Battery modules and battery systems

Abstract

The present application provides a battery module and a battery system. The battery module is used to be stacked with another battery module, and the battery module includes a shell, a common busbar, a positive connector, a top post and a mechanical switch. The common busbar, the positive connector, the negative connector, the top post and the mechanical switch are all arranged in the shell. Among them, when the battery module is stacked with another battery module, the second end of the common busbar of the battery module is connected to the first end of the common busbar of the other battery module, the negative connector of the battery module is connected to the positive connector of the other battery module, and the mechanical switch of the battery module is disconnected by the top post of the other battery module. The present application can automatically achieve electrical connection when stacking through the provision of the common busbar, the positive connector, the negative connector, the top post and the mechanical switch, reducing the need for external wiring to improve flexibility and reduce costs.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of electronic circuit technology, and in particular to a battery module and a battery system. Background Art

[0002] A typical battery stack system consists of a control module, several battery modules, and a base. The control module includes a BMS (Battery Management System) and corresponding switches. The battery modules contain battery cells and their corresponding control systems. The battery modules have external positive and negative connectors and a main negative connector. The base includes a structure that can short-circuit the main negative connector and the negative connector of the battery modules.

[0003] This solution requires a base to complete the system. From a structural cost perspective, the base needs to be a sturdy structure capable of bearing the weight of the entire battery pack and equipped with connectors for docking with the module. This places high demands on material selection and processing technology, driving up production costs. From a maintenance perspective, the presence of the base increases system complexity. If a problem with the base arises, such as poor connector contact or structural damage, not only is troubleshooting difficult, but replacing the base is also cumbersome, extending maintenance time and increasing costs. Summary of the Invention

[0004] Embodiments of the present application provide a battery module and a battery system that can eliminate the need for a base when stacking battery modules, thereby improving flexibility and reducing costs.

[0005] In a first aspect, an embodiment of the present application provides a battery module, which is used to be stacked with another battery module, and the battery module includes: a shell; a common busbar, the common busbar is provided in the shell, the first end of the common busbar is exposed to the first side of the shell, and the second end of the common busbar is exposed to the second side of the shell; a positive connector, the positive connector is provided in the shell, the positive connector is exposed to the first side of the shell, and the positive connector is used to connect the positive pole of the battery pack; a negative connector, the negative connector is provided in the shell, and the negative connector is exposed to the second side of the shell , the negative connector is used to connect the negative electrode of the battery pack; the top post, the top post is provided in the shell, and the top post protrudes from the first side of the shell; the mechanical switch, the mechanical switch is provided on the second side inside the shell, and the mechanical switch connects the common busbar to the negative connector; wherein, when the battery module is stacked with another battery module, the second end of the common busbar of the battery module is connected to the first end of the common busbar of the other battery module, the negative connector of the battery module is connected to the positive connector of the other battery module, and the mechanical switch of the battery module is disconnected by the top post of the other battery module.

[0006] In some embodiments, the first side of the housing is disposed opposite to the second side of the housing.

[0007] In some embodiments, the mechanical switch includes: a first static contact, the first static contact is connected to the common busbar; a second static contact, the second static contact is connected to the negative connector; a moving contact, the moving contact abuts against the first static contact and the second static contact; the moving contact is used to be pushed by the top column of another battery module when the battery module is stacked with another battery module, so as to disconnect the connection between the moving contact and the first static contact and / or the connection between the moving contact and the second static contact.

[0008] In some embodiments, the mechanical switch further includes: a center column, the center column being connected to the moving contact, the center column being arranged between the first static contact and the second static contact; the center column being used to be pushed by the top column of the other battery module when the battery module is stacked with another battery module to disconnect the connection between the moving contact and the first static contact and / or the connection between the moving contact and the second static contact.

[0009] In some embodiments, the first side of the top post is opposite to the center post, the second side of the center post is opposite to the top post, the first side of the positive connector is opposite to the negative connector, and the second side of the negative connector is opposite to the positive connector; wherein the distance between the first side of the top post and the second side of the center post is greater than the distance between the first side of the positive connector and the second side of the negative connector.

