Battery module and battery pack

Abstract

The utility model provides a battery module and a battery pack, and relates to the technical field of batteries. The battery module comprises a plurality of battery cells and a plurality of isolation structures, wherein one battery cell corresponds to one isolation structure; the end isolation structure is connected between the first end cell and the first output end; an isolation structure is connected between the adjacent battery cells, the first end of one isolation structure is electrically connected with the first electrode of the first battery cell, the second end of one isolation structure is electrically connected with the second electrode of the second battery cell, the third end of one isolation structure is electrically connected with the first electrode of the second battery cell, and the first battery cell and the second battery cell are adjacent battery cells. The polarities of the first electrode and the second electrode of each battery cell are opposite; the isolation structure is controlled by a bypass control signal, and when the bypass control signal is in a first state, the first electrode of the first battery cell is electrically connected with the second electrode of the second battery cell; and when the bypass control signal is in the second state, the first electrode of the first battery cell is electrically connected with the first electrode of the second battery cell.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a battery module and a battery pack. Background Art

[0002] When a single battery cell failure causes the energy storage system to fail to operate, users will be in a power outage while waiting for maintenance to be completed, which may even affect the operation of the power grid. Utility Model Content

[0003] The present disclosure provides a battery module and a battery pack, which at least to a certain extent overcome the problem in the related art that a single battery cell abnormality causes the energy storage system to be shut down for maintenance and affects user use.

[0004] Other features and advantages of the present disclosure will become apparent from the following detailed description, or may be learned in part by the practice of the present disclosure.

[0005] According to one aspect of the present disclosure, there is provided a battery module, comprising: a plurality of battery cells and a plurality of isolation structures connected to a first output terminal and a second output terminal of the battery module, wherein one battery cell and one isolation structure are provided correspondingly, the isolation structure comprises an end isolation structure, and the battery cell comprises a first end battery cell connected to the first output terminal;

[0006] Wherein, the first end of the end isolation structure is connected to the first output end, the second end of the end isolation structure is connected to the second electrode of the first end battery cell, and the third end of the end isolation structure is connected to the first electrode of the first end battery cell;

[0007] A first end of an isolation structure connected between adjacent battery cells is electrically connected to a first electrode of the first battery cell, a second end of the isolation structure is electrically connected to a second electrode of the second battery cell, and a third end of the isolation structure is electrically connected to a first electrode of the second battery cell. The first battery cell and the second battery cell are adjacent battery cells, and the polarity of the first electrode and the second electrode of each battery cell is opposite. The isolation structure is controlled by a bypass control signal. When the bypass control signal is in a first state, the first electrode of the first battery cell is electrically connected to the second electrode of the second battery cell; when the bypass control signal is in a second state, the first electrode of the second battery cell is electrically connected to the second electrode of the second battery cell.

[0008] In one embodiment of the present disclosure, the isolation structure includes a first flow guide and a circuit selection switch;

[0009] Wherein, one end of the first flow guide is connected to the first electrode of the first battery cell, and the other end of the first flow guide is connected to the first end of the circuit selection switch;

[0010] A switching element is connected to the first end of the circuit selection switch, a second end of the circuit selection switch is electrically connected to the second electrode of the second battery cell, a third end of the circuit selection switch is electrically connected to the first electrode of the second battery cell, and the switching element is selectively connected to the second end or the third end of the circuit selection switch under the control of the bypass control signal.

[0011] In one embodiment of the present disclosure, the first current guide member includes a current-carrying plug and an insulating connector, the connector is provided with a first pole fixing hole matched with a pole of the battery cell, a conductor is provided in the first pole fixing hole, the circuit selection switch is provided on the connector, and the circuit selection switch is electrically connected to the current-carrying plug and the conductor;

[0012] A plug-in slot is provided on the side wall of the connector corresponding to the first electrode of the first battery cell, and the current-carrying plug is provided on the side wall of the connector corresponding to the second electrode of the second battery cell. When the current-carrying plug is matched with the plug-in slot, the current-carrying plug extends to the first electrode of the first battery cell and makes electrical contact.

[0013] In one embodiment of the present disclosure, a chamfer is provided at the end of the current-carrying plug.

[0014] In one embodiment of the present disclosure, one of the two adjacent connecting members is a strip plate, and the other connecting member is an L-shaped plate, and the current-carrying plug is arranged on a short side of the L-shaped plate.

[0015] In one embodiment of the present disclosure, the isolation structure includes a second flow guide and a bypass member;

[0016] Wherein, one end of the second current guide is connected to the first electrode of the first battery cell, and the other end of the second current guide is connected to the second electrode of the second battery cell, so that the multiple battery cells are connected in series;

[0017] One end of the bypass element is connected to the first electrode of the first battery cell, the other end of the bypass element is connected to the second electrode of the first battery cell, and the controlled end of the bypass element inputs the bypass control signal.

[0018] In one embodiment of the present disclosure, the bypass device includes a controller, a light-emitting device and a photosensitive device. The light-emitting device and the photosensitive device are arranged opposite to each other, the light-emitting device is electrically connected to the controller, and the two ends of the photosensitive device are electrically connected to the first electrode and the second electrode of the first battery cell respectively.

[0019] In one embodiment of the present disclosure, the second flow guide comprises a plug-in connector and an insulating connector, and the connector is provided with a second pole fixing hole matched with a pole of the battery cell;

[0020] A connecting groove is provided on the side wall of the connecting piece corresponding to the first electrode of the first battery cell, and the plug-in component is provided on the side wall of the connecting piece corresponding to the second electrode of the second battery cell. When the plug-in component cooperates with the connecting groove, two ends of the plug-in component respectively extend to the first electrode of the first battery cell and the second electrode of the second battery cell and are in electrical contact with the first electrode and the second electrode.

[0021] In one embodiment of the present disclosure, the bypass piece is arranged on the connecting piece, and the connecting piece is provided with a first wire and a second wire. The bypass piece is electrically connected to the first electrode of the first battery cell through the first wire, and the bypass piece is electrically connected to the second electrode of the first battery cell through the second wire.

[0022] According to another aspect of the present disclosure, a battery pack is also provided, comprising a box body and the battery module provided in the above embodiment.

[0023] In an embodiment of the present disclosure, a battery module includes a plurality of battery cells and a plurality of isolation structures connected to a first output terminal and a second output terminal of the battery module, wherein one battery cell and one isolation structure are arranged correspondingly, and the isolation structure includes an end isolation structure, and the battery cell includes a first end battery cell connected to the first output terminal; a first end of the end isolation structure is connected to the first output terminal, a second end of the end isolation structure is connected to a second electrode of the first end battery cell, and a third end of the end isolation structure is connected to a first electrode of the first end battery cell; a first end of an isolation structure connected between adjacent battery cells is electrically connected to a first electrode of the first battery cell, a second end of an isolation structure is electrically connected to a second electrode of the second battery cell, and a The third end of the isolation structure is electrically connected to the first electrode of the second battery cell, the first battery cell and the second battery cell are adjacent battery cells, and the polarities of the first electrode and the second electrode of each battery cell are opposite; the isolation structure is controlled by a bypass control signal, and when the bypass control signal is in a first state, the first electrode of the first battery cell is electrically connected to the second electrode of the second battery cell; when the bypass control signal is in a second state, the first electrode of the first battery cell is electrically connected to the first electrode of the second battery cell. On the one hand, the present disclosure can prevent the battery cell from being overcharged or over-discharged, ensure that when thermal runaway occurs in the battery cell, the faulty battery cell is isolated, and the safety of the battery module is improved; on the other hand, there is no need to stop the energy storage system when isolating the faulty battery cell, thereby meeting the customer's continuous use requirements.

