Battery management system, battery and electric equipment

Abstract

The utility model relates to a battery management system, a battery and electric equipment. The battery management system comprises an electric connection structure, a circuit board and a battery sampler electrically connected with the circuit board. One end of the electric connection structure is used for being electrically connected with a battery cell of the battery, the other end of the electric connection structure is electrically connected with the circuit board, so that the battery can be electrically connected with the circuit board, and the electric connection structure is suitable for being electrically connected with the battery sampler through the circuit board. The battery and the circuit board are electrically connected through the electric connection structure, so that the battery can be electrically connected with the circuit board, the battery can be electrically connected with the battery sampler through the circuit board, and data of the battery can be conveniently provided for the battery sampler. According to the scheme provided by the invention, the use of a plurality of connecting pieces is avoided, the integration level of the battery management system can be improved, the cost of the battery management system can be reduced, the installation process is simplified, and the production efficiency of the battery management system is further improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of batteries, in particular to a battery management system, a battery and a power consumption device. BACKGROUND

[0002] A BMS (Battery Management System) is a system for monitoring and controlling a battery, which can feed back the collected battery information to a user in real time, and adjust parameters according to the collected information to fully exert the performance of the battery.

[0003] In the related art, the BMS needs to be connected with the battery for power supply and sampling respectively. The power supply connection is to connect the battery and the BMS through a separate connection copper bar, and the sampling connection is to connect the battery and the battery sampling connector of the BMS through a separate sampling wire harness. The connection pieces are various, the process is complex, and the cost is high. UTILITY MODEL CONTENT

[0004] The purpose of the present disclosure is to provide a battery management system, a battery and a power consumption device to solve the above technical problems.

[0005] In order to achieve the above purpose, as a first aspect of the present disclosure, the present disclosure provides a battery management system, comprising an electrical connection structure, a circuit board and a battery sampler electrically connected with the circuit board;

[0006] One end of the electrical connection structure is used to electrically connect with a battery cell, and the other end of the electrical connection structure is electrically connected with the circuit board, so that the battery cell can be electrically connected with the circuit board, and the electrical connection structure is adapted to be electrically connected with the battery sampler through the circuit board.

[0007] Optionally, the battery management system further comprises a battery management controller, the battery management controller is electrically connected with the circuit board, and the battery management controller is electrically connected with the battery sampler.

[0008] The battery management controller is integrated on the circuit board, or the battery management controller and the battery sampler are both integrated on the circuit board.

[0009] Optionally, one end of the electrical connection structure is welded with the battery cell, and / or the other end of the electrical connection structure is welded with the circuit board.

[0010] Optionally, the electrical connection structure comprises a first electrical connection piece, a second electrical connection piece and a plurality of tabs.

[0011] Each tab is electrically connected with a corresponding battery cell, one end of the first electrical connection piece is used to be welded with the tab of the battery cell, and the other end of the first electrical connection piece is welded with the circuit board, so that the battery cell is electrically connected with the circuit board.

[0012] One end of the second electrical connecting member is used for welding with a corresponding tab, and the other end of the second electrical connecting member is used for welding with the circuit board, so that the battery cell is electrically connected with the battery sampler through the second electrical connecting member and the circuit board.

[0013] Optionally, the first electrical connecting member has a first connecting part connected with the circuit board, and the second electrical connecting member has a second connecting part connected with the circuit board.

[0014] The current flow area of the first connecting part is greater than the current flow area of the second connecting part.

[0015] Optionally, the first connecting part includes a first pin, and the circuit board is provided with a first mounting hole, and the first pin is welded to the first mounting hole; and / or,

[0016] The second electrical connecting member includes a second pin, and the circuit board is provided with a second mounting hole, and the second pin is welded to the second mounting hole.

[0017] Optionally, the first pin includes a plurality of connecting columns, and the number of the first mounting holes is a plurality.

[0018] The plurality of connecting columns are respectively welded to the corresponding first mounting holes; and / or, the second pin includes a connecting sheet, and the connecting sheet is welded to the second mounting hole.

[0019] Optionally, the cross section of the connecting column is rectangular, and the first mounting hole is a rectangular hole with a cross section size and shape matched with the connecting column.

[0020] Optionally, the first electrical connecting member further includes a first main body part, and the second electrical connecting member further includes a second main body part, and the first main body part and the second main body part are respectively used for electrical connection with a corresponding tab.

