same or close. Exemplarily, if there are two pressing members 4, the two pressing members 4 can be distributed at two corners of a diagonal line of the housing 1. If there are three pressing members 4, the two pressing members 4 can be distributed at three corners of the housing 1, or on three sides of the housing 1. Figures 1 to 3 The figure shows a configuration in which four pressing members 4 are respectively arranged at four corners of the rectangular shell 1, and each pressing member 4 corresponds to a first through hole 10 on the shell 1 and a second through hole 20 on the circuit board 2, so that the fastener 3 realizes a fixed connection between the shell and the circuit board 2 and the battery pack body through the four corners, which can avoid occupying the effective use space of the circuit board 2 and ensure the stability of the shell 1 and the reliability of the connection between them.

[0068] Optionally, refer to Figure 1 The housing 1 includes an upper shell 11 and a lower shell 12; the upper shell 11 is detachably connected to the lower shell 12, and the holding member 4 is fixedly connected to the upper shell 11 or the holding member 4 is fixedly connected to the lower shell 12.

[0069] Specifically, if Figure 1As shown, the housing 1 is composed of an upper shell 11 and a lower shell 12, and the upper shell 11 and the lower shell 12 are detachably connected by bolts, screws, etc., so as to facilitate the installation of the circuit board 2 and the inspection and maintenance of the upper shell 11 or the lower shell 12. In this embodiment, first through holes 10 are respectively provided on the upper shell 11 and the lower shell 12, and the size of the fastener 3 is relatively long, and it can pass through the first through holes 10 on the upper shell 11 and the lower shell 12 at the same time. The lower shell 12 has a receiving cavity for installing the circuit board 2, and the pressing member 4 can be fixedly connected to the upper shell 11 or the lower shell 12. After the circuit board 2 is installed in the receiving cavity of the lower shell 12, the upper shell 11 and the lower shell 12 are fixedly connected together. After the upper shell 11 and the lower shell 12 are fixedly connected, the pressing member 4 will press on the surface of the circuit board 2, and play a pre-fixing role on the circuit board 2. In this embodiment, the holding member 4 and the upper shell 11 or the lower shell 12 can be plastic parts that are integrally injected, that is, the holding member 4 and the upper shell 11 are an integral structure, or the holding member 4 and the lower shell 12 are an integral structure; or, the holding member 4 can also be a metal member, which is welded together with the upper shell 11 or the lower shell 12; or, a threaded hole is opened on the upper shell 11 or the lower shell 12, and a thread is set on the outer wall of the holding member 4, so that the holding member 4 and the upper shell 11 or the lower shell 12 are threadedly connected together.

[0070] Optionally, refer to Figures 1 to 5 The upper shell 11 is provided with a first buckling portion 110, and the lower shell 12 is provided with a second buckling portion 120; the first buckling portion 110 is buckled with the second buckling portion 120 to detachably connect the upper shell 11 and the lower shell 12.

[0071] Specifically, the upper shell 11 is provided with a first buckling portion 110, and the lower shell 12 is provided with a second buckling portion 120. The first buckling portion 110 and the second buckling portion 120 are buckled together, so that the upper shell 11 and the lower shell 12 can be pre-fixed. When the shell 1 needs to be installed on the battery pack body, it is realized by passing the fastener 3 through the first through hole 10 on the shell 1, the second through hole 20 on the circuit board 2, and the third through hole 40 on the holding member 4. In this embodiment, one of the first buckling portion 110 and the second buckling portion 120 can be a hook, and the other can be a slot or a through hole. The hook is clamped in the slot or the through hole to achieve the buckling of the first buckling portion 110 and the second buckling portion 120. Of course, the first buckling portion 110 and the second buckling portion 120 can also be other buckling forms, and the specific form is not limited in this embodiment.

[0072] Optionally, refer to Figure 4 The lower shell 12 is provided with a support member 5 ; the support member 5 and the holding member 4 are arranged on opposite sides of the circuit board 2 , and the support member 5 is used to support the circuit board 2 .