[0024] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0026] Figure 1 A structural schematic diagram showing an exemplary application scenario of an energy storage system provided in an embodiment of the present disclosure.

[0027] Figure 2 A schematic structural diagram of a battery module provided in an embodiment of the present disclosure is shown.

[0028] Figure 3 A schematic diagram of a battery module provided by an embodiment of the present disclosure is shown.

[0029] Figure 4 A schematic diagram of the connection structure of the isolation structure provided by an embodiment of the present disclosure is shown.

[0030] Figure 5 A three-dimensional diagram of a battery module provided by an embodiment of the present disclosure is shown.

[0031] Figure 6 for Figure 5 Exploded view of the battery module.

[0032] Figure 7 A structural schematic diagram of an isolation structure provided by an embodiment of the present disclosure is shown.

[0033] Figure 8 A structural schematic diagram of another isolation structure provided by an embodiment of the present disclosure is shown.

[0034] Fig. 9 A schematic structural diagram of another battery module provided in an embodiment of the present disclosure is shown.

[0035] Fig.10 A schematic diagram of another battery module provided by an embodiment of the present disclosure is shown.

[0036] Fig.11 A structural schematic diagram of yet another isolation structure provided by an embodiment of the present disclosure is shown.

[0037] The reference numerals are described as follows:

[0038] 110, energy storage device; 120, high voltage cable; 130, first electric energy conversion device; 140, second electric energy conversion device;

[0039] 111, battery cell; 200, isolation structure; 210, first current guide; 211, current-carrying plug; 212, first connecting member; 2121, first pole fixing hole; 2122, plug-in slot; 220, circuit selection switch; 230, controller; 240, second current guide; 241, plug-in member; 242, second connecting member; 2421, second pole fixing hole; 2422, connecting slot; 250, bypass member; 251, controller; 252, light-emitting device; 253, photosensitive device. DETAILED DESCRIPTION

[0040] The preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0041] The terms "first" and "second" in this document are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly stated that it is a limitation.

[0042] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0044] Since the energy people need is highly temporal and spatial, in order to rationally use energy and improve energy utilization, it is necessary to use a medium or device to store one form of energy in the same form or convert it into another form of energy, and then release it in a specific form based on future application needs. At present, the main way to generate green electricity is to develop green energy such as photovoltaics and wind power to replace fossil energy.

[0045] At present, the generation of green electricity generally relies on photovoltaics, wind power, and hydropower, etc. However, wind and solar energy generally have problems of strong intermittency and large volatility, which will cause instability in the power grid, insufficient electricity during peak hours, and too much electricity during valley hours. Unstable voltage will also cause damage to electricity. Therefore, insufficient electricity demand or insufficient grid acceptance capacity may cause the problem of "abandoning wind and solar power". To solve these problems, we must rely on energy storage. That is, converting electrical energy into other forms of energy through physical or chemical means and storing it, and converting energy into electrical energy and releasing it when needed. In simple terms, energy storage is like a large "power bank". When photovoltaic and wind energy are sufficient, electrical energy is stored and the stored electricity is released when needed.

[0046] Taking electrochemical energy storage as an example, the present disclosure provides an energy storage device, which has a group of chemical batteries in it. The chemical elements in the batteries are mainly used as energy storage media. The charging and discharging process is accompanied by chemical reactions or changes in the energy storage media. In simple terms, the electricity generated by wind and solar energy is stored in chemical batteries. When the use of external electricity reaches a peak, the stored electricity is released for use, or transferred to places where electricity is scarce for use.

[0047] At present, energy storage (i.e. energy storage) has a wide range of application scenarios, including energy storage on the power generation side, energy storage on the grid side, and energy storage on the power consumption side. The corresponding types of energy storage devices include:

[0048] (1) Large-scale energy storage power stations applied to wind power and photovoltaic power stations can help renewable energy generation meet grid connection requirements and improve the utilization rate of renewable energy. As a high-quality active / reactive regulating power source on the power supply side, energy storage power stations can achieve load matching of electric energy in time and space, enhance the ability to absorb renewable energy, reduce instantaneous power changes, reduce the impact on the power grid, improve the absorption of new energy generation, and are of great significance in power grid system backup, relieving peak load power supply pressure, and peak and frequency regulation.

[0049] (2) Energy storage containers used on the grid side mainly perform peak load regulation, frequency regulation, and grid congestion relief. They can achieve peak load shaving and valley filling of power loads, that is, charging the energy storage batteries when the power load is low and releasing the stored power during the peak load period, thereby achieving a balance between power production and consumption;

[0050] (3) Small energy storage cabinets used on the power consumption side, mainly for self-generation and self-use of electricity, peak-valley price difference arbitrage, capacity cost management and improving power supply reliability. According to different application scenarios, energy storage on the power consumption side can be divided into industrial and commercial energy storage cabinets, household energy storage devices, energy storage charging piles, etc., which are generally used in conjunction with distributed photovoltaics. Industrial and commercial users can use energy storage for valley-peak price difference arbitrage and capacity cost management. In the power market that implements peak-valley electricity prices, by charging the energy storage system at low electricity prices and discharging the energy storage system at high electricity prices, peak-valley electricity price difference arbitrage is achieved to reduce electricity costs. In addition, industrial enterprises that are subject to two-part electricity prices can use energy storage systems to store energy during low electricity consumption and discharge at peak loads, thereby reducing peak power and the maximum demand reported, and achieving the purpose of reducing capacity electricity charges. Household photovoltaic storage can improve the level of self-generation and self-use of electricity. Due to high electricity prices and poor power supply stability, the demand for household photovoltaic installations has been driven. Considering that photovoltaic power is generated during the day, and users generally have higher loads at night, energy storage can be configured to better utilize photovoltaic power, improve the level of self-generation and self-use, and reduce electricity costs. In addition, communication base stations, data centers and other fields need to configure energy storage for backup power.

[0051] See also Figure 1 , Figure 1 is a schematic diagram of the structure of an energy storage system according to an embodiment of the present disclosure, and Figure 1 The embodiment is described by taking the shared energy storage scenario on the generation / distribution side as an example, but the energy storage system 100 disclosed in the present invention is not limited to the energy storage scenario on the generation / distribution side.