[0021] Optionally, the first main body part and the second main body part are both plate-shaped members.

[0022] The thickness of the first main body part is greater than the thickness of the second main body part.

[0023] Optionally, the electrical connecting structure includes a plurality of tabs.

[0024] One end of each tab is electrically connected with a corresponding battery cell, and the other end of each tab is welded with the circuit board, so that the battery cell can be electrically connected with the circuit board and can be electrically connected with the battery sampler through the circuit board.

[0025] Optionally, the battery management system also includes external terminals disposed on the circuit board for supplying power to external sources and / or communicating with external systems.

[0026] As a second aspect of this disclosure, this disclosure provides a battery, including a casing, a cell, and the aforementioned battery management system;

[0027] The housing has a receiving cavity, and the battery cell and battery management system are both located within the receiving cavity.

[0028] Optionally, the housing includes a main housing and a cover disposed at an opening in the main housing, the cover and the main housing together defining the receiving cavity;

[0029] The cover is provided with a connector, which is sleeved on the outside of the external terminal on the circuit board for supplying power to the outside and / or communicating with the outside.

[0030] Optionally, the connecting seat is integrally formed into the cover.

[0031] Optionally, the battery is a battery for starting a motor or engine of a vehicle.

[0032] As a third aspect of this disclosure, this disclosure provides an electrical appliance including the battery described above.

[0033] The above technical solution, employing an electrical connection structure to electrically connect the battery cell and the circuit board, not only achieves electrical connection between the battery cell and the circuit board, but also allows the battery to be electrically connected to the battery sampler via the circuit board, facilitating the provision of battery data to the sampler. Compared to related technologies that use screws and connecting copper busbars to electrically connect the battery and the battery management system, or use sampling harnesses to connect the battery and the battery management system, the solution provided in this disclosure helps avoid using multiple connectors, improves the integration of the battery management system, reduces the cost of the battery management system, simplifies the installation process, and further improves the production efficiency of the battery management system.

[0034] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0035] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0036] Figure 1 This is a perspective view of a battery provided according to one embodiment of the present disclosure;

[0037] Figure 2This is an exploded view of a battery provided in one embodiment of the present disclosure, in which the battery management system is shown;

[0038] Figure 3 This is a perspective view of a battery provided according to one embodiment of the present disclosure, wherein the cover and circuit board are not shown;

[0039] Figure 4 yes Figure 3 Enlarged view of section A;

[0040] Figure 5 This is a perspective view of a battery provided according to another embodiment of the present disclosure, wherein the cover is not shown.

[0041] Explanation of reference numerals in the attached figures

[0042] 100-Battery Management System; 200-Battery; 201-Housing; 2011-Main Housing; 2012-Cover; 2013-Connector; 2014-Mounting Bracket; 202-Cell; 203-Taper; 1-Electrical Connection Structure; 11-First Electrical Connector; 111-First Connecting Part; 112-First Pin; 1121-Connecting Post; 113-First Main Body; 12-Second Electrical Connector; 121-Second Connecting Part; 122-Second Pin; 1221-Connecting Piece; 123-Second Main Body; 2-Circuit Board; 21-First Mounting Hole; 22-Second Mounting Hole; 23-Through Hole; 3-External Terminal; 4-Battery Sampler; 5-Battery Management Controller. Detailed Implementation

[0043] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0044] In this disclosure, unless otherwise stated, directional terms such as "upper" and "lower" are generally defined based on the state of the vehicle in normal driving. They are used only for the convenience of describing this disclosure and for simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational construction and operation, and therefore should not be construed as a limitation of this disclosure. "Inner" and "outer" refer to the inside and outside of the outline of the corresponding component. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0045] In the description of this disclosure, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "connect," "link," and "install" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0046] As a first aspect of this disclosure, such as Figures 1 to 5 As shown, this disclosure provides a battery management system 100, including an electrical connection structure 1, a circuit board 2, and a battery sampler 4 electrically connected to the circuit board 2.

[0047] One end of the electrical connection structure 1 is used for electrical connection with the cell 202 of the battery 200, and the other end of the electrical connection structure 1 is electrically connected to the circuit board 2 so that the cell 202 can be electrically connected to the circuit board 2, and the electrical connection structure 1 is adapted to be electrically connected to the battery sampler 4 through the circuit board 2.

