Battery pack and electronic equipment

Abstract

The invention relates to the technical field of power supplies, in particular to a battery pack and electronic equipment, and the battery pack comprises a battery cell module and a battery control circuit electrically connected with the battery cell module; the port module is used for being connected with a load in an inserted mode, and a port positive electrode pin of the port module is connected with a battery positive electrode pin of the battery cell module; the communication isolation module is connected between the battery control circuit and the port module, an isolation grounding pin of the communication isolation module is connected with a port grounding pin of the port module, and when the port grounding pin is disconnected from a load grounding pin of the load, the isolation grounding pin is in a suspended state; and the communication isolation module responds to the suspended state of the isolation grounding pin to enter a working stop state so as to cut off a target loop formed by the cell module, the load, the port module, the communication isolation module and the battery control circuit. And at the moment, the communication isolation module prohibits the voltage output by the battery cell module from flowing back to the battery control circuit, so that the stability of the battery pack is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power supplies, and in particular to a battery pack and electronic equipment. Background Art

[0002] With the rapid development of the drone industry, the number, voltage and current of the battery packs carried by drones are increasing, providing drones with sufficient power to meet the flight needs of drones. As the number of battery packs increases, communication problems with high-voltage batteries also arise, especially during hot-swap operations. If the negative pole is disconnected first, the high voltage generated instantly will surge to the communication port, causing serious damage to the components inside the battery. Summary of the invention

[0003] The embodiments of the present invention provide a battery pack and an electronic device, aiming to solve the technical problem in the related art that high voltage is easily backflowed into the battery during hot plugging and thus damaging the internal components of the battery.

[0004] In order to solve the above technical problems, a technical solution adopted in the embodiment of the present invention is: to provide a battery pack, comprising:

[0005] A battery cell module, including a positive battery pin and a negative battery pin;

[0006] A battery control circuit, electrically connected to the battery module;

[0007] A port module, used for plugging with a load, comprising a port positive pin and a port ground pin, wherein the port positive pin is electrically connected to the battery positive pin, and the load comprises a load positive pin and a load ground pin;

[0008] A communication isolation module is electrically connected between the battery control circuit and the port module, the communication isolation module includes an isolation ground pin, the isolation ground pin is electrically connected to the port ground pin, when the port positive pin is electrically connected to the load positive pin but the port ground pin is disconnected from the load ground pin, the isolation ground pin is in a suspended state, and the communication isolation module enters a working stop state in response to the suspended state of the isolation ground pin to cut off the target loop formed by the battery cell module, the load, the port module, the communication isolation module and the battery control circuit.

[0009] Optionally, the port module further includes a port communication pin, the load further includes a load communication pin, the battery control circuit includes a battery communication pin, and the communication isolation module is electrically connected between the battery communication pin and the port communication pin;

[0010] When the port positive pin is electrically connected to the load positive pin, but the port ground pin is disconnected from the load ground pin, the communication isolation module maintains communication interaction with the battery control circuit based on the battery communication pin.

[0011] Optionally, the communication isolation module includes:

[0012] A first communication isolation circuit, electrically connected to the battery control circuit based on the battery communication pin;

[0013] The second communication isolation circuit is electrically connected to the first communication isolation circuit and is also electrically connected to the port communication pin and the port ground pin, respectively. The second communication isolation circuit is provided with the isolation ground pin. When the port ground pin is disconnected from the load ground pin, the second communication isolation circuit stops working in response to the suspended state of the isolation ground pin. The first communication isolation circuit maintains communication interaction with the battery control circuit based on the battery communication pin.

[0014] Optionally, the first communication isolation circuit includes a first side ground pin and a first side communication pin, the first side ground pin is electrically connected to the battery negative electrode pin, and the first side communication pin is electrically connected to the battery communication pin.

[0015] Optionally, the second communication isolation circuit includes:

[0016] A second side communication pin electrically connected to the port communication pin;

[0017] The second side ground pin is electrically connected to the port ground pin, and the second side ground pin is the isolation ground pin. When the port ground pin is connected to the load ground pin, the second side ground pin is connected to the negative electrode pin of the battery through the port ground pin. The second side communication isolation circuit interacts with the load communication based on the second side communication pin and the load communication pin. When the port ground pin is disconnected from the load ground pin, the second side ground pin is in a suspended state.

[0018] Optionally, the battery control circuit includes:

[0019] A battery management chip, electrically connected to the battery module, and used to detect working data of the battery module;

[0020] A signal acquisition circuit, electrically connected to the battery management chip, for collecting environmental data of the battery module;

[0021] The controller is respectively connected to the battery management chip and the communication isolation module for controlling the battery management chip to communicate with the communication isolation module.

[0022] Optionally, the signal acquisition circuit includes:

[0023] A temperature detection circuit, electrically connected to the battery management chip, for detecting the temperature of the battery module;

[0024] A current detection circuit is electrically connected to the negative electrode pin of the battery and to the battery management chip, and is used to detect current data of the battery cell module.

