Connector and battery pack

Abstract

The utility model provides a connector, which is used for electrically connecting a battery controller with voltage sampling points of battery cells in a battery module, and comprises a plurality of connecting assemblies, one ends of the connecting assemblies are electrically connected with the voltage sampling points of the battery cells in a one-to-one correspondence manner, and the other ends of the connecting assemblies are electrically connected with pins of the battery controller in a one-to-one correspondence manner; the voltage sampling points comprise a negative sampling point and a plurality of positive sampling points, and a first mechanical switch is connected in series with the connecting assembly connected with the negative sampling point. According to the utility model, instantaneous current can be prevented from being generated when the battery controller is plugged and unplugged so as to protect the front-end analog chip. The utility model further provides a battery pack.

Description

Technical Field

[0001] The utility model relates to the field of battery protection, and particularly to a connector and a battery pack. Background Art

[0002] A lithium-ion energy storage system is composed of multiple battery packs, and multiple mutually parallel or series-connected battery cells are arranged inside each battery pack. To timely understand the usage situation of the battery, it is necessary to set a battery controller in the battery pack, and the battery controller monitors the voltages of each battery cell. The battery controller includes a front-end analog chip and a main chip. The front-end analog chip is used to collect the battery cell voltage and send it to the main chip for data processing after analog / digital conversion. When manufacturing a lithium-ion energy storage system, multiple sampling lines electrically connected to the battery cells are led out from the battery pack, multiple pins are led out from the battery controller, and each sampling line is electrically connected to each pin in one-to-one correspondence.

[0003] In the prior art, each pin of the battery controller and each sampling line are plugged and connected through a connector. However, a large instantaneous current is easily generated during hot plugging of the connector. Since there is a parasitic diode between the voltage acquisition pin and the equalization pin of the front-end chip of the battery controller, the instantaneous current will break down the parasitic diode during hot plugging of the connector, resulting in damage to the front-end analog chip. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the technical problem that an instantaneous current is easily generated during hot plugging of the battery controller. The utility model provides a connector and a battery pack, which can prevent an instantaneous current from being generated when plugging and unplugging the battery controller to protect the front-end analog chip.

[0005] To solve the above technical problem, an embodiment of the utility model provides a connector for electrically connecting a battery controller to the voltage sampling points of each battery cell in a battery module. The connector includes:

[0006] A plurality of connection components, one end of each connection component is electrically connected to the voltage sampling points of each battery cell in one-to-one correspondence, and the other end is electrically connected to each pin of the battery controller in one-to-one correspondence;

[0007] The voltage sampling points include a negative electrode sampling point and a plurality of positive electrode sampling points, and a first mechanical switch is connected in series on the connection component connected to the negative electrode sampling point.

[0008] Optionally, a second mechanical switch is connected in series on each connection component connected to each positive electrode sampling point.

[0009] Optionally, the connection component includes a voltage sampling line and a conductor, wherein:

[0010] The voltage sampling line includes a negative sampling line and multiple positive sampling lines. The negative sampling line is electrically connected to the negative sampling point, and each positive sampling line is electrically connected to each positive sampling point in a one-to-one correspondence.

[0011] Each conductor is respectively used to electrically connect each voltage sampling line to each pin of the battery controller in a one-to-one correspondence.

[0012] Optionally, the connector further includes a main housing. Each conductor is disposed in the main housing in isolation. A first socket housing is provided at one end of the main housing, and pins are provided at the ends of each conductor located within the first socket housing.

[0013] Optionally, the main housing is disposed on the battery controller, and each pin is electrically connected to each conductor respectively; the first socket housing is provided at one end of the main housing away from the battery controller; the connector further includes a first plug, and multiple first jacks for conducting electricity are provided inside the first plug. Each first jack is electrically connected to the output end of each voltage sampling line in a one-to-one correspondence; when the first plug is plugged into the first socket housing, each pin can be inserted into each first jack and is electrically connected to the conductor.

[0014] Optionally, the main housing is disposed on the battery module, and each voltage sampling line is electrically connected to each conductor respectively; the first socket housing is provided at one end of the main housing away from the battery module; the connector further includes a second plug, and multiple second jacks for conducting electricity are provided inside the second plug. Each second jack is electrically connected to each pin in a one-to-one correspondence; when the second plug is plugged into the first socket housing, each pin can be inserted into each second jack and is electrically connected to the conductor.