[0048] Through the above technical solution, the battery cell 202 and the circuit board 2 are electrically connected using the electrical connection structure 1. This not only enables the electrical connection between the battery cell 202 and the circuit board 2, but also allows the battery cell 202 to be electrically connected to the battery sampler 4 via the circuit board 2, thereby facilitating the provision of data from the battery cell 202 to the battery sampler 4. Compared to related technologies that use screws and connecting copper busbars to electrically connect the battery cell and the battery management system, or use sampling harnesses to connect the battery cell and the battery management system, the solution provided in this disclosure helps to avoid using multiple connectors, improves the integration of the battery management system 100, reduces the cost of the battery management system 100, simplifies the installation process, and further improves the production efficiency of the battery management system 100.

[0049] Here, it can be understood that the battery sampler 4 can be a sampling structure used to sample values ​​such as voltage, current, and temperature of the battery cell 202. The sampled data can then be used to display the status of the battery cell 202 to monitor the battery's operating condition at any time. The battery sampler 4 can be one of a battery sampling chip, a Hall sensor, or a shunt. The battery sampling chip is used to collect voltage and temperature data of the battery cell 202, while the Hall sensor and the shunt are used to sample current data of the battery cell 202.

[0050] Optionally, the battery management system 100 may further include a battery management controller 5, which is electrically connected to the circuit board 2 and to the battery sampler 4.

[0051] The battery management controller 5 is integrated on the circuit board 2, or the battery management controller 5 and the battery sampler 4 are both integrated on the circuit board 2.

[0052] The battery management controller 5 and the battery sampler 4 are integrated on the circuit board 2. The circuit board 2 is electrically connected to the battery cell 202 via the electrical connection structure 1. This allows the battery management controller 5 and the battery sampler 4 to obtain data from the battery cell 202 and control the battery cell 202 based on the data. For example, this enables functions such as CAN communication between the battery and the outside world, mechanical wake-up, anti-sparking, and control of battery power supply. This further improves the integration of the battery management system 100.

[0053] In embodiments where both the battery management controller 5 and the battery sampler 4 are integrated on the circuit board 2, the battery management controller 5 and the battery sampler 4 can be arranged at different locations on the circuit board 2, while being electrically connected through circuits on the circuit board 2. Alternatively, as... Figure 2 and Figure 5 As shown, the battery management controller 5 and the battery sampler 4 can also be integrated into a single chip. That is, a single chip can be used to perform data sampling of the battery cell 202 and battery management and control functions, further improving the integration of the battery management system 100. Furthermore, by integrating power supply, battery sampling, and battery management functions all onto the circuit board 2, the structure of the battery management system 100 can be further simplified, and manufacturing costs can be reduced.

[0054] This disclosure does not limit the electrical connection method between the electrical connection structure 1 and the battery cell 202 and the circuit board 2. For example, the two ends of the electrical connection structure 1 can be bonded to the battery cell 202 and the circuit board 2 respectively by conductive adhesive. Since the conductive adhesive has conductivity and fixing effect, the battery cell 202 and the circuit board 2 can be bonded to the electrical connection structure 1 respectively by adhesive, which can reduce the types of connectors and improve production efficiency.

[0055] In another embodiment provided in this disclosure, such as Figure 1 As shown, one end of the electrical connection structure 1 is welded to the battery cell 202, and / or the other end of the electrical connection structure 1 is welded to the circuit board 2. The two ends of the electrical connection structure 1 are welded to the circuit board 2 and the battery cell 202 respectively. Compared to the method used in related technologies that employs multiple connecting copper busbars, screws, and sampling harnesses to connect the battery cell and the battery management system, this reduces the cost of the battery management system 100, simplifies the installation process, and further improves the production efficiency of the battery management system 100.

[0056] Optionally, such as Figure 2As shown, the electrical connection structure 1 includes a first electrical connector 11, a second electrical connector 12, and multiple tabs 203. Each tab 203 is electrically connected to a corresponding battery cell 202. One end of the first electrical connector 11 is used to solder to the corresponding tab 203, and the other end of the first electrical connector 11 is soldered to the circuit board 2, so that the battery cell 202 is electrically connected to the circuit board 2. One end of the second electrical connector 12 is used to solder to the corresponding tab 203, and the other end of the second electrical connector 12 is used to solder to the circuit board 2, so that the battery cell 202 is electrically connected to the battery sampler 4 through the second electrical connector 12 and the circuit board 2.