[0025] Optionally, the port module also includes a port control pin, and the controller is configured with a reset pin, and the port control pin is electrically connected to the reset pin, and is used to transmit the control signal sent by the load to the battery management chip, so that the battery management chip controls the charging and discharging state of the battery module.

[0026] Optionally, the battery pack also includes an anti-backflow circuit, which is electrically connected between the reset pin and the port control pin, and is used to prevent current from the port module from flowing back to the controller when the port ground pin is disconnected from the load ground pin.

[0027] In order to solve the above technical problems, another technical solution adopted by the embodiment of the present invention is: to provide an electronic device, comprising

[0028] load; and

[0029] A battery pack as described above.

[0030] Different from the related art, the present invention provides a battery pack and an electronic device, wherein the battery pack includes a battery cell module, including a battery positive pin and a battery negative pin; a battery control circuit, electrically connected to the battery cell module; a port module, used to be plugged into a load, including a port positive pin and a port ground pin, the port positive pin is electrically connected to the battery positive pin, and the load includes a load positive pin and a load ground pin; a communication isolation module, electrically connected between the battery control circuit and the port module, the communication isolation module includes an isolation ground pin, the isolation ground pin is electrically connected to the port ground pin, when the port positive pin is electrically connected to the load positive pin, but the port ground pin is disconnected from the load ground pin, the isolation ground pin is in a suspended state, and the communication isolation module enters a working stop state in response to the suspended state of the isolation ground pin to cut off the target loop formed by the battery cell module, the load, the port module, the communication isolation module and the battery control circuit. At this time, when the battery cell module outputs voltage to the port module, the voltage will be isolated by the communication isolation module, thereby preventing the voltage output by the battery cell module from flowing back into the battery control circuit, thereby improving the stability of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] One or more embodiments are exemplarily described by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and the figures in the drawings do not constitute proportional limitations unless otherwise stated.

[0032] Figure 1 is a structural block diagram of an electronic device provided by an embodiment of the present invention;

[0033] Figure 2 is a structural block diagram of a battery pack provided by an embodiment of the present invention;

[0034] Figure 3 is a structural block diagram of a communication isolation module provided by an embodiment of the present invention;

[0035] Figure 4 is a circuit diagram of a battery pack provided by an embodiment of the present invention;

[0036] Figure 5 It is a structural block diagram of a battery management circuit provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] It should be noted that, if there is no conflict, the various features in the embodiments of the present invention can be combined with each other, and all are within the protection scope of the present invention. In addition, although the functional modules are divided in the device schematic diagram and the logical order is shown in the flow chart, in some cases, the steps shown or described can be performed in a different order from the module division in the device schematic diagram or the order in the flow chart.

[0039] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0040] At present, when a battery pack is needed to power a load, the battery pack is plugged into the load. At this time, the positive port of the battery pack, the load, and the negative port of the battery pack form a power supply loop, and the battery pack powers the load based on the power supply loop. While powering the load, the battery pack communicates with the load based on the communication port to determine information such as the power supply voltage of the load.

[0041] However, when the battery pack is supplying power to the load, the battery pack may be hot-plugged. At this time, if the negative port of the battery pack is disconnected from the load first or the positive port of the battery pack is connected to the load first, the positive port of the battery pack, the load, and the communication port of the battery pack will form a loop, so that the high voltage output by the positive port of the battery pack will be fed back to the battery pack through the communication port, thereby damaging the battery pack.

[0042] Therefore, in order to solve the above technical problems, the related technology sets a Zener diode in the battery pack, the cathode of the Zener diode is connected to the communication port, and the anode of the Zener diode serves as the voltage output terminal.

[0043] When the battery pack is hot-plugged and the negative port is disconnected first or the positive port is connected first, the high voltage output from the positive port of the battery pack will be input to the cathode of the voltage regulator tube, thereby suppressing the high voltage output from the positive port through the voltage regulation characteristics of the voltage regulator tube. However, when the positive port outputs a continuous high voltage, the voltage regulator tube will be broken down by the continuous high voltage, so that the high voltage is input to the battery pack through the voltage regulator tube, thereby damaging the battery pack.

[0044] Alternatively, the related technology customizes a terminal that contacts the negative electrode first through mold customization, but the applicability of mold customization is low, different terminals need to be designed for different products, and the customization cycle is too long, which leads to an increase in the cost of the battery pack.

[0045] Based on this, the embodiment of the present application sets a communication isolation module in the communication loop between the battery pack and the load, so that the battery pack must pass through the communication isolation module to communicate and interact with the load. At this time, when the battery pack is hot-plugged and the positive port is contacted earlier than the negative port, or hot-pulled and the positive port is disconnected later than the negative port, if the communication loop is not isolated by the communication isolation module, then when the power supply circuits of the positive port, the load and the negative port of the battery pack are disconnected, the high voltage of the positive port of the battery pack will be backflowed into the battery pack through the communication port, thereby damaging the battery pack. By setting the communication isolation module in the communication loop, the high voltage output from the positive port can be isolated through the communication isolation module when the above situation occurs, thereby ensuring that the high voltage will not be backflowed into the battery pack, thereby increasing the service life of the battery pack.