[0010] In some embodiments, the battery module further includes: a connection detection module, the connection detection module is arranged in the shell, the first end of the connection detection module is exposed to the first side of the shell, and the connection detection module is connected to the negative pole connector; the connection detection module is used to output a connection detection signal during the process of connecting the second side of the battery module with the first side of another battery module, and during the process of disconnecting the second side of the battery module from the first side of another battery module.

[0011] In some embodiments, the connection detection module includes: a first signal connector, the first signal connector is provided in the shell, the first signal connector is exposed on the first side of the shell, and the first signal connector is used to connect to the control module; a second signal connector, the second signal connector is provided in the shell, and the second signal connector is connected to the first signal connector; a diode D1, the positive pole of the diode D1 is connected to the connection point between the first signal connector and the second signal connector, and the negative pole of the diode D1 is connected to the negative pole connector of the battery module; wherein, when the battery module is stacked with another battery module, the second signal connector of the battery module is connected to the first signal connector of the other battery module.

[0012] In some embodiments, the first side of the first signal connector is opposite to the second signal connector, and the second side of the second signal connector is opposite to the first signal connector; wherein the distance between the first side of the first signal connector and the second side of the second signal connector is smaller than the distance between the first side of the positive connector and the second side of the negative connector.

[0013] In a second aspect, an embodiment of the present application provides a battery system, comprising: at least two battery modules as described above, wherein the at least two battery modules are stacked.

[0014] In some embodiments, the battery system further includes: a control module, which is stacked with the at least two battery modules; the control module is used to receive a connection detection signal output by the battery module to determine the connection status of the at least two battery modules.

[0015] Different from existing solutions, the present invention provides a battery module and battery system. The battery module is designed to be stacked with another battery module and includes a housing, a common busbar, a positive connector, a negative connector, a top post, and a mechanical switch. Traditional battery module series connection requires complex external wiring or a base. However, this battery module, through the common busbar, positive connector, negative connector, top post, and mechanical switch, automatically achieves electrical connection when stacked, reducing the need for external wiring, complexity, and cost. The top post and mechanical switch work together to automatically achieve series connection and switch state switching when the battery modules are stacked, eliminating the need for complex circuit connections and switch operations, improving the convenience and reliability of battery module series connection. The mechanical switch is designed to be closed when the battery modules are not stacked and automatically open when stacked, reducing potential safety issues such as short circuits during the series connection process and improving the safety of the battery modules during the series connection process. Multiple battery modules can be easily stacked in series, allowing users to flexibly increase or decrease the number of battery modules according to actual voltage requirements, achieving flexible adjustment of the battery pack voltage and providing good scalability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily illustrated by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0017] Figure 1 This is a schematic structural diagram of a battery module provided in an embodiment of the present application;

[0018] Figure 2 This is a schematic structural diagram of another battery module provided in an embodiment of the present application;

[0019] Figure 3 This is a structural diagram of another battery module provided in an embodiment of the present application;

[0020] Figure 4 Schematic diagram of three distances in a battery module provided in an embodiment of the present application;

[0021] Figure 5 This is a schematic structural diagram of a battery system provided in an embodiment of the present application;

[0022] Figure 6 This is a schematic structural diagram of another battery system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and in detail below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0024] The technical features involved in the various embodiments of the present application described below do not conflict with each other and can be combined with each other.

[0025] When an element is referred to as being “connected to” another element, it can be directly connected to the other element, or one or more intervening elements may be present therebetween.

[0026] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "first," "second," and the like generally distinguish objects of a class and do not limit the number of objects. For example, the first object may be one or more.

[0027] See also Figure 1 , Figure 1 1 is a schematic structural diagram of a battery module 100 provided in an embodiment of the present application.