[0052] The present disclosure provides an energy storage system, which includes: an energy storage device 110, a high-voltage cable 120, a first electric energy conversion device 130, and a second electric energy conversion device 140. In the case of power generation, the first electric energy conversion device 130 and the second electric energy conversion device 140 are used to convert other forms of energy into electric energy, which is connected to the high-voltage cable 120 and supplied to the power distribution network for use. When the power load is low and the first conversion device 130 and the second electric energy conversion device 140 generate excess power, the excess power is stored in the energy storage device 110, thereby reducing the wind and solar power abandonment rates and improving the problem of new energy power generation and consumption. When the power load is high, the power grid issues an instruction to transmit the power stored in the energy storage device 110 in conjunction with the high-voltage cable 120 in a grid-connected mode to the power consumption side, thereby providing peak load regulation, frequency regulation, standby and other services for the operation of the power grid, giving full play to the peak load regulation of the power grid, promoting peak load shaving and valley filling of the power grid, and alleviating the power supply pressure of the power grid.

[0053] Optionally, the first electric energy conversion device 130 and the second electric energy conversion device 140 can convert at least one of solar energy, light energy, wind energy, thermal energy, tidal energy, biomass energy and mechanical energy into electric energy.

[0054] The number of energy storage devices 110 can be multiple, and multiple energy storage devices 110 are connected in series or in parallel. Multiple energy storage devices 110 are supported and electrically connected by isolation plates (not shown). In this embodiment, "multiple" refers to two or more. An energy storage box can also be provided outside the energy storage device 110 to accommodate the energy storage device 110.

[0055] Optionally, the energy storage device 110 may include but is not limited to a single cell, a battery module, a battery pack, a battery system, etc. The actual application form of the energy storage device 110 provided in the embodiment of the present disclosure may be but is not limited to the listed products, and may also be other application forms. The embodiment of the present disclosure does not strictly limit the application form of the energy storage device 110. The embodiment of the present disclosure is only described by taking the energy storage device 110 as a single cell as an example. When the energy storage device 110 is a single cell, the energy storage device 110 may be at least one of a cylindrical battery, a square battery, etc.

[0056] With the continuous development of energy storage systems, the number of large-cell and large-capacity products has increased, and the consistency problem of battery systems has become more serious. When an abnormality is detected in the battery cell (such as overcharge, overdischarge, overtemperature, etc.), the entire energy storage system is usually stopped and waits for maintenance personnel to inspect; for the problem of excessive pressure difference, the equalization technology of the battery management system (BMS) can be used for optimization.

[0057] Balancing technologies include active balancing and passive balancing. Passive balancing achieves balancing by dissipating the energy of high-voltage cells through resistance heating, while active balancing achieves balancing by transferring high energy to low energy. Both of the above balancing methods are balanced through the physical wiring harness from the BMS.

[0058] For passive balancing, the balancing current is small, usually around 100mA. For large-cell and large-capacity products, passive balancing takes a long time to show the balancing effect, affecting the use of the energy storage system. For active balancing, the balancing current is large, usually 2A to 5A, and has strict requirements on wiring harness, safety, heat generation, structure, etc. Usually one balancing module corresponds to one cell, and the balancing efficiency is not high.

[0059] In addition, when a single battery cell failure causes the energy storage system to be unable to operate, the customer or user end will be in a power outage state while waiting for maintenance to be completed, resulting in a poor user experience and even affecting the normal operation of the power grid.

[0060] In order to solve at least part of the above-mentioned technical problems, the battery module disclosed in the present invention includes a plurality of battery cells and a plurality of isolation structures connected to a first output end and a second output end of the battery module, wherein one battery cell and one isolation structure are arranged correspondingly, the isolation structure includes an end isolation structure, and the battery cell includes a first end battery cell connected to the first output end; the first end of the end isolation structure is connected to the first output end corresponding to the battery module, the second end of the end isolation structure is connected to the second electrode of the first end battery cell, and the third end of the end isolation structure is connected to the first electrode of the first end battery cell; an isolation structure is connected between adjacent battery cells, the first end of an isolation structure is electrically connected to the first electrode of the first battery cell, and the second end of an isolation structure is electrically connected to the second electrode of the second battery cell The second electrode of the cell is electrically connected, and the third end of an isolation structure is electrically connected to the first electrode of the second cell. The first cell and the second cell are adjacent cells, and the polarities of the first electrode and the second electrode of each cell are opposite. The isolation structure is controlled by a bypass control signal. When the bypass control signal is in a first state, the first electrode of the first cell is electrically connected to the second electrode of the second cell. When the bypass control signal is in a second state, the first electrode of the first cell is electrically connected to the first electrode of the second cell. On the one hand, the present disclosure can prevent overcharging or over-discharging of the cell, ensure that when thermal runaway occurs in the cell, the faulty cell is isolated, and the safety of the battery module is improved. On the other hand, there is no need to stop the energy storage system when isolating the faulty cell, so as to meet the customer's continuous use requirements. It is specifically described through the following embodiments:

[0061] Figure 2 A schematic diagram of the structure of a battery module provided by an embodiment of the present disclosure is shown. Figure 2 The battery module in the embodiment of the present disclosure includes a plurality of battery cells 111 and a plurality of isolation structures 200 connected to the first output terminal and the second output terminal of the battery module. One battery cell 111 and one isolation structure 200 are arranged correspondingly. The isolation structure 200 includes an end isolation structure. The battery cell 111 includes a first end battery cell connected to the first output terminal. The end isolation structure is connected between the first output terminal and the first end battery cell. An isolation structure 200 is arranged between adjacent first and second battery cells.

[0062] The first output terminal can be the positive electrode of the battery module, and the second output terminal can be the negative electrode of the battery module. Alternatively, the first output terminal can be the negative electrode of the battery module, and the second output terminal can be the positive electrode of the battery module. The polarity of the first output terminal is the same as the polarity of the second electrode of the battery cell at the first end. Figure 2 The first output terminal is the positive electrode of the module and the second output terminal is the negative electrode of the module.

[0063] A plurality of battery cells 111 and a plurality of isolation structures 200 are connected between the module positive electrode and the module negative electrode of the battery module. The battery cell 111 connected to the module positive electrode is called a first end battery cell, and the isolation structure 200 corresponding to the first end battery cell is called an end isolation structure. The end isolation structure is connected between the first end battery cell and the first output terminal.

[0064] The number of battery cells 111 and isolation structures 200 can be determined according to actual product requirements, and one isolation structure 200 is used to implement bypass control of one battery cell 111. Figure 2 In the embodiment, the battery module includes four battery cells 111, namely Cell1 to Cell4, and four isolation structures 200, namely M1 to M4. The four battery cells 111 are connected in series between the module positive electrode and the module negative electrode of the battery module.

[0065] The first end of the end isolation structure is connected to the first output end, the second end of the end isolation structure is connected to the second electrode of the first end battery cell, and the third end of the end isolation structure is connected to the first electrode of the first end battery cell. Figure 2 In the figure, the end isolation structure is M1, the first end battery cell is battery cell1, the first end and the second end of the end isolation structure M1 are connected between the module positive electrode of the battery module and the positive electrode + of the first end battery cell, and the third end of M1 is connected to the negative electrode - of the first end battery cell.