[0046] Hereinafter, the present application provides a battery pack, which can be applied to electronic devices. Figure 1 , Figure 1 is a structural block diagram of an electronic device provided by an embodiment of the present invention, such as Figure 1 As shown, the electronic device 1 includes a battery pack 100 and a load 200 , wherein the battery pack 100 is used to be plugged into the load 200 , and when plugged into the load 200 , outputs a supply voltage to the load 200 to power the load 200 .

[0047] In some embodiments, when the load 200 is an electrical device, such as a drone, a model car, a remote-controlled aircraft, an electric wrench, etc., the battery pack 100 is used to output voltage to the electrical device to power the electrical device.

[0048] In another embodiment, when the load 200 is a charging device, such as an energy storage power source, a photovoltaic input source, etc., the battery pack 100 is used to receive the electrical energy input by the load 200 and convert the electrical energy into chemical energy for storage.

[0049] Please refer to Figure 2 , Figure 2 is a structural block diagram of a battery pack provided by an embodiment of the present invention, such as Figure 2 As shown, the battery pack 100 includes a battery cell module 10, a battery control circuit 20, a port module 30 and a communication isolation module 40;

[0050] The battery cell module 10 includes a battery negative electrode pin N1 and a battery positive electrode pin N2;

[0051] In some embodiments, Figure 2 As shown, the battery module 10 includes a charge and discharge circuit 11 and a plurality of battery cells 12 . The charge and discharge circuit 11 is connected to the plurality of battery cells 12 . The charge and discharge circuit 11 is also connected to the battery control circuit 20 .

[0052] The charging and discharging circuit 11 is used to receive the driving signal output by the battery control circuit 20, and control the charging or discharging of the plurality of battery cells 12 based on the driving signal. When the plurality of battery cells are charging, the charging and discharging circuit 11 receives the external input electric energy, and inputs the electric energy into the plurality of battery cells 12, so that the plurality of battery cells convert the electric energy into chemical energy for storage; or when discharging, receives the converted electric energy output by the plurality of battery cells 12, and outputs the electric energy to the load 200, thereby supplying power to the load 200.

[0053] Each of the plurality of battery cells 12 is connected in series. When the plurality of battery cells 12 are in a charging state, the plurality of battery cells 12 are charged synchronously to avoid overcharging or undervoltage of the battery cells; and when the plurality of battery cells 12 are in a discharging state, the plurality of battery cells 12 are discharged synchronously to provide stable current and voltage.

[0054] The battery control circuit 20 is electrically connected to the battery cell module 10 .

[0055] The port module 30 includes a port positive pin M1 and a port ground pin M3 for plugging with the load 200. The port positive pin M1 is electrically connected to the battery positive pin N2. The load 200 includes a load positive pin L2 and a load ground pin L1.

[0056] The communication isolation module 40 is electrically connected between the battery control circuit 20 and the port module 30. The communication isolation module 40 includes an isolation ground pin M4, and the isolation ground pin M4 is electrically connected to the port ground pin M3. When the port positive pin M1 is electrically connected to the load positive pin L2, but the port ground pin M3 is disconnected from the load ground pin L1, the isolation ground pin M4 is in a suspended state. The communication isolation module 40 enters a working stop state in response to the suspended state of the isolation ground pin M4 to cut off the target loop formed by the battery cell module 10, the load 200, the port module 30, the communication isolation module 40 and the battery control circuit 20.

[0057] It can be known that during the plugging process between the port module 30 and the load 200, when the port positive pin M1 is electrically connected to the load positive pin L2, if the battery module 10 is in a discharge state (battery pack hot plug), the voltage of the battery module 10 will flow into the port positive pin M1 through the battery positive pin N2. At this time, if the port ground pin M3 is electrically connected to the load ground pin L1, the port ground pin M3 is connected to the battery negative pin N1, and the voltage output by the battery module 10 will flow back to the battery module 10 through the port module 30 and the load 200, thereby powering the load 200. At this time, the load 200 and the battery pack 100 communicate and interact normally. If the port ground pin M3 is disconnected from the load ground pin L1, the voltage output by the battery module 10 will flow back to the battery control circuit 20 through the communication pin of the port module 30 and the communication isolation module 40. Once the voltage output by the battery module 10 exceeds the maximum withstand voltage of the battery control circuit 20, the battery control circuit 20 will be damaged, thereby reducing the stability of the battery pack 100. It can be understood that the hot-plug process of the battery pack is similar to the principle of the hot-plug process described above, and will not be repeated in this embodiment.

