CN219226542U

CN219226542U - Battery unit and battery pack

Info

Publication number: CN219226542U
Application number: CN202320140967.4U
Authority: CN
Inventors: 徐博; 张迪; 冯凯; 蔡超军; 吕琦
Original assignee: Galaxyspace Beijing Communication Technology Co ltd
Current assignee: Galaxyspace Beijing Communication Technology Co ltd
Priority date: 2023-02-07
Filing date: 2023-02-07
Publication date: 2023-06-20
Anticipated expiration: 2033-02-07

Abstract

The application discloses battery cell and group battery includes: a battery; a series switch connected in series with the battery; the parallel switch is connected in parallel with a series circuit formed by the battery and the series switch; and the control module is used for controlling the opening and closing of the series switch and the parallel switch so as to conduct one of the series switch and the parallel switch. The control module in the application can simultaneously control the opening and closing of the series switch and the opening and closing of the parallel switch, so that one of the series switch and the parallel switch is conducted, and therefore all the switches corresponding to the batteries in the battery unit can be controlled by only one control wire, and whether the battery unit is used for supplying power or not is controlled, and the application of a power management system and control equipment is reduced.

Description

Battery unit and battery pack

Technical Field

The present disclosure relates to power management, and more particularly, to a battery unit and a battery pack.

Background

A battery pack is generally composed of a plurality of battery cells connected in series. As shown in fig. 1, each battery cell 100 has a battery 101 and a series switch (series switch 102) connected in series with the battery for controlling whether the battery is in conduction with a main circuit; the battery unit further comprises a bypass switch (parallel switch 103) connected in parallel with the circuit formed by the battery and the series switch for directly conducting the battery unit to the main circuit without passing through the battery. When the battery is abnormal or the battery is not connected to the main circuit, the bypass switch needs to be controlled to be closed so that the bypass of the battery unit is directly conducted with the main circuit, and the series switch needs to be opened at the moment so as to avoid internal short circuit of the battery unit. In the prior art, two control modules are usually required to control the opening and closing of the series switch and the bypass switch respectively, so that the steps are more, and more equipment is required.

Aiming at the technical problems that two control modules are needed to respectively control the opening and closing of a series switch and a bypass switch of a battery unit in the prior art, the steps are more, and needed equipment is more, no effective solution is proposed at present.

Disclosure of Invention

The utility model provides a battery unit and a battery pack, which at least solve the technical problems that the battery unit in the prior art needs two control modules to respectively control the opening and closing of a series switch and a bypass switch, and has more steps and more needed equipment.

According to one aspect of the present application, there is provided a battery cell including: a battery; a series switch connected in series with the battery; the parallel switch is connected in parallel with a series circuit formed by the battery and the series switch; and the control module is used for controlling the opening and closing of the series switch and the parallel switch so as to conduct one of the series switch and the parallel switch.

Optionally, the control module includes a connector and an inverter; the first output end of the connector is connected with the series switch; the second output end of the connector is connected with the parallel switch; the input end of the connector is used for accessing the control signal; an inverter is connected between the first output and the series switch.

Optionally, the control module includes a connector and an inverter; the first output end of the connector is connected with the series switch; the second output end of the connector is connected with the parallel switch; the input end of the connector is used for accessing the control signal; the inverter is connected between the second output terminal and the parallel switch.

Optionally, the series switch comprises: a first series switch connected to the negative electrode of the battery; and a second series switch connected to the positive electrode of the battery.

Optionally, the control module includes a connector and an inverter; the first output end of the connector is connected with the first series switch; the second output end of the connector is connected with the parallel switch; the third output end of the connector is connected with the second series switch; the input end of the connector is used for accessing the control signal; the inverter is connected between the second output terminal and the parallel switch.

According to another aspect of the present application, there is provided a battery pack including a controller and a plurality of battery cells in any one of the above-mentioned technical solutions, wherein the plurality of battery cells are connected to the controller.

Optionally, the battery pack further comprises a matrix switcher; the matrix switcher is connected between the plurality of battery cells and the controller.

The control module can simultaneously control the opening and closing of the series switch and the parallel switch, so that one of the series switch and the parallel switch is conducted, and therefore, all the switches corresponding to the batteries in the battery unit can be controlled by only one control wire, and whether the battery unit is used for supplying power or not is controlled, and the application of a power management system and control equipment is reduced. Further, a matrix switcher is connected between a plurality of battery units and the controller in the battery pack, and the matrix switcher can select the batteries in one part of the battery units in the battery pack to supply power, and the batteries in the other part of the battery units are not used for supplying power, and are controlled by outputting a control signal through one pin of the controller.