[0073] Specifically, if Figure 4As shown, the lower shell 12 is provided with a support member 5, and the support member 5 and the holding member 4 are arranged on opposite sides of the circuit board 2. The support member 5 is used to support the circuit board 2, so that the circuit board 2 is clamped between the holding member 4 and the support member 5, thereby limiting the movement of the circuit board 2 in the vertical direction, and realizing the pre-positioning of the circuit board 2 in the housing 1. The support member 5 can be a cylindrical structure, a prismatic structure or any irregular columnar structure, and its specific structural shape is not limited in this embodiment. In some preferred embodiments, a flexible pad can be arranged on the end surface of the support member 5 for supporting the circuit board 2. The flexible pad can be any one or more materials such as a silicone pad, a rubber pad, a foam pad, a resin pad, etc. The flexible pad can be bonded to the end surface of the support member 5, or it can be clamped on the end surface of the support member 5. The existence of the flexible pad can play an elastic buffering role when the support member 5 supports the circuit board 2, so as to avoid the sudden impact force when the circuit board 2 is installed, causing the circuit board 2 to be broken, damaged, etc.

[0074] Optionally, the support member 5 is provided with a fourth through hole, and the fastener is passed through the first through hole 10, the second through hole 20, the third through hole 40 and the fourth through hole to fix the shell 1 to the circuit board 2 and to fix the shell 1 to the battery pack case.

[0075] Specifically, a fourth through hole is provided in the support member 5, and the fourth through hole is coaxially arranged with the first through hole 10, the second through hole 20 and the third through hole 40. One end of the fastener 3 is sequentially penetrated in the first through hole 10, the second through hole 20, the third through hole 40 and the fourth through hole, and the other end is penetrated in the mounting hole of the battery pack case, thereby fixing the housing 1 with the circuit board 2 and the battery pack case. In some embodiments, the fourth through hole can also be set as a threaded hole to improve the reliability of the connection between the fourth through hole and the fastener 3.

[0076] In some preferred embodiments, Figure 4As shown, the lower shell 12 is provided with a plurality of support members 5 and a reinforcing member 6, and the reinforcing member 6 is located between two adjacent support members 5. Specifically, when the distance between two adjacent support members 5 is relatively far, for example, two adjacent support members 5 are respectively arranged at the corners of the lower shell 12, the supporting capacity of the circuit board 2 is relatively weak. If the circuit board 2 cannot be effectively supported, it will be greatly deformed under its own gravity or under the impact of external force. If the deformation is too large, the electronic components on the circuit board 2 will be damaged. Therefore, in this embodiment, a reinforcing member 6 can also be arranged in the lower shell 12, and the reinforcing member 6 is arranged between two adjacent support members 5. The reinforcing member 6 is also used to support the circuit board 2 to strengthen the supporting capacity of the circuit board 2 and avoid sagging deformation in the middle part of the circuit board 2. The number of reinforcing members 6 can be determined according to the distance between two adjacent support members 5. If the distance is large, multiple reinforcing members 6 can be arranged to ensure stable support for the circuit board 2. If the distance is small, a small number of reinforcing members 6 can be arranged to control the cost and the total weight of the housing 1. Different from the supporting member 5 , the reinforcing member 6 has no through hole therein and only serves to support the circuit board 2 .

[0077] Optionally, the support member 5 is a conductor.

[0078] Specifically, the support member 5 is a conductor. Of course, the reinforcement member 6 can also be a conductor. In some embodiments, the support member 5 and the reinforcement member 6 can be made of metal or alloy materials, have a certain rigidity, and have good conductivity. The support member 5 and the reinforcement member 6 with wire properties are in contact with the circuit board 2, and the equipotential connection between the circuit board 2 and the shell 1 can be achieved. The shell 1 is connected to the battery pack box, which is equivalent to achieving the grounding of the circuit board 2, thereby ensuring the safe use of the battery management device.

[0079] Optionally, refer to Figure 4 A limiting member 7 is disposed on the inner wall of the lower shell 12 , and the limiting member 7 abuts against the side of the circuit board 2 .