[0058] Therefore, in the embodiment of the present application, the communication isolation module 40 is configured to electrically connect the isolation ground pin M4 with the port ground pin M3. When the port ground pin M3 is disconnected from the load ground pin L1, the isolation ground pin M4 is in a suspended state, and the communication isolation module 40 enters a work stop state. At this time, when there is high voltage in the port module 30, the voltage will be isolated by the communication isolation module 40, thereby prohibiting the voltage output by the battery cell module 10 from being fed back to the battery control circuit 20, thereby improving the stability of the battery pack.

[0059] In some embodiments, see Figure 2 , the port module 30 further includes a port communication pin M2, the load 200 further includes a load communication pin L3, the battery control circuit 20 includes a battery communication pin M5, and the communication isolation module 40 is electrically connected between the battery communication pin M5 and the port communication pin M2;

[0060] When the port positive pin M1 is electrically connected to the load positive pin L2, but the port ground pin M3 is disconnected from the load ground pin L1, the communication isolation module 40 maintains communication interaction with the battery control circuit 20 based on the battery communication pin M5.

[0061] It should be noted that the communication isolation module 40 is mainly used to prevent the voltage output by the battery positive pin N2 from flowing back to the battery control circuit 20 through the communication isolation module 40 when the load ground pin L1 is disconnected from the port ground pin M3. Therefore, during the operation of the battery pack 100, the communication isolation module 40 will still communicate and interact with the battery control circuit 20, but whether to communicate and interact with the load 200 also needs to determine whether the port ground pin M3 is connected to the load ground pin L1.

[0062] When the battery control circuit 20 is connected to the battery module 10, the battery control circuit 20 is used to output a discharge signal to the battery module 10 so that the battery module 10 starts to discharge. After the battery module 10 is discharged, the battery control circuit 20 is also used to obtain the working data (output voltage, output current, etc.) of the battery module 10, and transmit the working data to the communication isolation module 40. At this time, if the port module 30 is plugged into the load 200 (i.e., hot plugged) and the port ground pin M3 is electrically connected to the load ground pin L1, the isolation ground pin M4 is connected to the battery negative electrode pin N1 through the port ground pin M3, and the communication isolation module 40 starts to work, so that the battery module 10, the load 200, the port module 30, the communication isolation module 40 and the battery control circuit 20 form a target loop. The battery control circuit 20 can transmit the working data to the load 200 based on the target loop, so that the load 200 determines the current working data. After the load 200 obtains the current working data, if the current working data needs to be modified, the modified data will be sent to the communication isolation module 40, so that the modified data is sent to the battery control circuit 20 based on the communication isolation module 40. After receiving the modified data, the battery control circuit 20 modifies the output voltage and output current of the battery module 10 based on the modified data to meet the working requirements of the load 200. Based on this, the communication interaction between the battery control circuit 20 and the load 200 can be realized.

[0063] Furthermore, when the load ground pin L1 is disconnected from the port ground pin M3, the isolation ground pin M4 is in a suspended state, so that the communication isolation module 40 enters a work stop state. At this time, the target loop is cut off, and the battery control circuit 20 also stops communicating with the load 200. At the same time, since the target loop is cut off, the high voltage in the port module 30 is prohibited from flowing back to the battery control circuit 20, thereby preventing the components in the battery control circuit 20 from being damaged.

[0064] In some embodiments, see Figure 3 The communication isolation module 40 includes a first communication isolation circuit 41 and a second communication isolation circuit 42.

[0065] The first communication isolation circuit 41 is electrically connected to the battery control circuit 20 based on the battery communication pin M5;

[0066] The second communication isolation circuit 42 is electrically connected to the first communication isolation circuit 41 and is also electrically connected to the port communication pin M2 and the port ground pin M3, respectively. The second communication isolation circuit 42 is provided with the isolation ground pin M4. When the port ground pin M3 is disconnected from the load ground pin L1, the second communication isolation circuit 42 stops working in response to the suspended state of the isolation ground pin M4. The first communication isolation circuit 41 maintains communication interaction with the battery control circuit 20 based on the battery communication pin M5.

[0067] In some embodiments, please combine Figure 2 and Figure 3 , when the battery module 10 starts working, the first communication isolation circuit 41 is used to receive the working data output by the battery control circuit 20. If the port ground pin M3 is electrically connected to the load ground pin L1, the isolation ground pin M4 of the second communication isolation circuit 42 is connected to the negative electrode pin N1 of the battery through the port ground pin M3, the load ground pin L1 (that is, forming a power supply circuit), and the second communication isolation circuit 42 starts working. At this time, the second communication isolation circuit 42 starts to receive the working data output by the first communication isolation circuit 41, and outputs the working data to the load 200. When the load 200 feeds back modified data based on the working data, the second communication isolation circuit 42 is used to receive the modified data and transmit the modified data to the first communication isolation circuit 41, so as to feed back the modified data to the battery control circuit 20 through the first communication isolation circuit 41, thereby modifying the output voltage and output current of the battery module 10. Then, the communication interaction between the battery control circuit 20 and the load 200 is realized.