[0028] The embodiment of the present application provides a battery module 100, which is used to connect to another battery module ( Figure 1 The battery module 100 includes a housing 11, a common busbar 21, a positive electrode connector 31, a negative electrode connector 41, a top column 51, and a mechanical switch 61.

[0029] Among them, the common busbar 21 is provided in the shell 11, the first end of the common busbar 21 is exposed to the first side of the shell 11, and the second end of the common busbar 21 is exposed to the second side of the shell 11. The positive connector 31 is provided in the shell 11, the positive connector 31 is exposed to the first side of the shell 11, and the positive connector 31 is used to connect the positive pole of the battery pack 71. The negative connector 41 is provided in the shell 11, the negative connector 41 is exposed to the second side of the shell 11, and the negative connector 41 is used to connect the negative pole of the battery pack 71. The top column 51 is provided in the shell 11, and the top column 51 protrudes from the first side of the shell 11. The mechanical switch 61 is provided on the second side inside the shell 11, and the mechanical switch 61 connects the common busbar 21 with the negative connector 41.

[0030] Among them, the battery module 100 and another battery module ( Figure 1When stacking (not shown), the second end of the common busbar 21 of the battery module 100 is connected to the common busbar of another battery module ( Figure 1 The first end of the battery module 100 is connected to the positive connector of another battery module ( Figure 1 Not shown), the mechanical switch 61 of the battery module 100 is connected to the top post of another battery module ( Figure 1 (not shown) disconnected.

[0031] In addition, the battery pack 71 can be a component of the battery module 100 or a component independently provided from the battery module 100 , depending on specific requirements.

[0032] In practical applications, the battery module 100 has two working states, one is a single battery module state, and the other is a multiple battery module stacking state.

[0033] When the battery module 100 is in a single battery module state:

[0034] When the battery module 100 is not stacked with other battery modules, the mechanical switch 61 is closed. At this point, the common busbar 21 is connected to the negative connector 41 via the mechanical switch 61. The positive connector 31 of the battery module 100 is connected to the positive terminal of the battery pack 71, and the negative connector 41 is connected to the negative terminal of the battery pack 71, forming a complete battery power supply circuit. The battery module 100 can operate normally and provide power to the load (not shown).

[0035] When the battery module 100 is in a stacked state:

[0036] When the battery module 100 is stacked with another battery module, the second end of the common busbar 21 of the battery module 100 is connected to the common busbar 21 of the other battery module ( Figure 1 At the same time, the negative electrode connector 41 of the battery module 100 is connected to the positive electrode connector ( Figure 1 The top column of another battery module ( Figure 1 The mechanical switch 61 of the battery module 100 (not shown) is squeezed, disconnecting it. This action changes the internal circuit connection of the battery module 100, connecting multiple stacked battery modules in series. As the number of battery modules connected in series increases, the voltage of the entire battery pack also increases, meeting higher voltage requirements in applications.

[0037] In this embodiment, the battery module 100 is stacked with another battery module below as an example. The principle of stacking with another battery module above the battery module 100 is similar and will not be described in detail here.

[0038] In some embodiments, the first side of the housing 11 is disposed opposite to the second side of the housing 11 .

[0039] The housing 11 in the accompanying drawings is a rectangular parallelepiped, and the accompanying drawings show a cross-section of the housing 11. The upper side of the housing 11 in the accompanying drawings is its first side, and the lower side of the housing 11 is its second side. The upper end of each component in the accompanying drawings is its first end, and the lower end of each component is its second end.

[0040] It should be noted that the housing 11 can be configured as a cube, a cylinder, etc. according to actual needs.

[0041] In other embodiments, the first side of the housing 11 and the second side of the housing 11 may be arranged vertically, or at other angles, depending on actual needs.

[0042] See also Figure 2 , Figure 2 1 is a schematic structural diagram of another battery module 100 provided in an embodiment of the present application.