[0015] Optionally, a third plug is further provided at the other end of the main housing; a first plug is provided on the battery module. When the first plug is plugged into the first socket housing, each voltage sampling line is electrically connected to each conductor in a one-to-one correspondence; a second socket housing is provided on the battery controller. When the third plug is plugged into the second socket housing, each pin is electrically connected to each conductor in a one-to-one correspondence.

[0016] Optionally, a first mechanical switch is connected in series on the negative sampling line;

[0017] Optionally, a first mechanical switch is connected in series on the conductor connected to the negative sampling line, and the operating end of the first mechanical switch protrudes outside the main housing.

[0018] An embodiment of the present utility model further provides a battery pack, including any one of the aforementioned connectors.

[0019] Compared with the prior art, the present utility model has the following beneficial effects:

[0020] In an embodiment of the present utility model, a first mechanical switch is connected in series on a connection component electrically connected to the negative sampling point of the battery module. When connecting the battery module and the battery controller, first, one end of each connection component is electrically connected to each voltage sampling point, and the other end is electrically connected to each pin of the battery controller. Finally, the first mechanical switch is closed to conduct the voltage acquisition circuit inside the battery controller. Compared with the prior art, before closing the first mechanical switch, the voltage acquisition circuit is open, avoiding the breakdown of the diode due to the instantaneous current generated by unstable operation when the battery controller is connected to each voltage sampling point. It can prevent the generation of instantaneous current when plugging and unplugging the battery controller to protect the front-end analog chip in the voltage acquisition circuit. Description of the Drawings

[0021] Figure 1 Schematic diagram showing a connector provided by an embodiment of the present utility model;

[0022] Figure 2 Schematic diagram showing a connector provided by another embodiment of the present utility model;

[0023] Figure 3 Schematic diagram showing a connector provided by another embodiment of the present utility model;

[0024] Figure 4 Structural view showing the main housing and the first plug provided by an embodiment of the present utility model;

[0025] Figure 5 Structural view showing the main housing and the first plug provided by another embodiment of the present utility model;

[0026] Figure 6 Structural view showing the main housing and the second plug provided by an embodiment of the present utility model;

[0027] Figure 7 Structural view showing the main housing, the first plug and the second socket provided by an embodiment of the present utility model.

[0028] Reference Signs:

[0029] 1. Connector, 2. Battery controller, 3. Battery module, 4. Voltage sampling point, 5. Connection component, 6. Pin, 7. Negative sampling point, 8. Positive sampling point, 9. First mechanical switch, 10. Second mechanical switch, 11. Voltage sampling line, 12. Conductor, 13. Negative sampling line, 14. Positive sampling line, 15. Main housing, 16. First socket, 17. First plug, 18. Second plug, 19.

[0030] Third plug, 20. Second socket. Detailed Embodiment

[0031] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. Although the description of the present utility model will be introduced in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this implementation manner. On the contrary, the purpose of introducing the utility model in conjunction with the implementation manner is to cover other alternatives or modifications that may be extended based on the claims of the present utility model. In order to provide a deep understanding of the present utility model, many specific details will be included in the following description. The present utility model can also be implemented without using these details. In addition, in order to avoid confusing or obscuring the key points of the present utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0032] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0033] In the description of this embodiment, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0034] The terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0035] In the description of this embodiment, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "connected", "connected to" 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 or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific situations.

[0036] To make the purpose, technical solutions and advantages of the present utility model clearer, the implementation manners of the present utility model will be further described in detail below with reference to the drawings.

[0037] The implementation manner of the present utility model provides a connector for electrically connecting a battery controller 2 to the voltage sampling points 4 of each battery cell in a battery module 3, asFigure 1 and Figure 2 As shown in Figure 2 , the connector 1 includes a plurality of connection components 5 and a first mechanical switch 9. One end of each connection component 5 is electrically connected to the voltage sampling point 4 of each battery cell in a one-to-one correspondence, and the other end is electrically connected to each pin 6 of the battery controller 2 in a one-to-one correspondence. The voltage sampling point 4 includes a negative sampling point 7 and a plurality of positive sampling points 8, and the first mechanical switch 9 is connected in series to the connection component 5 connected to the negative sampling point 7.

[0038] With the above technical solution, the first mechanical switch 9 is connected in series to the connection component 5 electrically connected to the negative sampling point 7 of the battery module 3. When connecting the battery module 3 and the battery controller 2, first, one end of each connection component 5 is electrically connected to each voltage sampling point 4, and the other end is electrically connected to each pin 6 of the battery controller 2. Finally, the first mechanical switch 9 is closed to turn on the voltage acquisition circuit inside the battery controller 2. Compared with the prior art, before closing the first mechanical switch 9, the voltage acquisition circuit is open, avoiding the breakdown of the diode due to the instantaneous current generated by unstable operation when the battery controller 2 is connected to each voltage sampling point 4. It can prevent the generation of instantaneous current when unplugging and plugging the battery controller 2 to protect the front-end analog chip in the voltage acquisition circuit.