[0066] It should be noted that the end isolation structure can also be set between the negative electrode of the battery module and the last battery cell (in this case, the last battery cell is the first end battery cell) by selecting components with corresponding functions, and the present disclosure does not limit this.

[0067] An end isolation structure 200 is connected between adjacent battery cells 111, a first end of an isolation structure 200 is electrically connected to a first electrode of a first battery cell, a second end of an isolation structure 200 is electrically connected to a second electrode of the first battery cell, a third end of an isolation structure 200 is electrically connected to a first electrode of the first battery cell, the first battery cell and the second battery cell are adjacent battery cells 111, and the polarities of the first electrode and the second electrode of each battery cell 111 are opposite.

[0068] In one embodiment, the isolation structure 200 can realize the series connection of multiple battery cells 111 when the battery cell 111 is not faulty, and realize the bypass of the battery cell 111 when the battery cell 111 fails, so that the faulty battery cell 111 can be directly isolated without stopping the energy storage system, thereby meeting the customer's continuous use needs.

[0069] The first electrode of the battery cell 111 may be a positive electrode, and the second electrode may be a negative electrode. Alternatively, the first electrode of the battery cell 111 may be a negative electrode, and the second electrode may be a positive electrode. The present disclosure does not specifically limit this. Figure 2In the description, the first electrode of the battery cell 111 is a positive electrode and the second electrode is a negative electrode.

[0070] like Figure 2 As shown, when the first battery cell is battery cell Cell2 and the second battery cell is battery cell Cell3, the isolation structure 200 corresponding to battery cell Cell3 is M3. At this time, the isolation structure M3 is connected between battery cell Cell2 and battery cell Cell3, the first end of the isolation structure M3 is electrically connected to the negative electrode - of battery cell Cell2, the second end of the isolation structure M3 is electrically connected to the positive electrode + of battery cell Cell3, and the third end of the isolation structure M3 is electrically connected to the negative electrode - of battery cell Cell3.

[0071] The connection method of the isolation structures 200 corresponding to other adjacent battery cells 111 may refer to the connection method of the isolation structures M3 corresponding to the battery cells Cell2 and Cell3, which will not be described in detail here.

[0072] It should be noted that the first battery cell 111 (eg Figure 2 The first end of the isolation structure 200 corresponding to Cell1 in the battery pack (or the above-mentioned end battery cell) is connected to the corresponding high-voltage switch box and other components in the battery pack, the second end is connected to the positive electrode + of the battery cell Cell1, and the third end of the isolation structure 200 is connected to the negative electrode - of the battery cell Cell1.

[0073] The isolation structure 200 is controlled by a bypass control signal. When the bypass control signal is in a first state, the first electrode of the first battery cell is electrically connected to the second electrode of the second battery cell; when the bypass control signal is in a second state, the first electrode of the first battery cell is electrically connected to the first electrode of the second battery cell.

[0074] The bypass control signal being in the first state refers to the bypass control signal generated when the battery cell 111 is in normal use, and the bypass control signal being in the second state refers to the bypass control signal generated when the battery cell 111 fails.

[0075] In one embodiment, the first state can be a low level, and the second state can be a high level. When the bypass control signal is at a low level, the isolation structure 200 electrically connects two adjacent battery cells 111, thereby realizing a series connection of multiple battery cells 111; when the bypass control signal is at a high level, the isolation structure 200 connects the first electrode of the first battery cell with the first electrode of the second battery cell, thereby isolating the second battery cell. At this time, the battery module is still in a conductive state, thereby ensuring the continuous use of the energy storage system.

[0076] In one embodiment, the first state can also be a high-resistance state, in which case the isolation structure 200 has no control signal input and two adjacent battery cells 111 are electrically connected; the second state is a high level, the isolation structure 200 inputs a bypass control signal, and the isolation structure 200 bypasses the corresponding battery cell 111.

[0077] It should be noted that the first battery cell and the second battery cell are adjacent battery cells 111, which means that the two battery cells 111 are adjacent battery cells 111 when connected in series. For example, if the negative electrode of the first battery cell is electrically connected to the positive electrode of the second battery cell, the first battery cell and the second battery cell are adjacent battery cells 111.

[0078] In an embodiment of the present disclosure, the battery module includes a plurality of battery cells 111 and a plurality of isolation structures 200 connected to a first output terminal and a second output terminal of the battery module, wherein one battery cell 111 and one isolation structure 200 are arranged correspondingly, and the isolation structure 200 includes an end isolation structure, and the battery cell 111 includes a first end battery cell connected to the first output terminal; the first end of the end isolation structure is connected to the first output terminal, the second end of the end isolation structure is connected to the second electrode of the first end battery cell, and the third end of the end isolation structure is connected to the first electrode of the first end battery cell; an isolation structure 200 is connected between adjacent battery cells 111, the first end of an isolation structure 200 is electrically connected to the first electrode of the first battery cell, and the second end of an isolation structure 200 is electrically connected to the second electrode of the second battery cell. The electrodes are electrically connected, and a third end of an isolation structure 200 is electrically connected to a first electrode of a second battery cell. The first battery cell and the second battery cell are adjacent battery cells 111, and the polarities of the first electrode and the second electrode of each battery cell 111 are opposite. The isolation structure 200 is controlled by a bypass control signal. When the bypass control signal is in a first state, the first electrode of the first battery cell is electrically connected to the second electrode of the second battery cell. When the bypass control signal is in a second state, the first electrode of the first battery cell is electrically connected to the first electrode of the second battery cell. On the one hand, the present disclosure can prevent the battery cell 111 from being overcharged or over-discharged, and ensure that when thermal runaway occurs in the battery cell 111, the faulty battery cell 111 is isolated, thereby improving the safety of the battery module. On the other hand, there is no need to stop the energy storage system when isolating the faulty battery cell 111, thereby meeting the customer's continuous use requirements.

[0079] Figure 3 FIG. 2 shows a schematic diagram of a battery module provided by an embodiment of the present disclosure. Figure 3 As shown, in one embodiment, each isolation structure 200 may include a controller 230 and a circuit selection switch 220. The following takes the connection method of the i-1th battery cell 111 and the i-th battery cell 111 as an example for explanation, wherein i=0, 1, ... n, n is the total number of battery cells 111 in the battery module, and n is a positive integer. The connection method of other adjacent battery cells 111 or the first battery cell 111 and the high-voltage switch box is similar, and will not be repeated in this disclosure.