[0043] In some embodiments, as Figure 2 As shown, the battery module 100 further includes a connection detection module 81 . The connection detection module 81 is disposed in the housing 11 , with a first end of the connection detection module 81 exposed to a first side of the housing 11 , and the connection detection module 81 is connected to the negative electrode connector 41 .

[0044] Specifically, the connection detection module 81 is used to connect the second side of the battery module 100 to another battery module ( Figure 2 (not shown) and in the process of connecting the second side of the battery module 100 to another battery module ( Figure 2 During the disconnection of the first side (not shown), a connection detection signal is output.

[0045] In actual use, when the second side of the battery module 100 approaches and begins to connect with the first side of another battery module, the connection detection module 81 will sense the physical proximity or contact change. Because one end of the connection detection module 81 is exposed to the first side of the housing 11 and the other end is connected to the negative connector 41, this physical change will cause the circuit state within the connection detection module 81 to change, such as triggering the internal switch element to conduct or changing the parameters of components such as resistors and capacitors, thereby generating an electrical signal change. This changed electrical signal is output as the connection detection signal, thereby indicating that the two battery modules are undergoing a connection operation.

[0046] When the second side of the battery module 100 is disconnected from the first side of another battery module, the connection detection module 81 will also sense this change in physical separation, causing the internal circuit state to change again, resulting in the electrical signal also changing accordingly, and outputting the connection detection signal again to indicate that the two battery modules are undergoing a disconnection operation.

[0047] See also Figure 3 , Figure 3 1 is a structural diagram of another battery module 100 provided in an embodiment of the present application.

[0048] In some embodiments, as Figure 3 As shown, the mechanical switch 61 includes a first static contact 611, a second static contact 612, and a movable contact 613. The first static contact 611 is connected to the common busbar 21. The second static contact 612 is connected to the negative connector 41. The movable contact 613 abuts against the first static contact 611 and the second static contact 612.

[0049] Specifically, the moving contact 613 is used to connect the battery module 100 with another battery module ( Figure 3 When stacked, the top column ( Figure 3 not shown) to disconnect the movable contact 613 from the first stationary contact 611 and / or the movable contact 613 from the second stationary contact 612.

[0050] The first static contact 611 , the second static contact 612 and the movable contact 613 are all made of conductive metal materials.

[0051] In actual use, when the battery module 100 is stacked with another battery module, the top post of the other battery module will contact the mechanical switch 61. Specifically, the top post of the other battery module pushes the movable contact 613, disconnecting the movable contact 613 from the first static contact 611 and / or disconnecting the movable contact 613 from the second static contact 612. This disconnects the electrical connection between the common busbar 21 and the negative connector 41 in the battery module 100.

[0052] In some embodiments, as Figure 3 As shown, the mechanical switch 61 further includes a center column 614 , wherein the center column 614 is connected to the movable contact 613 and is disposed between the first static contact 611 and the second static contact 612 .

[0053] Specifically, the center column 614 is used to connect the battery module 100 with another battery module ( Figure 3 When stacked, the top column ( Figure 3 not shown) to disconnect the movable contact 613 from the first stationary contact 611 and / or the movable contact 613 from the second stationary contact 612.

[0054] The center column 614 can be made of an insulating material. It is secured to the housing 11 by an elastic material, which can be a spring or an elastic metal sheet. The elastic material holds the movable contact 613 against the first and second stationary contacts 611, 612, thereby connecting the negative electrode of the battery pack 71 to the common busbar 21.

[0055] In practical applications, such as Figure 3 As shown, when the battery module 100 is not stacked with another battery module, the movable contact 613 abuts the first static contact 611 and the second static contact 612. At this time, because the first static contact 611 is connected to the common busbar 21 and the second static contact 612 is connected to the negative connector 41, the common busbar 21 and the negative connector 41 are electrically connected via the first static contact 611, the movable contact 613, and the second static contact 612.