[0057] A first electrical connector 11 is used to connect the circuit board 2 to the battery cell tab 203 for power supply, and a second electrical connector 12 is used to connect the circuit board 2 and the battery cell tab 203 for sampling, so that the relevant data of the battery cell 202 can be transmitted to the battery sampler 4. This configuration, while simplifying the structure as much as possible, allows the power supply and sampling connection of the battery cell 202 to be electrically connected to the circuit board 2 through different electrical connectors, thereby enabling the battery management system 100 to better manage and utilize the battery cell 202.

[0058] In the above embodiments, the tab 203 can be the tab of the internal core of the battery cell 202, or it can be the external connection terminal of the battery cell 202, such as the positive terminal or the negative terminal.

[0059] To ensure the proper use of different electrical connections, optionally, such as Figure 3 and Figure 4 As shown, the first electrical connector 11 has a first connection portion 111 connected to the circuit board 2, and the second electrical connector 12 has a second connection portion 121 connected to the circuit board 2. The current-carrying area of ​​the first connection portion 111 is larger than the current-carrying area of ​​the second connection portion 121.

[0060] Because the current flowing through the electrical connectors differs between the power supply connection and the sampling connection, the first electrical connector 11 connects the battery cell tab 203 and the circuit board 2 for power supply, while the second electrical connector 12 connects the battery cell tab 203 and the circuit board 2 for sampling. Therefore, when the battery management system 100 is operating, the current flowing through the first electrical connector 11 is greater than the current flowing through the second electrical connector 12. Thus, setting the current-carrying area of ​​the first connection portion 111 to be larger than that of the second connection portion 121 better meets the requirement of the first electrical connector 11 for large current flow. Conversely, setting the current-carrying area of ​​the second electrical connector 12 to be smaller allows for a reduction in the volume of the second electrical connector 12 while still meeting its current requirements, thereby reducing the cost of the battery management system 100.

[0061] To facilitate the connection between the electrical connector and circuit board 2, optionally, as follows: Figure 2 andFigure 4 As shown, the first connecting part 111 includes a first pin 112, and a first mounting hole 21 is provided on the circuit board 2; and / or, the second electrical connector 12 includes a second pin 122, and a second mounting hole 22 is provided on the circuit board 2, with the second pin 122 soldered to the second mounting hole 22.

[0062] The first pin 112 is soldered to the first mounting hole 21. Soldering the first pin 112 to the first mounting hole 21 on the circuit board 2 facilitates the positioning of the first pin 112 on the circuit board 2 and can improve installation efficiency.

[0063] This disclosure does not limit the specific connection method between the first pin 112 and the first mounting hole 21. The first pin 112 can be inserted into the first mounting hole 21 and then soldered; the first pin 112 can also be inserted into the first mounting hole 21 and then soldered to the circuit on the other side of the circuit board 2; the first pin 112 can also be directly soldered to the opening of the first mounting hole 21.

[0064] like Figure 2 and Figure 4 As shown, the second pin 122 is soldered to the second mounting hole 22 on the circuit board 2, which facilitates the positioning of the second pin 122 on the circuit board 2 and can improve the installation efficiency.

[0065] The present disclosure does not limit the specific connection method between the second pin 122 and the second mounting hole 22. The second pin 122 can be inserted into the second mounting hole 22 first and then soldered; the second pin 122 can also be inserted into the second mounting hole 22 and then soldered to the circuit on the other side of the circuit board 2; the second pin 122 can also be directly soldered to the opening of the second mounting hole 22.

[0066] It should be noted that, in order to facilitate the installation and connection of the first pin 112 and the first mounting hole 21, as well as the second pin 122 and the second mounting hole 22, mounting gaps can be set between the first pin 112 and the first mounting hole 21, and between the second pin 122 and the second mounting hole 22. On the one hand, mounting gaps can be reserved during the processing to allow for more tolerances in the processing; on the other hand, space can be reserved for welding metals (such as copper and tin) to ensure the strength of the weld.

[0067] Optionally, the installation gap can be 0.2mm.