[0068] In another embodiment, when the port ground pin M3 is disconnected from the load ground pin L1, the second communication isolation circuit 42 disconnects the power supply circuit between the battery negative pin N1 and stops working. At this time, the second communication isolation circuit 42 stops transmitting data between the first communication isolation circuit 41 and the load 200; at the same time, the high voltage in the port module 30 is also isolated by the second communication isolation circuit 42, thereby protecting the battery control circuit 20 from damage, thereby improving the reliability of the battery pack 100.

[0069] In some embodiments, see Figure 3 , the first communication isolation circuit 41 includes a first-side ground pin M8 and a first-side communication pin M7;

[0070] The first-side ground pin M8 is electrically connected to the battery negative electrode pin N1 , and the first-side communication pin M7 is electrically connected to the battery communication pin M5 .

[0071] When the first-side ground pin M8 is connected to the battery negative electrode pin N1 , the first communication isolation circuit 41 communicates and interacts with the battery control circuit 20 based on the first communication pin M7 .

[0072] In yet another embodiment, see Figure 3 and Figure 2 , the second communication isolation circuit 42 includes a second-side communication pin M6 and a second-side ground pin, wherein the second-side ground pin is the isolation ground pin M4;

[0073] The second side communication pin M6 is electrically connected to the port communication pin M2;

[0074] The second side ground pin M4 is electrically connected to the port ground pin M3. When the port ground pin M3 is connected to the load ground pin L1, the second side ground pin M4 is connected to the battery negative pin N1 through the port ground pin M3. The second side communication isolation circuit 42 communicates and interacts with the load 200 based on the second side communication pin M6 and the load communication pin L3. When the port ground pin M3 is disconnected from the load ground pin L1, the second side ground pin M4 is in a suspended state.

[0075] When the port ground pin M3 is connected to the load ground pin L1, the second side ground pin M4 is connected to the battery negative pin N1 through the port ground pin M3. At this time, the second communication isolation circuit 42 starts to work, and the second side communication isolation circuit 42 communicates and interacts with the load 200 based on the second side communication pin M6 and the load communication pin L3. When the port ground pin M3 is disconnected from the load ground pin L1, the second side ground pin M4 is suspended, that is, the second communication isolation circuit 42 is not grounded. At this time, the second communication isolation circuit 42 stops working due to the lack of a power supply circuit, thereby stopping the communication interaction between the battery control circuit 20 and the load 200.

[0076] See also Figure 4In some embodiments, the port module 30 includes six pins, the first pin is the positive pin of the port, and the sixth pin is connected to the negative pin N1 of the battery. The first pin and the sixth pin are mainly used to receive the voltage output by the battery module 10 to realize power supply for the load 200. The second pin and the third pin are port communication pins. During communication, the working data output by the communication isolation module 40 is received through the second pin, and the modified data output by the load 200 is sent through the third pin. The fourth pin is the port ground pin. When the port ground pin is connected to the load ground pin, the fourth pin and the sixth pin of the port module 30 are connected to each other, so that the isolation ground pin M4 is connected to the negative pin N1 of the battery; and when the port ground pin is disconnected from the load ground pin, the isolation ground pin M4 is in a suspended state, so that the second communication isolation circuit 42 stops working. The fifth pin is a port control pin.

[0077] In yet another embodiment, see Figure 4 , the communication isolation circuit 40 is an isolation chip U3, wherein the left side of the isolation chip U3 is a first communication isolation circuit 41, and the right side of the isolation chip U3 is a second communication isolation circuit 42. The ground pin on the left side of the isolation chip U3 is connected to the negative electrode pin N1 of the battery, and the communication pin M8 is connected to the battery control circuit 20. The ground pin M4 on the right side of the isolation chip U3 is connected to the fourth pin of the port module 30, and the communication pin M6 of the isolation chip U3 is connected to the port communication pin of the port module 30. Optionally, the model of the isolation chip U3 is CAIS3642LVW. In some embodiments, other types of chips with the same functions as the chip CAIS3642LVW can also be used as the isolation chip U3.

[0078] What we know is that Figure 4 Being out is determined based on the connection between the port ground pin and the load ground pin. When the port ground pin is disconnected from the load ground pin, the ground pin M4 on the second side (right side) of the isolation chip U3 is in a suspended state. At this time, the second side of the isolation chip U3 stops working due to the lack of a power supply circuit; when the port ground pin is connected to the load ground pin, the second side ground pin M4 (i.e., pin 9 and pin 15) of the isolation chip U3 is electrically connected to the battery negative electrode pin N1 through the port module 30. At this time, the 9th pin of the isolation chip U3, the port module 30, the load 200 and the battery negative electrode pin N1 form a loop, the ground terminal of the second side of the isolation chip U3 is no longer suspended, and the second side of the isolation chip U3 starts to work.