[0039] Further, as Figure 3 shown in Figure 3 , a second mechanical switch 10 (shown as K2 in Figure 3 ) is connected in series to each connection component 5 connected to each positive sampling point 8. When connecting the battery module 3 and the battery controller 2, first, one end of each connection component 5 is electrically connected to each voltage sampling point 4, and the other end is electrically connected to each pin 6 of the battery controller 2. Subsequently, each of the second mechanical switches 10 is closed in sequence, and finally, the first mechanical switch 9 is closed to turn on the voltage acquisition circuit inside the battery controller 2. In some cases, the operator may wrongly connect the connection component 5 where the first mechanical switch 9 is located to the positive sampling point 8, and the negative sampling point 7 is inevitably electrically connected to other connection components 5. At this time, it is inevitable that the positive and negative poles are connected simultaneously, which may generate an instantaneous current to breakdown the front-end analog chip. In this embodiment, by setting the second mechanical switch 10 and closing the second mechanical switch 10 in sequence before closing the first mechanical switch 9, it can completely avoid the simultaneous connection of the positive sampling point 8 and the negative sampling point 7 to generate an instantaneous large current, and better protect the front-end analog chip.

[0040] Further, as Figures 1 to 3 shown in Figures 1 to 3 , the connection component 5 includes a voltage sampling wire 11 and a conductor 12, where:

[0041] The voltage sampling wire 11 includes a negative sampling wire 13 and a plurality of positive sampling wires 14. The negative sampling wire 13 is electrically connected to the negative sampling point 7, and each positive sampling wire 14 is electrically connected to each positive sampling point 8 in a one-to-one correspondence;

[0042] Each conductor 12 is respectively used to electrically connect each voltage sampling line 11 to each pin 6 of the battery controller 2 in a one-to-one correspondence.

[0043] Furthermore, as Figures 4 to 7 shown, the connector 1 further includes a main housing 15. The conductors 12 are disposed in the main housing 15 in isolation. One end of the main housing 15 is provided with a first socket housing 16. The ends of the conductors 12 located in the first socket housing 16 are all provided with pins.

[0044] Furthermore, as Figure 4 and Figure 5 shown, the main housing 15 is disposed on the battery controller 2. Each pin 6 is electrically connected to each conductor 12 respectively. The first socket housing 16 is disposed at one end of the main housing 15 away from the battery controller 2. The connector 1 further includes a first plug 17. A plurality of first jacks for conducting electricity are provided in the first plug 17. The output ends of the voltage sampling lines 11 are electrically connected to the first jacks in a one-to-one correspondence. When the first plug 17 is plugged into the first socket housing 16, the pins can be inserted into the first jacks and electrically connected to the conductors 12. In some embodiments, the first mechanical switch 9 is disposed on the negative sampling line 13. In other embodiments, the first mechanical switch 9 is connected in series to the conductor 12 connected to the negative sampling line 13, and the operating end of the first mechanical switch 9 protrudes outside the main housing 15.

[0045] Furthermore, as Figure 6 shown, the main housing 15 is disposed on the battery module 3. Each voltage sampling line 11 is electrically connected to each conductor 12 respectively. The first socket housing 16 is disposed at one end of the main housing 15 away from the battery module 3. The connector 1 further includes a second plug 18. A plurality of second jacks for conducting electricity are provided in the second plug 18. The second jacks are electrically connected to the pins in a one-to-one correspondence. When the second plug 18 is plugged into the first socket housing 16, the pins can be inserted into the second jacks and electrically connected to the conductors 12. In this embodiment, the first mechanical switch 9 is connected in series to the conductor 12 connected to the negative sampling line 13, and the operating end of the first mechanical switch 9 protrudes outside the main housing 15.