[0080] like Figure 3As shown, the first end of the loop selection switch 220 is connected to the first electrode V- of the battery cell Celli-1, the second end is connected to the second electrode V+ of the battery cell Celli, and the third end is connected to the first electrode V- of the battery cell Celli. The loop selection switch 220 is controlled by a bypass control signal. When the bypass control signal is in a first state, the first electrode V- of the battery cell Celli-1 is electrically connected to the second electrode V+ of the battery cell Celli, and the second electrode V+ of the battery cell Celli is disconnected from the first electrode V- of the battery cell Celli, so that the battery cell Celli is connected in series with the battery cell Celli-1; when the bypass control signal is in a second state, the first electrode V- of the battery cell Celli-1 is disconnected from the second electrode V+ of the battery cell Celli, and the first electrode V- of the battery cell Celli is electrically connected to the first electrode V- of the battery cell Celli-1, thereby isolating the battery cell Celli, thereby simply and conveniently isolating the faulty battery cell 111 without stopping the operation of the entire energy storage system.

[0081] The controller 230 has a voltage acquisition port, which is respectively connected to the first electrode V+ and the second electrode V- of the battery cell Celli, and calculates the voltage value of the battery cell Celli based on the collected voltage values ​​of the first electrode V+ and the second electrode V-. The controller 230 has a temperature acquisition port, which collects the temperature value Temp of the temperature sensor of the battery cell Celli. The controller 230 transmits the collected voltage value and temperature value Temp of the battery cell Celli to the battery management system. The battery management system determines the state of the bypass control signal based on the voltage value and temperature value Temp of the battery cell Celli, and sends the bypass control signal to the controller 230. The controller 230 controls the loop selection switch 220 based on the bypass control signal.

[0082] In addition, controller i is connected to controller i-1 and controller i+1, and uses power line communication (PLC communication) and PLC communication. After controller i+1 collects data, it can transmit the data to controller i. After controller i summarizes the data, it transmits it to controller i-1, until the last controller 0 summarizes the data of all battery cells 111 and sends it to the master control BMS or other receivers.

[0083] It should be noted that the data transmission sequence of the controller 230 may also be in the ascending order of the serial number of the controller 230, and the present disclosure does not make any specific limitation on this.

[0084] In one embodiment, the circuit selection switch 220 may include an optocoupler switch or a single-pole double-throw automatic switching switch. When the battery cell 111 operates normally, the poles of the single-pole double-throw switch are controlled by a bypass control signal to achieve automatic switching.

[0085] In one embodiment, an isolation structure 200 similar to a three-way valve is used to replace the aluminum busbar to connect adjacent battery cells 111. The isolation structure 200 has the characteristics of low resistivity, high temperature resistance, continuous passage of large current, high pressure resistance, corrosion resistance, and low voltage control. The default bypass control signal is in the first state. When the battery cell 111 fails, the bypass control signal switches to the second state.

[0086] Figure 4 FIG. 2 is a schematic diagram showing the connection structure of the isolation structure 200 provided in an embodiment of the present disclosure. Figure 4 As shown, the isolation structure 200 also includes a first guide member 210; wherein, one end of the first guide member 210 is connected to the first electrode of the first battery cell, and the other end of the first guide member 210 is connected to the first end of the loop selection switch 220; the first end of the loop selection switch 220 is connected to a switching member, the second end of the loop selection switch 220 is electrically connected to the second electrode of the second battery cell, the third end of the loop selection switch 220 is electrically connected to the first electrode of the second battery cell, and the switching member is selectively connected to the second end or the third end of the loop selection switch 220 under the control of a bypass control signal.

[0087] In one embodiment, the loop selection switch 220 includes at least one of an optocoupler switch and a single-pole double-throw switch.

[0088] Exemplarily, the first end of the single-pole double-throw switch is connected to the first guide member 210, the first guide member 210 is connected to the first electrode of the first battery cell, the second end and the third end of the single-pole double-throw switch are respectively connected to the second electrode and the first electrode of the second battery cell, the pole of the single-pole double-throw switch is connected to the motor as a switching element, and the motor is selectively connected to the second end or the third end of the single-pole double-throw switch under the control of the bypass control signal output by the controller 230.

[0089] Exemplarily, the optocoupler switch can be an optocoupler relay, the controlled end of the optocoupler relay is connected to the controller to input a bypass control signal, and the output end of the optocoupler relay is respectively connected to the first electrode of the first battery cell, the first electrode of the second battery cell, and the second electrode of the second battery cell, so that the optocoupler relay can selectively connect the first electrode of the first battery cell to the first electrode of the second battery cell or the second electrode of the second battery cell under the control of the bypass control signal.

[0090] Continue to refer Figure 4 For the i-th battery cell Celli, the first end of the loop selection switch 220 is electrically connected to the end of the first guide member 210, the first end of the loop selection switch 220 is connected to the switching member, the second end of the loop selection switch 220 is electrically connected to the second electrode V+ of the battery cell Celli, and the third end of the loop selection switch 220 is electrically connected to the first electrode V- of the battery cell Celli.

[0091] It should be noted that the electrical connection between the loop selection switch 220 and the first guide member 210 can be connected by a wiring harness or by a flexible circuit board PCB, depending on actual needs, and this disclosure does not make any specific limitations.

[0092] In the embodiment of the present disclosure, the first flow guide 210 and the circuit selection switch 220 can conveniently and quickly selectively connect the battery cell 111 in the series connection circuit under the action of the bypass control signal, thereby isolating the faulty battery cell 111 and improving the effectiveness and reliability of the battery module.

[0093] Continue to refer Figure 4 In one embodiment, the first current guide 210 includes a current-carrying plug 211 and an insulating first connector 212. The first connector 212 is provided with a first pole fixing hole 2121 that matches with the pole of the battery cell 111. A conductor is provided in the first pole fixing hole 2121. The circuit selection switch 220 is provided on the first connector 212. The circuit selection switch 220 is electrically connected to the current-carrying plug 211 and the conductor, for example, through a lead wire. A plug-in slot 2122 is provided on the side wall of the first connector 212 corresponding to the first electrode of the first battery cell, and a current-carrying plug 211 is provided on the side wall of the first connector 212 corresponding to the second electrode of the second battery cell. When the current-carrying plug 211 matches with the plug-in slot 2122, the current-carrying plug 211 extends to the first electrode of the first battery cell and makes electrical contact. The first pole fixing hole 2121 includes a fixing hole corresponding to the positive pole of the battery cell 111, and also includes a fixing hole corresponding to the negative pole of the battery cell 111.

[0094] The current-carrying plug 211 may be made of a conductive material, or a portion of the current-carrying plug 211 may be made of a conductive material. The conductive material may include but is not limited to metal materials such as gold, silver, copper, aluminum, or a combination of multiple metal materials, or other semiconductor materials with conductive properties may also be used, and the present disclosure does not make specific limitations on this.

[0095] When the current-carrying plug 211 is conductive as a whole, the current-carrying plug 211 can be integrally formed with the insulating first connector 212 through an injection molding process; or a mounting groove can be provided at a position corresponding to the first connector 212, and the current-carrying plug 211 can be inserted into the mounting groove through interference fit.

[0096] The first connector 212 may be made of plastic, glass, ceramic, resin, high polymer, etc. The inner diameter of the first pole fixing hole 2121 is greater than or equal to the pole diameter of the battery cell 111 , and the shape of the first pole fixing hole 2121 may be consistent with the pole of the battery cell 111 .