[0056] When the battery module 100 is stacked with another battery module, the top post of the other battery module will contact the mechanical switch 61. Because the center post 614 is connected to the movable contact 613 and is located between the first static contact 611 and the second static contact 612, when the top post of the other battery module pushes the center post 614, it will drive the movable contact 613 to move, similarly disconnecting the movable contact 613 from the first static contact 611 and / or disconnecting the movable contact 613 from the second static contact 612, thereby severing the electrical connection between the common busbar 21 and the negative connector 41.

[0057] After the battery modules are stacked, the top column of another battery module maintains the thrust on the moving contact 613 or the center column 614, so that the moving contact 613 and the static contacts (the first static contact 611 and / or the second static contact 612) remain disconnected, and the circuit remains disconnected to meet specific working requirements or safety needs after the battery modules are stacked.

[0058] When the battery module 100 is separated from another battery module, the thrust of the top column of the other battery module on the moving contact 613 or the center column 614 disappears, and the moving contact 613 returns to the state of resisting the first static contact 611 and the second static contact 612 under the action of its own elasticity or other reset mechanisms, and the electrical connection between the common busbar 21 and the negative connector 41 is restored.

[0059] In summary, the mechanical switch effectively controls the circuit connection status during the battery module stacking and separation process through the connection and disconnection of the moving contact and the static contact, as well as the pushing action of the center column.

[0060] In some embodiments, the first side of the top post 51 faces away from the center post, the second side of the center post 614 faces away from the top post 51, the first side of the positive connector 31 faces away from the negative connector 41, and the second side of the negative connector 41 faces away from the positive connector 31. The distance between the first side of the top post 51 and the second side of the center post 614 is greater than the distance between the first side of the positive connector 31 and the second side of the negative connector 41.

[0061] It should be noted that the upper side of the component in the drawings is its first side, and the lower side of the component in the drawings is its second side. Figure 4 As shown, distance L1 represents the distance between the first surface of top post 51 and the second surface of center post 614. Distance L2 represents the distance between the first surface of positive connector 31 and the second surface of negative connector 41.

[0062] In actual application, when the battery module 100 is stacked with another battery pack, the center column 614 will be pushed by the top column of the other battery module, causing the moving contact 613 to separate from the first static contact 611 and / or the second static contact 612. After that, as the distance between the two battery modules 100 gradually approaches, the negative connector 41 of the battery module 100 and the positive connector ( Figure 3 (not shown) connection.

[0063] When a battery module 100 is disconnected from another battery module, the negative connector 41 of the battery module 100 is first disconnected from the positive connector of the other battery module. After this, the thrust exerted by the top post of the other battery module on the movable contact 613 or the center post 614 disappears. Due to its own elasticity or other reset mechanism, the movable contact 613 returns to its position against the first and second stationary contacts 611 and 612, and the electrical connection between the common busbar 21 and the negative connector 41 is restored.

[0064] By setting the distance L1 to be greater than the distance L2, the risk of battery pack short circuit can be reduced. In addition, the contact and separation of each conductive contact during the entire disconnection process is a purely mechanical process, which has high reliability.

[0065] In some embodiments, as Figure 3 As shown, the connection detection module 81 includes a first signal connector 811, a second signal connector 812 and a diode D1. The first signal connector 811 is provided on the housing 11 and is exposed on the first side of the housing 11. The first signal connector 811 is used to connect to the control module ( Figure 3The second signal connector 812 is provided on the housing 11 and is connected to the first signal connector 811. The anode of the diode D1 is connected to the connection point between the first signal connector 811 and the second signal connector 812, and the cathode of the diode D1 is connected to the negative connector 41 of the battery module 100.

[0066] Among them, the battery module 100 and another battery module ( Figure 3 When stacked (not shown), the second signal connector 812 of the battery module 100 is connected to the first signal connector ( Figure 3 not shown).

[0067] In some embodiments, the first surface of the first signal connector 811 is opposite to the second signal connector 812, and the second surface of the second signal connector 812 is opposite to the first signal connector 811. The distance between the first surface of the first signal connector 811 and the second surface of the second signal connector 812 is smaller than the distance between the first surface of the positive connector 31 and the second surface of the negative connector 41.