The above, as well as additional objectives, advantages, and features of the present utility model will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present utility model when read in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the present application will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:

fig. 1 is a schematic circuit diagram of a conventional battery cell according to the background of the utility model.

Fig. 2 is a schematic circuit diagram of a battery cell according to an embodiment of the utility model.

Fig. 3 is a schematic circuit diagram of a battery cell according to another embodiment of the utility model.

Fig. 4 is a schematic circuit diagram of a battery cell according to another embodiment of the utility model.

Fig. 5 is a schematic circuit diagram of a battery pack according to an embodiment of the present utility model.

Wherein, the correspondence between the reference numerals and the component names in fig. 1 to 5 is:

10. a battery pack; 100. a battery unit; 101. a battery; 102. a series switch; 102a, a first series switch; 102b, a second series switch; 103. a parallel switch; 104. a connector; 105. an inverter; 200. a matrix switcher; 300. and a controller.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the utility model described herein are, for example, capable of operation in other environments. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

Currently, the battery unit 100 of the related art requires more wires to be connected to the controller 300 of the power management system, thereby resulting in more complicated wiring of the power management system.

To solve the above problems, as shown in fig. 2, 3 and 4, an embodiment of the present utility model provides a battery cell 100 including: a battery 101; a series switch 102 connected in series with the battery 101; a parallel switch 103 connected in parallel with a series circuit constituted by the battery 101 and the series switch 102; and the control module is used for controlling the opening and closing of the series switch 102 and the opening and closing of the parallel switch 103 so as to enable one of the series switch 102 and the parallel switch 103 to be conducted.

In this embodiment, the battery cell 100 includes: the series switch 102 is connected with the battery 101 in series, the series switch 102 is conducted, and the battery 101 is connected into a main circuit; the series switch 102 is non-conductive and the battery 101 is disconnected from the main circuit. The parallel switch 103 is connected in parallel with the series circuit formed by the battery 101 and the series switch 102, and when the battery 101 fails or is abnormal, the parallel switch 103 may be closed to place the main circuit in a conductive state, and in order to avoid an internal short circuit of the battery unit 100, the series switch 102 needs to be placed in a non-conductive state. The control module can control the on/off of the series switch 102 and the on/off of the parallel switch 103 at the same time, so that one of the series switch 102 and the parallel switch 103 is turned on, and therefore, all the switches corresponding to the batteries 101 in the battery unit 100 can be controlled by only one control line, thereby controlling whether the battery unit 100 is used for supplying power or not, and reducing the application of a power management system and control equipment.

In one embodiment of the present application, as shown in fig. 2, the control module includes a connector 104 and an inverter 105; a first output of the connector 104 is connected to the series switch 102; the second output end of the connector 104 is connected with the parallel switch 103; the input end of the connector 104 is used for accessing the control signal; an inverter 105 is connected between the first output and the series switch 102.

In this embodiment, the series switch 102 and the parallel switch 103 in the battery cell 100 may be transistor switches, i.e., closed when a high level is input, open when a low level is input, or vice versa. The output end of the connector 104 is respectively connected with the series switch 102 and the parallel switch 103; an inverter 105 is connected between the first output terminal and the series switch 102, and when the first output terminal and the second output terminal of the connector 104 output the same level, the series switch 102 and the parallel switch 103 receive different levels, so that when the series switch 102 is closed, the parallel switch 103 is opened, or when the series switch 102 is opened, the parallel switch 103 is closed, and then, only a control signal controlling the input terminal of the connector 104 is required to enable one of the series switch 102 and the parallel switch 103 to be turned on, thereby controlling whether the battery unit 100 is used for power supply.

In one embodiment of the present application, as shown in fig. 3, the control module includes a connector 104 and an inverter 105; a first output of the connector 104 is connected to the series switch 102; the second output end of the connector 104 is connected with the parallel switch 103; the input end of the connector 104 is used for accessing the control signal; an inverter 105 is connected between the second output and the parallel switch 103.