[0097] For the two first connectors 212 corresponding to the first battery cell and the second battery cell, a current-carrying plug 211 can be set on the side wall of one of the first connectors 212, and a plug-in slot 2122 matching the current-carrying plug 211 can be set on the side wall of the other first connector 212. The shape of the plug-in slot 2122 is consistent with the outer contour of the current-carrying plug 211. The depth of the plug-in slot 2122 can ensure that the current-carrying plug 211 can be electrically contacted with the battery cell 111 pole after insertion, thereby connecting the first battery cell and the second battery cell in series.

[0098] After the current-carrying plug 211 and the first connector 212 are fixed, the circuit selection switch 220 can be installed on the surface of the first connector 212. The circuit selection switch 220 can be electrically connected to the current-carrying plug 211 and the conductor through a wire harness such as a metal wire or an FPC.

[0099] The conductor provided in the first pole fixing hole 2121 can be a metal material of the inner wall of the first pole fixing hole 2121. The first pole fixing hole 2121 can be a cylindrical blind hole. The inner wall of the first pole fixing hole 2121 is coated with a metal material. The metal material can include but is not limited to gold, silver, copper, aluminum, etc.

[0100] Figure 5 and Figure 6 The three-dimensional diagram and the exploded diagram of the cooperation between the multiple battery cells 111 and the multiple isolation structures 200 are shown. Figure 5 and Figure 6 As shown, the battery module can be obtained by sequentially plugging adjacent current-carrying plugs 211 into corresponding plug-in slots 2122 and sleeve-fitting the first connector 212 onto the corresponding battery cell 111 .

[0101] In the embodiment of the present disclosure, by providing an insulating first connector 212 and a conductive current-carrying plug 211, on the one hand, a series connection of multiple battery cells 111 is achieved, and on the other hand, it is convenient to organically combine the circuit selection switch 220 with the first current guide member 210, so that the structure of the battery module is miniaturized.

[0102] like Figure 7 and Figure 8 As shown, in one embodiment, a chamfer is set at the end of the current-carrying plug 211, for example, the end chamfer of the current-carrying plug 211 is 50°, or the end of the current-carrying plug 211 is rounded, thereby reducing the friction between the current-carrying plug 211 and the plug-in slot 2122, maintaining good metal conductivity, and reducing the internal resistance of the current-carrying plug 211.

[0103] Continue to refer Figure 7 and Figure 8In one embodiment, one of the two adjacent first connecting members 212 is a strip plate, the other first connecting member 212 is an L-shaped plate, and the current-carrying plug 211 is arranged on the short side of the L-shaped first connecting member 212. Since the distances between the poles of the adjacent battery cells 111 are the same, the current-carrying plug 211 arranged on the short side of the L-shaped first-stage connecting member 212 and the current-carrying plug 211 arranged on the side wall of the strip-shaped first connecting member 212 have different lengths exposed from the first connecting member 212, thereby playing a fool-proof role and improving the installation efficiency and accuracy of the isolation structure 200.

[0104] Continue to refer Figure 3 In one embodiment, the circuit selection switch 220 is connected to the controller 230 , and the controller 230 corresponding to the first battery cell and the controller 230 corresponding to the second battery cell are connected and communicate through the power line.

[0105] The controller 230 has communication capabilities and can implement functions such as circuit conduction detection, voltage detection, temperature detection, and low power consumption detection. The controller 230 can collect performance data such as voltage and temperature of the battery cell 111. The battery management system determines whether the battery cell 111 is faulty based on the collected performance data. When the battery cell 111 operates normally, a bypass control signal of the first state is generated to electrically connect the first electrode and the second electrode of the adjacent battery cell 111. At the same time, the controllers 230 corresponding to the adjacent battery cells 111 can communicate through PCL, and the performance data collected by each controller 230 is passed to the next controller 230, until the last controller 230 summarizes the performance data of all battery cells 111 and sends it to the master control BMS or other receivers.

[0106] When a fault occurs in the battery cell 111 , the BMS generates a bypass control signal and sends it to the controller 230 . The controller 230 controls the loop selection switch 220 to connect the first electrode of the first battery cell with the first electrode of the second battery cell and disconnect the first electrode of the first battery cell with the second electrode of the second battery cell under the action of the bypass control signal, thereby isolating the faulty battery cell 111 .

[0107] In one embodiment, the power supply of the controller 230 may come from the corresponding battery cell 111 , such as the working power supply + of the controller 230 is connected to the V- of the battery cell Celli-1, and the working power supply - of the controller 230 is connected to the V- of the battery cell Celli.

[0108] In the embodiment of the present disclosure, one battery cell 111 can be managed by one collection, the management of the battery module can be highly centralized, the concept of the primary board is eliminated, and the space requirement of the battery pack is reduced.

[0109] Fig. 9 FIG. 2 is a schematic diagram showing the structure of another battery module provided by an embodiment of the present disclosure. Figure 2 Compared with the embodiment, the isolation structure 200 and the connection method between the isolation structure 200 and the battery cell 111 are further simplified. Fig. 9 As shown, in another embodiment, the isolation structure 200 can be further simplified. The isolation structure 200 includes a second flow guide 240 and a bypass member 250. One end of the second flow guide 240 is connected to the first electrode of the first battery cell, and the other end of the second flow guide 240 is connected to the second electrode of the second battery cell, so that the multiple battery cells 111 are connected in series; one end of the bypass member 250 is connected to the first electrode of the first battery cell, and the other end of the bypass member 250 is connected to the second electrode of the first battery cell, and the controlled end of the bypass member 250 inputs the bypass control signal.

[0110] In one embodiment, the first electrode of the first battery cell and the second electrode of the second battery cell are connected in sequence through the second current guide 240, so that the multiple battery cells 111 are connected in series, and the bypass element 250 is connected in parallel with the corresponding battery cells 111. When the battery cells 111 work normally, the battery cells 111 are connected in series. At this time, the bypass control signal can be in a high-impedance state, or the bypass control signal is not output; when the battery cell 111 fails, the circuit where the bypass element 250 is located is turned on under the control of the bypass control signal, so that the faulty battery cell 111 is bypassed through the isolation structure 200, and the faulty battery cell 111 is isolated.

[0111] Continue to refer Fig. 9 , the bypass element 250 may include a controller 230, a light emitting device 251 and a photosensitive device 252, the light emitting device 251 and the photosensitive device 252 are arranged opposite to each other, the light emitting device 251 is connected to the controller 230, and the two ends of the photosensitive device 252 are electrically connected to the first electrode and the second electrode of the corresponding battery cell respectively. For example, the battery cell Celli-1 and the battery cell Celli are adjacent battery cells 111, the negative electrode of the battery cell Celli-1 is connected to the positive electrode of the battery cell Celli, the battery cell Celli-1 and the battery cell Celli are respectively connected in parallel with the corresponding photosensitive device 252, and the controller i-1 and the controller i are respectively connected to the corresponding light emitting device 251.