[0080] Specifically, if Figure 4As shown, the limit member 7 is arranged on the inner wall of the lower shell 12 and is located on the side wall. After the circuit board 2 is installed in the lower shell 12, the limit member 7 abuts against the side of the circuit board 2. The side of the circuit board 2 refers to the side of the circuit board 2 along its thickness direction. It can be understood that the side area of ​​the circuit board 2 along its thickness direction is smaller, and the surface area of ​​the circuit board 2 along the direction perpendicular to its thickness is larger, that is, the surface area of ​​the circuit board 2 along the horizontal direction is larger, and the integrated circuit is arranged on this surface. The limit member 7 abuts against the side of the circuit board 2 to limit the movement of the circuit board 2 in the horizontal direction. The limit member 7 can be an independent component, which is welded or fixedly connected to the inner wall of the lower shell 12. The limit member 7 can be a rib structure protruding from the inner wall of the lower shell 12. The specific form is not limited in this embodiment. The number of limit members 7 is determined according to the size specifications of the shell 1. Figure 4 Each side wall of the middle shell 1 is provided with three to four limiting members 7 . In some preferred embodiments, a limiting member 7 may be provided at the location of each reinforcement member 6 to provide reliable support and limiting effects for the circuit board 2 .

[0081] Optionally, refer to Figures 1 to 3 A shielding portion 8 is further provided on one side of the upper shell 11 facing the lower shell 12 , and the shielding portion 8 abuts against the connector 21 on the circuit board 2 .

[0082] Specifically, if Figure 1 As shown, a connector 21 is provided at the edge of the circuit board 2. The connector 21 is an interface for inputting and outputting information of the circuit board 2. The connector 21 includes a plurality of connection interfaces, which are arranged at intervals. A shielding portion 8 is provided on the side of the upper shell 11 facing the lower shell 12. The position of the shielding portion 8 corresponds to the position of the connector 21 on the circuit board 2. The shielding portion 8 can be clamped between two adjacent connection interfaces and abut against the side of the connection interface to shield the gap between the two adjacent connection interfaces, so as to prevent foreign impurities and dust from entering the housing 1 from the gap between the connector ports, so as to meet the IP level requirements of the housing 1, and also prevent personnel from accidentally touching the circuit board 2 inside the housing 1, so as to protect the safety of personnel. After the upper shell 11 and the lower shell 12 are installed, when the upper shell 11 is under pressure, the shielding portion 8 can also contact the circuit board 2, and play a supporting role for the upper shell 11, so as to prevent the upper shell 11 from having excessive deformation.

[0083] Optionally, refer to Figure 3 The inner wall of the shell 1 is provided with reinforcing ribs 9.

[0084] Specifically, in order to ensure the rigidity of the shell 1, a plurality of reinforcing ribs 9 may be provided on the inner wall of the shell 1 to prevent the shell 1 from excessive deformation. In addition, a metal coating such as conductive paint may be sprayed on the outer wall of the shell 1 to achieve electromagnetic shielding of the shell 1, while the inner wall is not sprayed with a metal coating to maintain the electrical insulation properties between the inner wall of the shell 1 and the circuit board 2, thereby ensuring the safety of the battery management device. In some embodiments, the shell 1 may be a plastic shell 1, which has a certain elastic deformation, which can not only avoid damage to the internal circuit board 2, but also adapt to the temperature changes of the battery pack body to avoid excessive temperature rise.

[0085] The utility model also provides a power battery pack, comprising a battery assembly, a battery pack case and a battery management device as described in any of the above items; the battery assembly and the battery management device are arranged in the battery pack case, the shell 1 is fixedly connected to the battery pack case, and the circuit board 2 is electrically connected to the battery assembly.

[0086] Specifically, the power battery pack includes a battery assembly, a battery pack case and the battery management device of the aforementioned embodiment. The battery assembly and the battery management device are both arranged in the battery pack case. A threaded hole is provided on the battery pack case. After the fastener 3 passes through the first through hole 10 on the shell 1 and the second through hole 20 on the circuit board 2, the shell 1 of the battery management device is fixedly connected to the battery pack case. At the same time, the circuit board 2 of the battery management device is electrically connected to the battery assembly in the battery pack case to realize monitoring and management of the battery assembly.

[0087] The utility model also provides an electricity consumption system, comprising the aforementioned power battery pack.