[0079] In some embodiments, Figure 4 The first side communication pin M8 of the isolation chip U3 includes a signal receiving pin M8' and a signal sending pin M8", and the second side communication pin M6 includes a signal receiving pin M6' and a signal sending pin M6". When the battery control circuit 20 communicates with the load 200, the isolation chip U3 receives the working data output by the battery control circuit 20 through the signal receiving pin M8' on the first side, and after receiving the working data, sends the working data to the load 200 through the signal sending pin M6" on the second side. And the modified data is fed back through the signal receiving pin M6' on the second side, and the modified data is fed back to the battery management circuit 20 through the signal sending pin M8" on the first side, thereby realizing the communication interaction between the battery management circuit 20 and the load 200.

[0080] In some embodiments, by controlling the power pins and ground pins on the left and right sides of the isolation chip U3 to connect to different power supplies and ground terminals, it is ensured that the signals on both sides of the isolation chip U3 do not interfere with each other, thereby improving the signal quality while avoiding a ground loop in the form of a shared ground terminal, further enhancing electrical safety.

[0081] It can be known that, in some embodiments, the isolation chip U3 is an isolation chip that integrates isolated power and signals, that is, in the process of chip integration, an isolated power supply is integrated in the integrated chip. The isolated power supply is used to provide power supply for the second side of the isolation chip U3, and the power supply is provided by the isolated power supply to prevent the high voltage from forming a loop with the second side power supply pin (pin 16 of the isolation chip U3) when the battery is hot-swapped, thereby further improving the safety of the circuit.

[0082] See also Figure 5 , in some embodiments, the battery control circuit 20 includes a battery management chip 21, a signal acquisition circuit 22 and a controller 23;

[0083] The battery management chip 21 is electrically connected to the battery module 10 and is used to detect the working data of the battery module 10;

[0084] The signal acquisition circuit 22 is electrically connected to the battery management chip 21 and is used to collect environmental data of the battery module 21;

[0085] The controller 23 is connected to the battery management chip 21 and the isolation module communication 40 respectively, and is used to control the battery management chip 21 to communicate and interact with the communication isolation module 40.

[0086] Specifically, when it is necessary to control the charging and discharging of the battery module 10, the battery management chip 21 outputs a driving signal to the battery module 10 to start charging or discharging the battery module 10. After the battery module 10 starts charging and discharging, the battery management chip 21 detects the voltage of each battery cell in the battery module 10 and the output voltage, output current and other working data of the battery module 10, and transmits the working data to the controller 23, so that the controller 23 transmits the working data to the communication isolation module 40.

[0087] After the controller 23 transmits the working data to the communication isolation module 40, it also receives the modification data fed back by the communication isolation module 40, and transmits the modification data to the battery management chip 21, so that the battery management chip 21 controls the working state of the battery module 10 based on the modification data, and then adjusts the output voltage and output current of the battery module 10. Based on this, the communication interaction between the battery management chip 21 and the communication isolation module 40 can be realized through the controller 23.

[0088] In another embodiment, when the battery module 10 starts to charge and discharge, the battery management chip 21 will also collect environmental data such as the temperature and discharge current of the battery module 10 in real time based on the signal acquisition circuit 22, and determine whether the battery module 10 has overcurrent, overdischarge or abnormal temperature based on the environmental data. If so, a shutdown signal is output to the battery module to stop the charging and discharging of the battery module 10.

[0089] In some embodiments, please combine Figure 4 , the charging and discharging circuit 10 includes a first field effect transistor Q1 and a second field effect transistor Q2;

[0090] The gate of the first field effect transistor Q1 and the gate of the second field effect transistor Q2 are respectively connected to the battery management chip 21, the source of the first field effect transistor Q1 is connected to the battery positive pin N2 of the battery cell module 10, the drain of the first field effect transistor Q1 is connected to the drain of the second field effect transistor Q2, and the source of the second field effect transistor Q2 is connected to the port positive pin of the port module 30.

[0091] When the battery management chip 21 outputs a driving signal, the first field effect transistor Q1 is turned on because the conduction condition is met, and the second field effect transistor Q2 is also turned on. When the first field effect transistor Q1 and the second field effect transistor Q2 are turned on, the voltage of the battery module 10 is output to the port positive pin M1 of the port module 30 through the battery positive pin N2, the first field effect transistor Q1 and the second field effect transistor Q2. At this time, if the port module 30 and the load 200 are in a plug-in state, the load 200 can be powered by the port module 30.

[0092] In some embodiments, if the load 200 is a power supply device, that is, when the port module 30 is plugged into the load 200 , a voltage is input to the battery positive pin N2 through the port module 30 , the second field effect transistor Q2 , and the first field effect transistor Q1 , thereby charging the battery cell module 10 .

[0093] Wherein, the first field effect transistor and the second field effect transistor are N-channel field effect transistors.

[0094] In some embodiments, please combine Figure 5 , the signal acquisition circuit 22 includes a temperature detection circuit 221 and a current detection circuit 222;

[0095] The temperature detection circuit 221 is electrically connected to the battery management chip 21 and is used to detect the temperature of the battery module 10;

[0096] The current detection circuit 222 is electrically connected to the battery negative electrode pin N1 and to the battery management chip 21 , and is used to detect current data of the battery cell module 10 .