[0068] It should be noted that the upper side of the component in the drawings is its first side, and the lower side of the component in the drawings is its second side. Figure 4 As shown, distance L1 represents the distance between the first surface of top post 51 and the second surface of center post 614. Distance L2 represents the distance between the first surface of positive connector 31 and the second surface of negative connector 41. Distance L3 represents the distance between the first surface of first signal connector 811 and the second surface of second signal connector 812.

[0069] In practical applications, such as Figure 3 As shown, when the second side of the battery module 100 is not connected to another battery module, the cathode of the diode D1 is connected to the common busbar 21 (the common busbar is similar to the ground) through the first static contact 611, the movable contact 613 and the second static contact 612, so that the anode of the diode D1 is at a low level.

[0070] When the second side of the battery module 100 approaches and starts to connect with the first side of another battery module, since the distance L3 is smaller than the distance L2 (see Figure 4 ) and the distance L2 is less than the distance L1. First, the central column 614 of the battery module 100 is pushed, disconnecting the connection between the moving contact 613 and the first static contact 611 and / or the connection between the moving contact 613 and the second static contact 612, so that the positive electrode of the diode D1 becomes a high level (i.e., a connection detection signal). Then, the two battery modules gradually approach each other until the negative connector 41 of the battery module 100 is connected to the positive connector of another battery module, and the positive electrode of the diode D1 becomes a low level. Thus, the control module ( Figure 3(not shown) a high-level signal (ie, a connection detection signal) can be obtained from the first signal connector 811.

[0071] When the second side of the battery module 100 begins to disconnect from the first side of the other battery module, the sequence is reversed from the connection process of the two battery modules 100. When the two battery modules are disconnected, the anode of the diode D1 also receives a high-level signal (i.e., a connection detection signal).

[0072] In summary, through the above method, the connection detection module 81 can monitor the connection and disconnection status between battery modules in real time, and transmit relevant information to other circuits or devices by outputting connection detection signals for corresponding control or feedback.

[0073] The embodiment of the present application provides a battery module 100. Traditional battery module series connection requires complex external wiring or bases, while this battery module 100 can automatically achieve electrical connection when stacked through the arrangement of a common busbar 21, a positive connector 31, a negative connector 41, a top post 51 and a mechanical switch 61, reducing the need for external wiring and reducing the complexity and cost of the connection. By utilizing the cooperation of the top post 51 and the mechanical switch 61, the series connection and the switching of the switch state are automatically achieved when the battery modules are stacked, without the need for manual intervention to perform complex circuit connections and switch operations, thereby improving the convenience and reliability of the battery module series connection. The design of the mechanical switch 61 is such that it is in a closed state when the battery modules are not stacked and automatically disconnects when stacked, reducing safety issues such as short circuits that may occur during the series connection process and improving the safety of the battery modules during the series connection process. Multiple battery modules can be conveniently stacked in series, and users can flexibly increase or decrease the number of battery modules according to actual voltage requirements to achieve flexible adjustment of the battery pack voltage, with good scalability.

[0074] See also Figure 5 , Figure 5 It is a structural diagram of a battery system provided in an embodiment of the present application.

[0075] The embodiment of the present application provides a battery system 1000, which includes at least two battery modules, each of which has the same structure as the battery module 100 of the embodiment described above. The at least two battery modules are stacked.

[0076] Figure 5 Take two battery modules stacked as an example, Figure 5 As shown, the battery module 100 and the battery module 200 are stacked.

[0077] The battery module 100 includes a housing 11, a common busbar 21, a positive connector 31, a negative connector 41, a top post 51, a mechanical switch 61 (including a first static contact 611, a second static contact 612, a movable contact 613, and a center post 614), and a connection detection module 81 (including a first signal connector 811, a second signal connector 812, and a diode D1). The positive connector 31 is connected to the positive terminal of the battery pack 71, and the negative connector 41 is connected to the negative terminal of the battery pack 71.