[0112] In one embodiment, the light emitting device 251 is at least one of a light emitting diode and an organic light emitting diode; the photosensitive device 252 includes at least one of a phototransistor and a photosensitive diode, which is not specifically limited in the present disclosure.

[0113] exist Fig.10In the figure, battery cells Celli-1 and battery cell Celli are two adjacent battery cells 111, and the negative electrode of battery cell Celli-1 and the positive electrode of Celli are connected through the second guide member 240, thereby realizing the series connection of multiple battery cells 111; the positive and negative electrodes of battery cell Celli are connected in parallel to the bypass member 250, and the bypass member 250 includes a controller 230 and an optocoupler switch Oci, so that when a battery cell 111 fails, the controller 230 controls the light-emitting device 251 to turn on according to the bypass control signal generated by the BMS, thereby bypassing the battery cell Celli and realizing the isolation of the faulty battery cell 111.

[0114] The light emitting device 251 and the photosensitive device 252 are arranged opposite to each other. When the controller 230 turns on the circuit where the light emitting device 251 is located, the light emitting device 251 emits light of a preset wavelength to illuminate the light receiving surface of the photosensitive device 252. The photosensitive device 252 is turned on under the irradiation of light, and the positive and negative electrodes of the battery cell 111 are electrically connected, thereby bypassing the battery cell 111 and isolating the faulty battery cell 111.

[0115] In one embodiment, the light emitting device 251 may include but is not limited to a light emitting diode, an organic light emitting diode, etc.; the photosensitive device 252 may include at least one of a phototransistor and a photosensitive diode. The present disclosure does not specifically limit the types of the light emitting device 251 and the photosensitive device 252.

[0116] In one embodiment, the controller 230 corresponding to the first battery cell and the controller 230 corresponding to the second battery cell are connected and communicate through a power line.

[0117] In the embodiment of the present disclosure, adjacent battery cells 111 are directly connected via the second flow guide member 240, and the bypass member 250 is connected in parallel with the corresponding battery cell 111. When the battery cell 111 fails, the controller 230 controls the light-emitting device 251 to be turned on according to the bypass control signal generated by the BMS, thereby isolating the faulty battery cell 111 and greatly simplifying the structure of the battery module.

[0118] Fig.10 The schematic diagram of another battery module provided by the embodiment of the present disclosure is shown. For the adjacent first battery cell and second battery cell, the connection relationship between the battery cell Celli and the battery cell Celli-1 is used as an example for explanation, and the connection relationship of other battery cells 111 can refer to the above example, which will not be repeated in the present disclosure.

[0119] like Fig.10 As shown, the first electrode V- of the battery cell Celli-1 is connected to the second electrode V+ of the battery cell Celli through the second guide member 240; the second electrode V+ of the battery cell Celli is connected to one end of the photosensitive device 252, the first electrode V- of the battery cell Celli is connected to the other end of the photosensitive device 252, and the controller 230 is connected to the light-emitting device 251.

[0120] It should be noted that Fig.10 The specific implementation method and related functions of the controller 230 of the embodiment are as follows: Figure 3 The implementation method and function of the controller 230 in the embodiment are the same and will not be described again here.

[0121] In the embodiment of the present disclosure, the connection relationship of the battery cell 111 is controlled by the controller 230, the light-emitting device 251, and the photosensitive device 252. When a battery cell 111 fails, the connection circuit of the battery cell 111 is switched to directly isolate the faulty battery cell 111 without stopping the energy storage system, thereby improving the user experience. One battery cell 111 is connected to one isolation structure 200, which can achieve the effect of highly centralized management of the battery cell 111.

[0122] like Fig.11 As shown, in one embodiment, the second flow guide 240 includes a plug-in connector 241 and an insulating second connector 242, the second connector 242 is provided with a second pole fixing hole 2421 that cooperates with the pole of the battery cell 111; a connecting groove 2422 is provided on the side wall of the second connector 242 corresponding to the first electrode of the first battery cell, and a plug-in connector 241 is provided on the side wall of the second connector 242 corresponding to the second electrode of the first battery cell, and when the plug-in connector 241 cooperates with the connecting groove 2422, two ends of the plug-in connector 241 extend to the first electrode of the first battery cell and the second electrode of the second battery cell respectively, and the plug-in connector 241 is in electrical contact with the first electrode of the first battery cell and the second electrode of the second battery cell.

[0123] In one embodiment, the bypass member 250 is disposed on the second connecting member 242, and the second connecting member 242 is provided with a first wire and a second wire. The bypass member 250 is electrically connected to the first electrode of the first battery cell through the first wire, and the bypass member 250 is electrically connected to the second electrode of the first battery cell through the second wire.

[0124] In one embodiment, a chamfer is set at the end of the connector 241, for example, the end chamfer of the connector 241 is 50°, or the end of the connector 241 is rounded, thereby reducing the friction between the connector 241 and the connecting groove 2422, maintaining good metal conductivity, and reducing the internal resistance of the connector 241.

[0125] Continue to refer Fig.11 In one embodiment, one of the two adjacent second connectors 242 is a strip plate, and the other connector is an L-shaped plate, and the plug-in connector 241 is disposed on the short side of the L-shaped plate. Since the distances between the poles of the adjacent cells 111 are the same, the length of the second connector 242 exposed by the plug-in connector 241 disposed on the short side of the L-shaped connecting plate and the plug-in connector 241 disposed on the side wall of the strip plate is different, thereby playing a foolproof role and improving the installation efficiency and accuracy of the isolation structure 200.

[0126] The connector 241 may be made of a conductive material, or a portion of the connector 241 may be made of a conductive material. The conductive material may include but is not limited to metal materials such as gold, silver, copper, aluminum, or a combination of multiple metal materials. Other semiconductor materials with conductive properties may also be used, and the present disclosure does not make any specific limitations on this.

[0127] When the connector 241 is conductive as a whole, the connector 241 can be integrally formed with the insulating second connector 242 through an injection molding process; or a mounting groove can be provided at a corresponding position of the second connector 242, and the connector 241 can be inserted into the mounting groove through interference fit.

[0128] The second connector 242 may be made of plastic, glass, ceramic, resin, high polymer, etc. The inner diameter of the second pole fixing hole 2421 is greater than or equal to the pole diameter of the battery cell 111 , and the shape of the second pole fixing hole 2421 may be consistent with the pole of the battery cell 111 .

[0129] For the two second connectors 242 corresponding to the first battery cell and the second battery cell, a plug-in connector 241 can be set on the side wall of one of the second connectors 242, and a connecting groove 2422 matching with the plug-in connector 241 can be set on the side wall of the other second connector 242. The shape of the connecting groove 2422 is consistent with the outer contour of the plug-in connector 241. The depth of the connecting groove 2422 can ensure that the plug-in connector 241 can be electrically contacted with the battery cell 111 pole after insertion, thereby connecting the first battery cell and the second battery cell in series.