[0097] After the battery module 10 starts to charge and discharge, the battery management chip 21 will detect the battery temperature of the battery module 10 in real time based on the temperature detection circuit 221, and detect the current signal in the circuit based on the current measurement circuit 222, and control the battery module 10 to stop charging and discharging when the temperature of the battery module 10 is abnormal and / or the current signal in the circuit is too large, so as to avoid over-discharge or over-temperature of the battery module 10, thereby improving the stability of the battery module 10.

[0098] In some embodiments, see Figure 4 The temperature detection circuit 222 includes a resistor R1, and the resistor R1 is connected to the temperature detection pin of the battery detection chip 21. The resistor R1 is a thermistor, and its resistance value changes with the change of temperature. Based on this, it can be detected and judged whether the resistance value of the resistor R1 is within the preset range. If not, it can be determined that the temperature of the battery module 10 is abnormal.

[0099] In some embodiments, the current detection circuit 222 includes a resistor R2, and the resistor R2 is respectively connected to the battery negative electrode pin N2, the port ground pin M3, and the battery management chip 21. When the battery module 10 starts to charge and discharge, the output voltage of the battery positive electrode pin N2 will flow through the port module 30 and the resistor R2 and then return to the battery negative electrode pin N1; at this time, the battery management chip 21 will detect the voltage on the resistor R2, and amplify the voltage several times and convert it into a digital signal, so as to determine whether the battery module 10 has an overcurrent or other conditions based on the digital signal.

[0100] See also Figure 4 In some embodiments, the controller 23 is configured with a reset pin (REST), which is electrically connected to the port control pin of the port module 30. The port module 30 is used to transmit the control signal sent by the load 200 to the battery management chip 21, so that the battery management chip 21 controls the charge and discharge state of the battery module 10.

[0101] It can be known that when the positive pin of the load is connected to the positive pin of the port, and the negative pin of the load is connected to the ground pin of the port, if the battery module 10 is in a stationary state, the user will output a control signal based on the load. When the port module 30 receives the control signal, it will output the control signal to the controller 23 through the port control pin, so that the controller 23 controls the battery management chip 21 to drive the charge and discharge circuit 11 to work, thereby causing the battery module 10 to discharge.

[0102] In another embodiment, please refer to Figure 2 The battery pack 100 also includes an anti-backflow circuit 50, which is electrically connected between the reset pin M10 and the port control pin M9, and is used to prevent the current from the port module 30 from flowing back to the controller 23 when the port ground pin M3 is disconnected from the load ground pin L1.

[0103] Please combine Figure 4 In some embodiments, the anti-backflow circuit 50 includes a voltage regulator D1, a cathode of the voltage regulator D1 is connected to the port control pin, and an anode of the voltage regulator D1 is connected to the reset pin. When the load 200 is unplugged from the port module 30, based on the voltage regulation characteristics of the voltage regulator D1, the current in the port module 30 is isolated, thereby protecting the controller 23 and improving the stability of the circuit.

[0104] In some embodiments, when the port ground pin is connected to the load ground pin, if the battery cell module 10 is in a stationary state, the controller 23 receives the control signal output by the port module 30, and controls the battery management chip 21 based on the control signal to drive the first field effect transistor Q1 and the second field effect transistor Q2 to turn on, thereby starting to power the load 200 through the port positive pin and the port ground pin.

[0105] If the battery module 10 is in a power supply state, the load 200 is plugged into the port module 30 and the ground pin on the second side of the isolation chip U3 is grounded, the battery control chip 21 will obtain the working data and environmental data of the battery module 10 in real time, and transmit the working data to the controller 23, so that the controller 23 transmits the working data to the load 200 through the isolation chip U3. If the load 200 needs to modify the power supply situation, it will send the modification data to the isolation chip U3 according to the demand, but after receiving the modification data, the isolation chip U3 will send the modification data to the controller 23, so that the controller 23 will send the modification data to the battery management chip 21, so that the battery management chip 21 adjusts the working data of the battery module 10. Based on this, when the battery pack 100 is electrically connected to the load 200, communication interaction can be achieved while powering the load 200.

[0106] When the battery module 10 is in the power supply state and the load 200 is disconnected from the port module 30, the ground pin on the second side of the isolation chip U3 is suspended, and the second side of the isolation chip U3 stops transmitting information. At this time, even if the positive pin N2 of the battery is still outputting voltage for the port module 30, and the negative pin N1 of the battery is disconnected from the port ground pin, the high voltage on the port module 30 will not be fed back into the controller 23 and the battery management chip 21, thereby protecting the controller 23 and the battery management chip 21 from damage, thereby improving the stability of the battery pack.