[0078] The battery module 200 includes a housing 12, a common busbar 22, a positive connector 32, a negative connector 42, a top post 52, a mechanical switch 62 (including a first static contact 621, a second static contact 622, a movable contact 623, and a center post 624), and a connection detection module 82 (including a first signal connector 821, a second signal connector 822, and a diode D2). The positive connector 32 is connected to the positive terminal of the battery pack 72, and the negative connector 42 is connected to the negative terminal of the battery pack 72.

[0079] Specifically, the working principle of connecting and disconnecting the two battery packs can be referred to the above embodiment and will not be repeated here.

[0080] See also Figure 6 , Figure 6 This is a schematic structural diagram of another battery system provided in an embodiment of the present application.

[0081] In some embodiments, the battery system 1000 further includes a control module 90. The control module 90 is stacked with at least two battery modules. The control module 90 is configured to receive connection detection signals output by the battery modules to determine the connection status of the at least two battery modules. The connection status includes a connected and / or disconnected state, and a non-connected and / or non-disconnected state.

[0082] Specifically, the control module 90 includes a housing 91, a control unit 92, and a level detection unit 93. The control unit 92 and the level detection unit 93 are both provided in the housing 91, and the control unit 92 is connected to the level detection unit 93. When the control module 90 is connected to a battery module ( Figure 6 When the battery module 100 is stacked, the level detection unit 93 is connected to the first signal connector of the battery module.

[0083] The control unit 92 can be an MCU (Microcontroller Unit) or other device capable of performing the same function. In the battery system 1000, the control unit 92 receives signals from the level detection unit 93, processes and analyzes these signals, and thereby determines the connection status of at least two battery modules (including connected and / or disconnected states, as well as non-connected and / or disconnected states).

[0084] The primary function of the level detection unit 93 is to detect the level signal output by the first signal connector of the battery module. Since a connection detection module (such as the connection detection module 81 of the battery module 100) outputs a high-level signal (i.e., a connection detection signal) during the battery module connection and / or disconnection process, the level detection unit 93 detects and measures this high-level signal and transmits the level information to the control unit 92, allowing the control unit 92 to determine the connection status of the battery system 1000 based on the level information.

[0085] It should be noted that if Figure 6 As shown, during the connection of the two battery modules, the mechanical switch 61 (including the first static contact 611 , the second static contact 612 , the moving contact 613 and the center column 614 ) is first disconnected, and the negative connector 41 and the positive connector 32 are then connected.

[0086] To disconnect the two battery packs, the negative connector 41 and the positive connector 32 are first disconnected, and the movable contact 613 in the mechanical switch 61 connects to the first and second static contacts 611 and 612. During the disconnection process between the negative connector 41 and the positive connector 32 and the reconnection to the mechanical switch 61, when the mechanical switch 61 is disconnected, the control module 90 is briefly powered down (potentially causing the control unit 92 and the level detection unit 93 to not function). A supercapacitor can be added to the control module 90 to power the control unit 92 and the level detection unit 93.