[0068] This disclosure does not limit the specific structure of the first pin 112. In one embodiment provided in this disclosure, such as Figure 2 and Figure 4As shown, the first pin 112 includes a plurality of connecting posts 1121, and the number of first mounting holes 21 is plurality of, with the plurality of connecting posts 1121 respectively soldered to the corresponding first mounting holes 21; and / or, the second pin 122 includes a connecting piece 1221, with the connecting piece 1221 soldered to the second mounting hole 22.

[0069] Multiple connecting posts 1121 are welded to the corresponding first mounting holes 21. On the one hand, this facilitates the positioning and connection of the first pin 112 with the first mounting hole 21 during installation. On the other hand, the arrangement of multiple connecting posts 1121 can increase the current carrying area of ​​the first pin 112, thereby better meeting the needs of the first electrical connector 11 to carry large currents.

[0070] like Figure 4 As shown, since the second electrical connector 12 is a structure used to electrically connect the cell tab 203 to the battery sampler 4, the current through the second electrical connector 12 is relatively small. The second pin 122 is set as a connecting piece 1221. On the one hand, the structure of the connecting piece 1221 is simpler, which can reduce the processing difficulty of the second pin 122. On the other hand, the thickness of the connecting piece 1221 is also easier to adjust, so as to obtain a second pin 122 with a smaller current carrying area.

[0071] In another embodiment provided in this disclosure, the first pin 112 may include a first connecting piece, and the first mounting hole 21 may be a rectangular hole that is adapted to the shape and size of the first connecting piece.

[0072] This disclosure does not limit the specific shape of the connecting post 1121, and the cross-section of the connecting post 1121 can be circular, triangular or rectangular.

[0073] In one embodiment provided in this disclosure, such as Figure 2 and Figure 4 As shown, the cross-section of the connecting post 1121 is rectangular, and the first mounting hole 21 is a rectangular hole whose cross-sectional size and shape are adapted to the connecting post 1121. The mating of the rectangular connecting post 1121 and the rectangular hole not only allows for quick positioning during installation, but also allows the edges of the rectangular connecting post 1121 to abut against the inner wall of the rectangular hole, thereby preventing the connecting post 1121 from rotating within the rectangular hole. This further restricts the range of motion of the first pin 112 and increases the firmness of the connection between the first electrical connector 11 and the circuit board 2.

[0074] To further meet the usage scenarios of the first electrical connector 11 and the second electrical connector 12, optionally, such as Figure 3 and Figure 4As shown, the first electrical connector 11 further includes a first main body portion 113, and the second electrical connector 12 further includes a second main body portion 123. The first main body portion 113 and the second main body portion 123 are respectively used for electrical connection with the corresponding tab 203. The first main body portion 113 can be connected to the first connecting portion 111, and the second main body portion 123 can be connected to the second connecting portion 121. Since the first connecting portion 111 can be connected to the circuit board 2, the first main body portion 113 can be electrically connected to the tab 203, thereby connecting the tab 203 to the circuit board 2 for power supply through the first main body portion 113 and the first connecting portion 111. Since the second connecting portion 121 can be connected to the circuit board 2, the second main body portion 123 can be electrically connected to the tab 203, thereby connecting the tab 203 to the circuit board 2 through the second main body portion 123 and the second connecting portion 121, thereby connecting the battery cell 202 of the battery 200 to the battery sampler 4.

[0075] This disclosure does not limit the connection method between the first main body 113 and the first connecting part 111, and between the second main body 123 and the second connecting part 121. The first main body 113 and the first connecting part 111 can be welded together or integrally formed, and the second main body 123 and the second connecting part 121 can be welded together or integrally formed.

[0076] Optionally, such as Figure 3 and Figure 4 As shown, both the first main body 113 and the second main body 123 are plate-shaped, and the thickness of the first main body 113 is greater than the thickness of the second main body 123. Since the first electrical connector 11 is used to connect the battery cell tab 203 and the circuit board 2 for power supply, and the second electrical connector 12 is used to connect the battery cell tab 203 and the circuit board 2 for sampling, the current flowing through the first electrical connector 11 is greater than the current flowing through the second electrical connector 12 when the battery management system 100 is working. Therefore, the thickness of the first main body 113 is set to be greater than the thickness of the second main body 123, so that the current-carrying area of ​​the first main body 113 is greater than the current-carrying area of ​​the second main body 123. This better meets the requirement of the first electrical connector 11 for large current flow, while the current-carrying area of ​​the second electrical connector 12 is smaller, which allows for a reduction in the volume of the second electrical connector 12 while still meeting its current requirements, thereby reducing the cost of the battery management system 100.