[0107] An embodiment of the present invention provides a battery pack, which includes a battery cell module, including a battery positive pin and a battery negative pin; a battery control circuit, which is electrically connected to the battery cell module; a port module, which is used to be plugged into a load, including a port positive pin and a port ground pin, the port positive pin is electrically connected to the battery positive pin, and the load includes a load positive pin and a load ground pin; a communication isolation module, which is electrically connected between the battery control circuit and the port module, the communication isolation module includes an isolation ground pin, the isolation ground pin is electrically connected to the port ground pin, when the port positive pin is electrically connected to the load positive pin, but the port ground pin is disconnected from the load ground pin, the isolation ground pin is in a suspended state, and the communication isolation module enters a working stop state in response to the suspended state of the isolation ground pin to cut off the target loop formed by the battery cell module, the load, the port module, the communication isolation module and the battery control circuit. At this time, when the battery cell module outputs voltage to the port module, the voltage will be isolated by the communication isolation module, thereby preventing the voltage output by the battery cell module from flowing back into the battery control circuit, thereby improving the stability of the battery pack.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they may still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, 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 invention.

Claims

1. A battery pack, characterized in that: include: A battery cell module, including a positive battery pin and a negative battery pin; A battery control circuit, electrically connected to the battery module; A port module, used for plugging with a load, comprising a port positive pin and a port ground pin, wherein the port positive pin is electrically connected to the battery positive pin, and the load comprises a load positive pin and a load ground pin; A communication isolation module is electrically connected between the battery control circuit and the port module, the communication isolation module includes an isolation ground pin, the isolation ground pin is electrically connected to the port ground pin, when the port positive pin is electrically connected to the load positive pin but the port ground pin is disconnected from the load ground pin, the isolation ground pin is in a suspended state, and the communication isolation module enters a working stop state in response to the suspended state of the isolation ground pin to cut off the target loop formed by the battery cell module, the load, the port module, the communication isolation module and the battery control circuit.

2. The battery pack according to claim 1, characterized in that: The port module further includes a port communication pin, the load further includes a load communication pin, the battery control circuit includes a battery communication pin, and the communication isolation module is electrically connected between the battery communication pin and the port communication pin; When the port positive pin is electrically connected to the load positive pin, but the port ground pin is disconnected from the load ground pin, the communication isolation module maintains communication interaction with the battery control circuit based on the battery communication pin.

3. The battery pack according to claim 2, characterized in that: The communication isolation module comprises: A first communication isolation circuit, electrically connected to the battery control circuit based on the battery communication pin; The second communication isolation circuit is electrically connected to the first communication isolation circuit and is also electrically connected to the port communication pin and the port ground pin, respectively. The second communication isolation circuit is provided with the isolation ground pin. When the port ground pin is disconnected from the load ground pin, the second communication isolation circuit stops working in response to the suspended state of the isolation ground pin. The first communication isolation circuit maintains communication interaction with the battery control circuit based on the battery communication pin.

4. The battery pack according to claim 3, characterized in that: The first communication isolation circuit includes a first side ground pin and a first side communication pin, the first side ground pin is electrically connected to the battery negative electrode pin, and the first side communication pin is electrically connected to the battery communication pin.

5. The battery pack according to claim 3, characterized in that: The second communication isolation circuit comprises: A second side communication pin electrically connected to the port communication pin; The second side ground pin is electrically connected to the port ground pin, and the second side ground pin is the isolation ground pin. When the port ground pin is connected to the load ground pin, the second side ground pin is connected to the negative electrode pin of the battery through the port ground pin. The second side communication isolation circuit interacts with the load communication based on the second side communication pin and the load communication pin. When the port ground pin is disconnected from the load ground pin, the second side ground pin is in a suspended state.

6. The battery pack according to any one of claims 1 to 5, characterized in that: The battery control circuit comprises: A battery management chip, electrically connected to the battery module, and used to detect working data of the battery module; A signal acquisition circuit, electrically connected to the battery management chip, for collecting environmental data of the battery module; The controller is respectively connected to the battery management chip and the communication isolation module for controlling the battery management chip to communicate with the communication isolation module.

7. The battery pack according to claim 6, characterized in that: The signal acquisition circuit comprises: A temperature detection circuit, electrically connected to the battery management chip, for detecting the temperature of the battery module; A current detection circuit is electrically connected to the negative electrode pin of the battery and to the battery management chip, and is used to detect current data of the battery cell module.

8. The battery pack according to claim 6, characterized in that: The port module also includes a port control pin, and the controller is configured with a reset pin. The port control pin is electrically connected to the reset pin and is used to transmit the control signal sent by the load to the battery management chip so that the battery management chip controls the charging and discharging state of the battery module.

9. The battery pack according to claim 8, characterized in that: The battery pack also includes an anti-backflow circuit, which is electrically connected between the reset pin and the port control pin, and is used to prevent current from the port module from flowing back to the controller when the port ground pin is disconnected from the load ground pin.

10. An electronic device, characterized in that: include: load; and A battery pack as claimed in any one of claims 1 to 9.

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