[0087] The embodiment of the present application provides a battery system 1000. Traditional battery module series connection requires complex external wiring or bases, while the battery modules in this battery system 1000 can automatically achieve electrical connection when stacked, reducing the need for external wiring and reducing the complexity and cost of the connection. When the battery modules are stacked, the series connection and the switching of the switch state are automatically achieved, without the need for manual intervention to perform complex circuit connections and switch operations, thereby improving the convenience and reliability of the battery module series connection. Multiple battery modules can be conveniently stacked in series, and users can flexibly increase or decrease the number of battery modules according to actual voltage requirements, thereby achieving flexible adjustment of the voltage of the battery system 1000 and having good scalability.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Based on the concept of the present application, the technical features in the above embodiments or different embodiments can also be combined, and there are many other changes in different aspects of the present application as described above. For the sake of simplicity, they are not provided in detail. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery module, characterized in that: The battery module is used to be stacked with another battery module, and the battery module includes: case; A common busbar, wherein the common busbar is provided in the housing, a first end of the common busbar is exposed to a first side of the housing, and a second end of the common busbar is exposed to a second side of the housing; a positive connector, the positive connector being provided on the housing, the positive connector being exposed on the first side of the housing, and being used to connect to the positive electrode of the battery pack; a negative electrode connector, the negative electrode connector being provided on the housing, the negative electrode connector being exposed on the second side of the housing, and the negative electrode connector being used to connect to the negative electrode of the battery pack; a top post, the top post being provided on the housing and protruding from a first side of the housing; a mechanical switch, the mechanical switch being disposed on the second side of the housing, the mechanical switch connecting the common busbar to the negative connector; When the battery module is stacked with another battery module, the second end of the common busbar of the battery module is connected to the first end of the common busbar of the other battery module, the negative connector of the battery module is connected to the positive connector of the other battery module, and the mechanical switch of the battery module is disconnected by the top column of the other battery module.

2. The battery module according to claim 1, wherein: The first side of the housing is disposed opposite to the second side of the housing.

3. The battery module according to claim 1, wherein: The mechanical switch comprises: a first static contact connected to the common busbar; a second static contact connected to the negative connector; A moving contact, the moving contact abutting the first static contact and the second static contact; the moving contact is used to be pushed by the top column of another battery module when the battery module is stacked with another battery module to disconnect the connection between the moving contact and the first static contact and / or the connection between the moving contact and the second static contact.

4. The battery module according to claim 3, characterized in that: The mechanical switch further comprises: A center column, wherein the center column is connected to the moving contact and is arranged between the first static contact and the second static contact; the center column is used to be pushed by the top column of another battery module when the battery module is stacked with another battery module to disconnect the connection between the moving contact and the first static contact and / or the connection between the moving contact and the second static contact.

5. The battery module according to claim 4, characterized in that: The first surface of the top column is opposite to the center column, the second surface of the center column is opposite to the top column, the first surface of the positive connector is opposite to the negative connector, and the second surface of the negative connector is opposite to the positive connector; The distance between the first surface of the top column and the second surface of the center column is greater than the distance between the first surface of the positive connector and the second surface of the negative connector.

6. The battery module according to claim 5, characterized in that: The battery module further includes: A connection detection module is provided in the shell, the first end of the connection detection module is exposed to the first side of the shell, and the connection detection module is connected to the negative connector; the connection detection module is used to output a connection detection signal during the process of connecting the second side of the battery module with the first side of another battery module, and during the process of disconnecting the second side of the battery module from the first side of another battery module.

7. The battery module according to claim 6, characterized in that: The connection detection module includes: a first signal connector, the first signal connector being provided on the housing, the first signal connector being exposed on a first side of the housing, and being used for connecting to a control module; a second signal connector, the second signal connector being disposed on the housing and connected to the first signal connector; a diode D1, wherein the anode of the diode D1 is connected to the connection point between the first signal connector and the second signal connector, and the cathode of the diode D1 is connected to the negative electrode connector of the battery module; Wherein, when the battery module is stacked with another battery module, the second signal connector of the battery module is connected to the first signal connector of the other battery module.

8. The battery module according to claim 7, characterized in that: The first surface of the first signal connector is opposite to the second signal connector, and the second surface of the second signal connector is opposite to the first signal connector; The distance between the first surface of the first signal connector and the second surface of the second signal connector is smaller than the distance between the first surface of the positive connector and the second surface of the negative connector.

9. A battery system, characterized in that: The battery system comprises: At least two battery modules according to any one of claims 1 to 8, wherein the at least two battery modules are stacked.

10. The battery system according to claim 9, characterized in that The battery system further comprises: A control module is stacked with the at least two battery modules; the control module is used to receive a connection detection signal output by the battery module to determine the connection status of the at least two battery modules.

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