[0088] Specifically, the power consumption system includes energy storage devices and electric vehicles, the energy storage devices include energy storage cabinets, control cabinets, integrated cabinets, etc., the electric vehicles include pure electric vehicles and hybrid vehicles, and the power battery pack of the aforementioned embodiment is installed on the power consumption system. The power battery pack has a simple structure, reliable strength, and good protection effect, which helps to improve the endurance of the power consumption system.

[0089] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0090] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery management device, characterized in that: It includes a housing, a fastener, and a circuit board arranged in the housing; The shell is provided with a first fixing portion, the circuit board is provided with a second fixing portion, and the fastener is respectively cooperated with the first fixing portion and the second fixing portion to fix the shell to the circuit board and to fix the shell to the battery pack case.

2. The battery management device according to claim 1, characterized in that: The first fixing portion is a first through hole, the second fixing portion is a second through hole, and the fastener is passed through the first through hole and the second through hole to fix the shell to the circuit board and to fix the shell to the battery pack case.

3. The battery management device according to claim 2, characterized in that: The first through hole and the second through hole are coaxially arranged.

4. The battery management device according to claim 2, characterized in that: A pressing member is also arranged in the shell, and the pressing member is used for pressing the circuit board.

5. The battery management device according to claim 4, characterized in that: Along a direction perpendicular to the circuit board, a projection of the first through hole is located within a projection of the holding member; A third through hole is provided in the holding member, and the fastener is passed through the first through hole, the second through hole and the third through hole to fix the shell to the circuit board and to fix the shell to the battery pack case.

6. The battery management device according to claim 5, characterized in that: The end surface of the pressing member for pressing the circuit board is provided with a protrusion, and the third through hole passes through the protrusion; The protrusion extends in a direction close to the circuit board and passes through the second through hole to fix the circuit board in the housing.

7. The battery management device according to claim 5, characterized in that: The holding member comprises an inner column and an outer column, the inner column is inserted into the outer column, and the third through hole is arranged in the inner column; The end surface of the outer column abuts against the circuit board to press the circuit board; The inner column passes through the second through hole to fix the circuit board in the housing.

8. The battery management device according to claim 5, characterized in that: The shell is a rectangular shell, and there are at least two pressing members, at least two of which are distributed at corners and / or edges of the shell, and each of the pressing members corresponds to one of the first through hole and the second through hole.

9. The battery management device according to claim 5, characterized in that: The housing comprises an upper shell and a lower shell; The upper shell is detachably connected to the lower shell, and the pressing member is fixedly connected to the upper shell or the pressing member is fixedly connected to the lower shell.

10. The battery management device according to claim 9, characterized in that: The upper shell is provided with a first buckling portion, and the lower shell is provided with a second buckling portion; The first buckling portion is buckled with the second buckling portion to detachably connect the upper shell and the lower shell.

11. The battery management device according to claim 9, characterized in that: The lower shell is provided with a support member; The supporting member and the pressing member are arranged on two opposite sides of the circuit board, and the supporting member is used for supporting the circuit board.

12. The battery management device according to claim 11, characterized in that: The support member is provided with a fourth through hole, and the fastener is passed through the first through hole, the second through hole, the third through hole and the fourth through hole to fix the shell to the circuit board and to fix the shell to the battery pack case.

13. The battery management device according to claim 11, characterized in that: The support member is a conductor.

14. The battery management device according to claim 9, characterized in that: The inner wall of the lower shell is provided with a limiting member, and the limiting member abuts against the side of the circuit board.

15. The battery management device according to claim 9, characterized in that: A shielding portion is further provided on one side of the upper shell facing the lower shell, and the shielding portion abuts against the connector on the circuit board.

16. The battery management device according to claim 11, characterized in that: The lower shell is provided with a plurality of support members and reinforcement members, and the reinforcement member is located between two adjacent support members.

17. The battery management device according to claim 16, characterized in that: The inner wall of the shell is provided with reinforcing ribs.

18. A power battery pack, characterized in that: Comprising a battery assembly, a battery pack box and a battery management device according to any one of claims 1 to 17; The battery assembly and the battery management device are arranged in the battery pack case, the shell is fixedly connected to the battery pack case, and the circuit board is electrically connected to the battery assembly.

19. An electricity system, characterized in that: Including the power battery pack as described in claim 18.

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