[0077] Optionally, such as Figure 5As shown, the electrical connection structure 1 may include multiple tabs 203. One end of each tab 203 is electrically connected to a corresponding battery cell 202 (it can be welded to the battery cell 202 or integrally formed with the current collector inside the battery cell 202). The other end of each tab 203 is welded to a circuit board 2, so that the battery cell 202 can be electrically connected to the circuit board 2, and can be electrically connected to the battery sampler 4 through the circuit board 2. By directly welding the tabs 203 to the circuit board 2, the battery cell 202 can simultaneously achieve power supply and sampling connections with the circuit board 2 through the tabs 203. Compared with the related technology that uses multiple connecting copper busbars, screws, and sampling harnesses to connect the battery cell 202 and the battery management system 100, the cost of the battery management system 100 can be reduced, the installation process can be simplified, and the production efficiency of the battery management system 100 can be further improved.

[0078] In the above embodiments, the tab 203 can be the tab of the internal core of the battery cell 202, or it can be the external connection terminal of the battery cell 202, such as the positive terminal or the negative terminal.

[0079] Furthermore, in the embodiment where the battery sampler 4 and the battery manager 5 are integrated on the circuit board 2, the structure of the battery management system 100 can be further simplified and the manufacturing cost reduced by integrating all functions such as power supply, battery sampling and battery management on the circuit board 2.

[0080] Optionally, such as Figure 5 As shown, the circuit board 2 can also be provided with multiple vias 23, and multiple tabs 203 are provided one-to-one with multiple vias 23. The vias 23 are used to allow the tabs 203 to pass through, so as to electrically connect the battery cell 202 located on the other side of the circuit board 2 to the circuit board 2.

[0081] This disclosure does not limit the specific material of the electrical connection structure 1. For example, the electrical connection structure 1 can be made of copper, aluminum, or nickel. In one embodiment provided in this disclosure, the first electrical connector 11 is a copper busbar, and / or the second electrical connector 12 is a copper busbar. That is, both the first electrical connector 11 and the second electrical connector 12 can be copper busbars, or one of them can be a copper busbar and the other can be made of other metals.

[0082] To improve the ease of connection between the battery management system 100 and external systems, optionally, such as Figure 2As shown, the battery management system 100 also includes an external terminal 3, which is disposed on the circuit board 2 and used for supplying power to the outside and / or communicating. After the battery cell 202 is electrically connected to the circuit board 2 of the battery management system 100 through the electrical connection structure 1, it can supply power to the outside or communicate with the outside through the external terminal 3, or simultaneously supply power to the outside and communicate with the outside through the external terminal 3. This reduces the number of connectors connecting the battery management system 100 to the outside, further simplifies the connection method, and improves the efficiency and convenience of the connection.

[0083] As a second aspect of this disclosure, such as Figure 2 and Figure 3 As shown, this disclosure also provides a battery 200, including a housing 201, a battery cell 202, and the aforementioned battery management system 100. The housing 201 has a receiving cavity, within which both the battery cell 202 and the battery management system 100 are located. Placing the battery management system 100 and the battery cell 202 within the housing 201 protects the battery cell 202 and the circuit board 2, while also fulfilling the requirement for integrated battery 200.

[0084] Here, it is understood that the aforementioned cell 202 can be at least one battery cell, which can be a hard-case battery or a pouch battery; this disclosure does not limit this. The cell 202 includes a casing and an internal electrode core, with the casing having a receiving cavity for accommodating the electrode core. The electrode core is composed of a positive electrode sheet, a negative electrode sheet, and a separator wound or stacked. In embodiments where the electrical connection structure 1 of the battery management system 100 includes a tab 203, the tab 203 can be the tab of the electrode core, or it can be the positive or negative tab of the cell 202. Furthermore, in embodiments where the electrical connection structure 1 of the battery management system 100 includes a tab 203, the at least one battery cell can also be a battery cell without tabs; in other words, in this case, the battery cell can use the tab 203 of the battery management system 100 as its own battery tab.