[0130] The first conductive wire and the second conductive wire may be a wire harness or a lead structure in an FPC, which is not specifically limited in the present disclosure.

[0131] like Fig.11 As shown, the side wall of the second connector 242 corresponding to the second electrode of the second battery cell is connected to the plug-in connector 241, and the side wall of the second connector 242 corresponding to the first electrode of the first battery cell is provided with a connecting groove 2422, the plug-in connector 241 and the connecting groove 2422 of the same second connector 242 are respectively located on both sides of the second connector 242, one end of the plug-in connector 241 can extend to the second electrode of the second battery cell to electrically contact the second electrode of the second battery cell, and the other end of the plug-in connector 241 is inserted into the connecting groove 2422 of the adjacent second connector 242 to electrically contact the first electrode of the first battery cell, thereby realizing the series connection of adjacent battery cells 111.

[0132] It should be noted that the specific implementation of this embodiment is different from the connection relationship of the previous embodiment only in that the connection relationship between the flow guide and the electrode of the battery cell 111 is different, and it is only necessary to adjust the structure of the connecting member.

[0133] Based on this, the present disclosure also provides a battery pack, as described in the following embodiments. Since the principle of solving the problem in the device embodiment is similar to that in the above-mentioned battery module embodiment, the implementation of the power pack embodiment can refer to the implementation of the above-mentioned battery module embodiment, and the repeated parts will not be repeated.

[0134] The disclosed embodiment also provides a battery pack, which includes a box and the battery module in the above embodiment, and the battery module is placed in the box. In this way, combined with the above battery module, the safety of the battery pack and the energy storage system can be improved, and the battery pack has a wider range of applications.

[0135] It should be noted that, although several modules or units of the device for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiments of the present disclosure, the features and functions of two or more modules or units described above can be embodied in one module or unit. On the contrary, the features and functions of one module or unit described above can be further divided into multiple modules or units to be embodied.

[0136] In addition, although the steps of the method in the present disclosure are described in a specific order in the drawings, this does not require or imply that the steps must be performed in this specific order, or that all the steps shown must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps, etc.

[0137] Through the description of the above implementation, it is easy for those skilled in the art to understand that the example implementation described here can be implemented by software, or by software combined with necessary hardware. Therefore, the technical solution according to the implementation of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, including several instructions to enable a computing device (which can be a personal computer, a server, a mobile terminal, or a network device, etc.) to execute the method according to the implementation of the present disclosure.

[0138] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A battery module, characterized in that: include: A plurality of battery cells and a plurality of isolation structures connected to the first output terminal and the second output terminal of the battery module, wherein one battery cell and one isolation structure are provided correspondingly, the isolation structure comprises an end isolation structure, and the battery cell comprises a first end battery cell connected to the first output terminal; Wherein, the first end of the end isolation structure is connected to the first output end, the second end of the end isolation structure is connected to the second electrode of the first end battery cell, and the third end of the end isolation structure is connected to the first electrode of the first end battery cell; An isolation structure is connected between adjacent battery cells, wherein a first end of the isolation structure is electrically connected to a first electrode of a first battery cell, a second end of the isolation structure is electrically connected to a second electrode of a second battery cell, and a third end of the isolation structure is electrically connected to a first electrode of the second battery cell. The first battery cell and the second battery cell are adjacent battery cells, and the polarities of the first electrode and the second electrode of each battery cell are opposite. The isolation structure is controlled by a bypass control signal. When the bypass control signal is in a first state, the first electrode of the first battery cell is electrically connected to the second electrode of the second battery cell. When the bypass control signal is in a second state, the first electrode of the first battery cell is electrically connected to the first electrode of the second battery cell.

2. The battery module according to claim 1, characterized in that: The isolation structure includes a first flow guide and a circuit selection switch; Wherein, one end of the first flow guide is connected to the first electrode of the first battery cell, and the other end of the first flow guide is connected to the first end of the circuit selection switch; A switching element is connected to the first end of the circuit selection switch, a second end of the circuit selection switch is electrically connected to the second electrode of the second battery cell, a third end of the circuit selection switch is electrically connected to the first electrode of the second battery cell, and the switching element is selectively connected to the second end or the third end of the circuit selection switch under the control of the bypass control signal.

3. The battery module according to claim 2, characterized in that: The first current guide member includes a current-carrying plug and an insulating first connecting member, the first connecting member is provided with a first pole fixing hole matched with a pole of the battery cell, a conductor is provided in the first pole fixing hole, the circuit selection switch is provided on the first connecting member, and the circuit selection switch is electrically connected to the current-carrying plug and the conductor; A plug-in slot is provided on the side wall of the first connector corresponding to the first electrode of the first battery cell, and the current-carrying plug is provided on the side wall of the first connector corresponding to the second electrode of the second battery cell. When the current-carrying plug is matched with the plug-in slot, the current-carrying plug extends to the first electrode of the first battery cell and makes electrical contact.

4. The battery module according to claim 3, characterized in that: The end of the current-carrying plug is chamfered.

5. The battery module according to claim 3, characterized in that: One of the two adjacent first connecting members is a strip-shaped plate, and the other connecting plate is an L-shaped plate. The current-carrying plug is arranged on the short side of the L-shaped plate.

6. The battery module according to claim 1, characterized in that: The isolation structure includes a second flow guide and a bypass member; Wherein, one end of the second current guide is connected to the first electrode of the first battery cell, and the other end of the second current guide is connected to the second electrode of the second battery cell, so that the multiple battery cells are connected in series; One end of the bypass element is connected to the first electrode of the first battery cell, the other end of the bypass element is connected to the second electrode of the first battery cell, and the controlled end of the bypass element inputs the bypass control signal.

7. The battery module according to claim 6, characterized in that: The bypass device includes a controller, a light emitting device and a photosensitive device. The light emitting device and the photosensitive device are arranged opposite to each other. The light emitting device is electrically connected to the controller. Two ends of the photosensitive device are electrically connected to the first electrode and the second electrode of the first battery cell respectively.

8. The battery module according to claim 6, characterized in that: The second flow guide member includes a plug-in member and an insulating second connecting member, and the second connecting member is provided with a second pole fixing hole matched with the pole of the battery cell; A connecting groove is provided on the side wall of the second connector corresponding to the first electrode of the first battery cell, and the plug-in connector is provided on the side wall of the second connector corresponding to the second electrode of the second battery cell. When the plug-in connector cooperates with the connecting groove, two ends of the plug-in connector respectively extend to the first electrode of the first battery cell and the second electrode of the second battery cell and are in electrical contact with the first electrode and the second electrode.

9. The battery module according to claim 8, characterized in that: The bypass member is arranged on the second connecting member, the second connecting member is provided with a first wire and a second wire, the bypass member is electrically connected to the first electrode of the first battery cell through the first wire, and the bypass member is electrically connected to the second electrode of the first battery cell through the second wire.

10. A battery pack, characterized in that: The invention comprises a box body and at least one battery module according to any one of claims 1 to 9.

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