[0046] Furthermore, as Figure 7As shown, a third plug 19 is further provided at the other end of the main housing 15; a first plug 17 is provided on the battery module 3. When the first plug 17 is inserted into the first socket 16, each voltage sampling wire 11 is electrically connected to each conductor 12 in one-to-one correspondence; a second socket 20 is provided on the battery controller 2. When the third plug 19 is inserted into the second socket 20, each pin 6 is electrically connected to each conductor 12 in one-to-one correspondence. In this embodiment, the first mechanical switch 9 is connected in series to the conductor 12 connected to the negative sampling wire 13, and the operating end of the first mechanical switch 9 protrudes outside the main housing 15. In some embodiments, there is no parasitic diode in the front-end analog chip of the battery controller 2, so there is no need to worry about the diode being broken down by the instantaneous current. At this time, the first mechanical switch 9 does not need to be added, the main housing 15 can be removed, and the first plug 17 can be directly inserted into the second socket 20. This not only saves materials but also reduces the operation steps. In other embodiments, the existing battery module 3 is already provided with the first plug 17, and the existing battery controller 2 is already provided with the second socket 20. It is not convenient to add the first mechanical switch 9 to the first plug 17 or the second socket 20. The operator can insert the main housing 15 between the first plug 17 and the second socket 20 to make the first mechanical switch 9 exist between the battery controller 2 and the battery module 3, so as to prevent the generation of instantaneous current when the battery controller 2 is plugged and unplugged, and protect the front-end analog chip in the voltage acquisition circuit.

[0047] An embodiment of the present invention further provides a battery pack, which includes any one of the connectors 1 as described above.

[0048] Although the present invention has been illustrated and described by referring to some preferred embodiments of the present invention, those of ordinary skill in the art should understand that the above content is a further detailed description of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. Those skilled in the art can make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A connector for electrically connecting a battery controller to a voltage sampling point of each battery cell in a battery module, characterized in that: The connector comprises: A plurality of connection components, one end of each of the connection components is electrically connected to a voltage sampling point of each of the battery cells in a one-to-one correspondence, and the other end of each of the connection components is electrically connected to each pin of the battery controller in a one-to-one correspondence; The voltage sampling points include a negative sampling point and a plurality of positive sampling points, and a first mechanical switch is connected in series to the connection component connected to the negative sampling point.

2. The connector according to claim 1, wherein: A second mechanical switch is connected in series to each of the connection components connected to each of the positive electrode sampling points.

3. The connector according to claim 1 or 2, characterized in that: The connection assembly includes a voltage sampling line and a conductor, wherein: The voltage sampling lines include a negative sampling line and a plurality of positive sampling lines, wherein the negative sampling line is electrically connected to the negative sampling point, and each of the positive sampling lines is electrically connected to each of the positive sampling points in a one-to-one correspondence; Each of the conductors is used to electrically connect each of the voltage sampling lines to each of the pins of the battery controller in a one-to-one correspondence.

4. The connector according to claim 3, characterized in that The connector further comprises a main housing, each of the conductors is isolatedly arranged in the main housing, a first plug shell is arranged at one end of the main housing, and a pin is arranged at the end of each of the conductors located in the first plug shell.

5. The connector according to claim 4, characterized in that: The main shell is arranged on the battery controller, and each of the pins is electrically connected to each of the conductors respectively; the first plug shell is arranged at an end of the main shell away from the battery controller; the connector also includes a first plug, and the first plug is provided with a plurality of first sockets for conduction, and each of the first sockets is electrically connected to the output end of each of the voltage sampling lines one by one; when the first plug is plugged into the first plug shell, each of the pins can be inserted into each of the first sockets and electrically connected to the conductor.

6. The connector according to claim 4, characterized in that: The main shell is arranged on the battery module, and each of the voltage sampling lines is electrically connected to each of the conductors respectively; the first plug shell is arranged at one end of the main shell away from the battery module; the connector also includes a second plug, and the second plug is provided with a plurality of second sockets for conduction, and each of the second sockets is electrically connected to each of the pins one by one; when the second plug is plugged into the first plug shell, each of the pins can be inserted into each of the second sockets and electrically connected to the conductor.

7. The connector as claimed in claim 4, characterized in that A third plug is also provided at the other end of the main shell; a first plug is provided on the battery module, and when the first plug is plugged into the first plug shell, each of the voltage sampling lines is electrically connected to each of the conductors in a one-to-one correspondence; a second plug shell is provided on the battery controller, and when the third plug is plugged into the second plug shell, each of the pins is electrically connected to each of the conductors in a one-to-one correspondence.

8. The connector according to claim 5, characterized in that: The first mechanical switch is connected in series to the negative electrode sampling line.

9. The connector according to any one of claims 5 to 7, characterized in that: The first mechanical switch is connected in series to a conductor connected to the negative electrode sampling line, and an operating end of the first mechanical switch protrudes out of the main housing.

10. A battery pack, characterized in that: Comprising the connector according to any one of claims 1 to 9.

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