[0085] Optionally, such as Figure 2 and Figure 1As shown, the housing 201 includes a main housing 2011 and a cover 2012 disposed at the opening of the main housing 2011. The cover 2012 and the main housing 2011 together define a receiving cavity. A connecting seat 2013 is provided on the cover 2012. The connecting seat 2013 is sleeved on the outside of the external terminal 3 on the circuit board 2 for supplying power to the outside and / or communicating with the outside. The external terminal 3 can be connected to the outside through a connector, thereby enabling the battery 200 to supply power to the outside or communicate with the outside. Sleeving the connecting seat 2013 on the outside of the external terminal 3 can, on the one hand, protect the external terminal 3 from damage by force when it is not connected to the outside connector; on the other hand, the connecting seat 2013 can also be adapted to the external connector and snapped into the connector, thereby fixing the connector in the connecting seat 2013 and ensuring a stable connection between the battery 200 and the outside.

[0086] Optionally, such as Figure 2 As shown, the housing 201 also includes a mounting bracket 2014 connected to the housing 201. The mounting bracket 2014 is disposed between the circuit board 2 and the battery cell. Multiple through holes are formed on the mounting bracket 2014, through which the battery cell tabs 203 can pass and connect to the electrical connection structure 1. Two first electrical connectors 11 are spaced apart along the width direction of the mounting bracket 2014, and two second electrical connectors 12 are spaced apart along the width direction of the mounting bracket 2014. The electrical connection structure 1 can be disposed on the mounting bracket 2014 to electrically connect the tabs 203 to the circuit board 2.

[0087] Optionally, such as Figure 3 As shown, there are multiple first electrical connectors 11 and multiple second electrical connectors 12. Two first electrical connectors 11 are spaced apart along the width direction of the mounting frame 2014, and a second electrical connector 12 is disposed between two adjacent first electrical connectors 11. The other two second electrical connectors 12 are spaced apart from the first electrical connectors 11 along the length direction of the mounting frame 2014, and these two second electrical connectors 12 are also spaced apart along the width direction of the mounting frame 2014.

[0088] Since the battery cells 202 are arranged in the receiving cavity along the width direction of the housing 201, and the tabs 203 are arranged along the width direction of the housing 201 in an alternating positive and negative manner, and adjacent positive and negative tabs 203 are connected, so that multiple battery cells 202 form a series structure. Two first electrical connectors 11 are respectively connected to the positive and negative terminals of the series-connected battery cells 202 to supply power to the outside; the second electrical connectors 12 are respectively connected to the positive and negative terminals of each battery cell 202 to transmit the status of the battery cells 202 to the battery management system 100.

[0089] In related technologies, the external terminals and the housing used to protect the external terminals are integrated on the circuit board. The battery cover has through holes for the external terminals and the housing to pass through. In addition, to ensure a seal, sealant is applied between the housing and the cover, which increases the processing difficulty and processing cost.

[0090] In view of this, such as Figure 2 As shown, the connector 2013 can be integrally formed into the cover 2012. Since there is no gap between the connector 2013 and the cover 2012, the use of sealant can be reduced while protecting the external terminal 3 and the connection to the outside world, thus lowering the manufacturing cost and assembly difficulty of the battery 200. Furthermore, the separate housing 201 for fixing the external terminal 3 can be eliminated, further reducing manufacturing costs.

[0091] During the installation process, the battery cell 202 can first be soldered to the electrical connection structure 1. Then, a first mounting hole 21 and a second mounting hole 22 are made on the circuit board 2, so that the shapes of the first mounting hole 21 and the second mounting hole 22 match the shapes of the first pin 112 and the second pin 122. The two are then connected and fixed by selective wave soldering / other soldering processes. At this time, the sampling signal is directly connected to the circuit board 2 through the second pin 122. After soldering is completed, the cover 2012 is installed at the opening of the main housing 2011.

[0092] In the embodiment where the tab 203 is directly soldered to the circuit board 2, the tab 203 can pass through the through hole 23 opened on the circuit board 2, and then be directly connected to the circuit board 2 by processes such as laser soldering / laser soldering. After soldering, the cover 2012 is installed at the opening of the main housing 2011.

[0093] Alternatively, the battery 200 can be a battery 200 for starting a motor or engine of the vehicle.

[0094] As a third aspect provided by this disclosure, this disclosure provides an electrical device including the aforementioned battery 200. Here, the electrical device can be a vehicle, mobile phone, portable device, laptop computer, ship, spacecraft, electric toy, and power tool, etc. Vehicles can be gasoline-powered vehicles, natural gas-powered vehicles, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc.; spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc., and this disclosure does not limit the scope of these.