In this embodiment, the same principle as in the previous embodiment, the inverter 105 is connected between the second output terminal and the parallel switch 103, and when the first output terminal and the second output terminal of the connector 104 output the same voltage level, the serial switch 102 and the parallel switch 103 receive different levels, so that when the serial switch 102 is conductive, the parallel switch 103 is not conductive, or when the serial switch 102 is non-conductive, the parallel switch 103 is conductive, so that only a control signal for controlling the input terminal of the connector 104 is needed to make one of the serial switch 102 and the parallel switch 103 conductive.

In one embodiment of the present application, the series switch 102 includes: a first series switch 102a connected to the negative electrode of the battery 101; and a second series switch 102b connected to the positive electrode of the battery 101.

In this embodiment, for protection of the battery 101 in the battery unit 100 or to avoid influencing the whole main circuit due to a failure of the battery 101, both the positive and negative poles of the battery 101 are provided with switches, i.e. the first series switch 102a and the second series switch 102b comprised by the first series switch 102a, when the battery unit 100 is not required to be connected to the main circuit. When the battery cell 100 is not required to be connected to the main circuit, both the first series switch 102a and the second series switch 102b need to be in a non-conductive state, and the parallel switch 103 needs to be in a conductive state.

In one embodiment of the present application, as shown in fig. 4, the control module includes a connector 104 and an inverter 105; a first output of the connector 104 is connected to the first series switch 102a; the second output end of the connector 104 is connected with the parallel switch 103; the third output of the connector 104 is connected to the second series switch 102 b; the input end of the connector 104 is used for accessing the control signal; an inverter 105 is connected between the second output and the parallel switch 103.

Optionally, an inverter 105 is connected between the first output and the first series switch 102a, and between the third output and the second series switch 102b, but this way two inverters 105 are required, the amount of equipment is large, and therefore, it is preferable to provide an inverter 105 between the second output and the parallel switch 103.

Another aspect of the present application proposes a battery pack 10, including a controller 300 and a plurality of battery units 100 in any of the above-mentioned aspects, where the plurality of battery units 100 are all connected to the controller 300. Since the battery pack 10 includes the battery cells 100 of any one of the above-described aspects, the battery pack 10 has all the advantages and benefits of the above-described aspects, and the plurality of battery cells 100 can be controlled by a control signal output from one pin of the controller 300 for power supply.

In one embodiment of the present application, as shown in fig. 5, the battery pack 10 further includes a matrix switcher 200; the matrix switcher 200 is connected between the plurality of battery cells 100 and the controller 300.

In this embodiment, a matrix switcher 200 is connected between the plurality of battery cells 100 and the controller 300, and by means of the matrix switcher 200, the batteries 101 in one part of the battery cells 100 in the plurality of battery packs 10 can be selected for power supply, the batteries 101 in the other part of the battery cells 100 are not used for power supply, and the control is performed by outputting a control signal from one pin of one controller 300.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

The foregoing is merely a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present application should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A battery cell (100), characterized by comprising:

a battery (101); a series switch (102) connected in series with the battery (101); a parallel switch (103) connected in parallel with a series circuit formed by the battery (101) and the series switch (102);

and the control module is used for controlling the opening and closing of the series switch (102) and the parallel switch (103) so as to conduct one of the series switch (102) and the parallel switch (103).

2. The battery unit (100) of claim 1, wherein the control module comprises a connector (104) and an inverter (105);

-a first output of the connector (104) is connected to the series switch (102); a second output end of the connector (104) is connected with the parallel switch (103); the input end of the connector (104) is used for accessing a control signal;

the inverter (105) is connected between the first output and the series switch (102).

3. The battery unit (100) of claim 1, wherein the control module comprises a connector (104) and an inverter (105);

the inverter (105) is connected between the second output and the parallel switch (103).

4. The battery cell (100) of claim 1, wherein the series switch (102) comprises:

a first series switch (102 a) connected to the negative electrode of the battery (101); and

and a second series switch (102 b) connected to the positive electrode of the battery (101).

5. The battery unit (100) of claim 4, wherein the control module comprises a connector (104) and an inverter (105);

-a first output of the connector (104) is connected to the first series switch (102 a); a second output end of the connector (104) is connected with the parallel switch (103); a third output of the connector (104) is connected to the second series switch (102 b); the input end of the connector (104) is used for accessing a control signal; and

6. A battery pack (10) comprising a controller (300) and a plurality of battery cells (100) as claimed in claim 1, each of the plurality of battery cells (100) being connected to the controller (300).

7. The battery pack (10) of claim 6, further comprising a matrix switcher (200);

the matrix switcher (200) is connected between the plurality of battery cells (100) and the controller (300).