[0095] Alternatively, when the electrical device is a vehicle, the battery pack can be installed on the vehicle body.

[0096] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0097] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0098] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A battery management system, characterized in that, Includes an electrical connection structure, a circuit board, and a battery sampler electrically connected to the circuit board; One end of the electrical connection structure is used for electrical connection with the battery cell, and the other end of the electrical connection structure is electrically connected to the circuit board, so that the battery cell can be electrically connected to the circuit board, and the electrical connection structure is adapted to be electrically connected to the battery sampler through the circuit board.

2. The battery management system according to claim 1, characterized in that, The battery management system further includes a battery management controller, which is electrically connected to the circuit board and to the battery sampler. The battery management controller is integrated on the circuit board, or both the battery management controller and the battery sampler are integrated on the circuit board.

3. The battery management system according to claim 1, characterized in that, One end of the electrical connection structure is welded to the battery cell, and / or the other end of the electrical connection structure is welded to the circuit board.

4. The battery management system according to claim 3, characterized in that, The electrical connection structure includes a first electrical connector, a second electrical connector, and multiple electrodes; Each electrode is electrically connected to a corresponding battery cell. One end of the first electrical connector is used to be soldered to the corresponding electrode, and the other end of the first electrical connector is soldered to the circuit board, so that the battery cell is electrically connected to the circuit board. One end of the second electrical connector is used for welding to the corresponding tab, and the other end of the second electrical connector is used for welding to the circuit board, so that the battery cell is electrically connected to the battery sampler through the second electrical connector and the circuit board.

5. The battery management system according to claim 4, characterized in that, The first electrical connector has a first connection portion that connects to the circuit board, and the second electrical connector has a second connection portion that connects to the circuit board; The current-carrying area of ​​the first connection part is greater than that of the second connection part.

6. The battery management system according to claim 5, characterized in that, The first connection portion includes a first pin, and the circuit board has a first mounting hole, to which the first pin is soldered; and / or, The second electrical connector includes a second pin, and the circuit board has a second mounting hole, to which the second pin is soldered.

7. The battery management system according to claim 6, characterized in that, The first pin includes multiple connecting posts, and the number of the first mounting holes is multiple; The plurality of connecting posts are respectively welded to the corresponding first mounting holes; and / or, The second pin includes a connecting tab, which is soldered to the second mounting hole.

8. The battery management system according to claim 7, characterized in that, The cross-section of the connecting column is rectangular, and the first mounting hole is a rectangular hole whose cross-sectional size and shape are adapted to the connecting column.

9. The battery management system according to any one of claims 4-8, characterized in that, The first electrical connector further includes a first main body portion, and the second electrical connector further includes a second main body portion, wherein the first main body portion and the second main body portion are respectively used for electrical connection with corresponding tabs.

10. The battery management system according to claim 9, characterized in that, Both the first main body and the second main body are plate-shaped components; The thickness of the first main body is greater than the thickness of the second main body.

11. The battery management system according to claim 1, characterized in that, The electrical connection structure includes multiple electrodes; One end of each tab is connected to the corresponding battery cell, and the other end of each tab is soldered to the circuit board, so that the battery cell can be electrically connected to the circuit board and can be electrically connected to the battery sampler through the circuit board.

12. The battery management system according to any one of claims 1-8 and 11, characterized in that, The battery management system also includes external terminals, which are disposed on the circuit board and are used to supply power to the outside world and / or communicate.

13. A battery, characterized in that, Includes a housing, a battery cell, and a battery management system according to any one of claims 1-12; The housing has a receiving cavity, and the battery cell and battery management system are both located within the receiving cavity.

14. The battery according to claim 13, characterized in that, The housing includes a main housing and a cover disposed at an opening in the main housing, the cover and the main housing together defining the receiving cavity; The cover is provided with a connector, which is sleeved on the outside of the external terminal on the circuit board for supplying power to the outside and / or communicating with the outside.

15. The battery according to claim 14, characterized in that, The connector is integrally formed into the cover.

16. The battery according to any one of claims 13-15, characterized in that, The battery is a battery used to start the motor or engine of the vehicle.

17. An electrical appliance, characterized in that, The battery included in any one of claims 13-16.

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