Self-heating battery cell with integrated switch

Abstract

The utility model provides a self-heating battery cell with an integrated switch, which comprises a pole piece, a first pole column and a heating piece, the first pole column is electrically connected with the pole piece, and the heating piece can heat the positive pole piece and the negative pole piece; the heating pole is electrically connected with the heating sheet; the integrated switch can control disconnection and connection of the heating pole and the first pole; the integrated switch comprises an MOS tube and a plug connector, the plug connector can be connected with an external signal transmission component and transmit external signals to the MOS tube, and the MOS tube can control disconnection and connection of the heating pole and the first pole according to the received external signals. And the integrated switch adopted by the battery cell is low in cost, small in size, high in space utilization rate and good in grouping performance.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, in particular to a self-heating battery core with an integrated switch. Background Art

[0002] Due to the temperature sensitivity of lithium battery material systems, thermal management of power and energy storage systems has always been a difficult problem in the industry. Too high or too low system temperature is not conducive to the performance of its electrical performance. Especially in ultra-low temperature environments, it seriously affects battery performance. Therefore, all-climate (ACB) batteries are currently proposed on the market to quickly increase their temperature by automatically heating the battery inside to ensure the stability of their charging and discharging performance. However, from a structural design perspective, how to control the opening and closing of the automatic heating of the ACB battery cell and ensure the stability of the control switch during the automatic heating of the battery have become issues that need to be urgently addressed. Utility Model Content

[0003] In order to provide a battery cell that can stably control the on and off functions of the heating function of the heating plate in the battery cell, the utility model provides a self-heating battery cell with an integrated switch, including: a pole piece and a first pole, the first pole and the pole piece are electrically connected, a heating plate, which can heat the positive pole piece and the negative pole piece; a heating pole, which is electrically connected to the heating plate; an integrated switch, which can control the disconnection and connection of the heating pole with the first pole; the integrated switch includes a MOS tube and a connector, the connector can be connected to an external signal transmission component and transmit the external signal to the MOS tube, and the MOS tube can control the disconnection and connection of the heating pole with the first pole according to the received external signal.

[0004] Furthermore, the integrated switch also includes a connecting portion, and the connecting portion can be connected to the first pole and the heating pole respectively.

[0005] Furthermore, the connecting portion is a copper clad area.

[0006] Furthermore, the copper clad area includes a first copper clad area and a second copper clad area, and the first copper clad area and the second copper clad area are separately arranged.

[0007] Furthermore, the first copper-clad area is connected to the first pole by welding, and the second copper-clad area is connected to the heating pole by welding.

[0008] Furthermore, a resistor is provided on the integrated switch.

[0009] Furthermore, a capacitor is also provided on the integrated switch.

[0010] Furthermore, the resistor, the capacitor, the MOS tube and the connector are integrated on a printed circuit board.

[0011] Furthermore, the first pole is configured as a positive pole or a negative pole.

[0012] Furthermore, the heating plate is configured as a nickel plate.

[0013] The integrated switch of the battery cell of the utility model is connected to the positive pole and the heating pole by welding, and the production process is simple, the structure is stable, and it is safe and reliable; and the integrated switch is provided with a connector, which can be easily connected to an external signal transmission component. When the battery cell of the utility model needs to form a battery module or a battery pack, it can be very conveniently connected to the connecting member in the battery module, and the battery grouping is very simple, which can simplify the battery cell grouping process. Therefore, the battery cell of the utility model has low cost, small size, high space utilization, and good grouping performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the battery cell of the utility model;

[0015] Figure 2 It is a schematic diagram of the battery cell of the utility model with the outer shell removed;

[0016] Figure 3 It is a schematic diagram of the integrated switch of the battery cell of the utility model;

[0017] Figure 4 A schematic diagram of the integrated switch of the battery cell of the utility model from another angle;

[0018] Figure 5 This is a circuit diagram of an integrated switch of the battery cell of the utility model;

[0019] Figure 6 This is a control schematic diagram of the integrated switch of the battery cell of the utility model. Implementation

[0020] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0021] like Figure 1-2As shown, the battery cell 20 of the present invention includes a battery cell pole sheet winding body 208 (the pole sheet winding body includes a positive pole sheet and a negative pole sheet), a positive pole column 201 connected to the positive pole sheet, a negative pole column 202 connected to the negative pole sheet, a top cover 206 and a shell 209. The battery cell pole sheet winding body 208 is contained in the shell 209, the positive pole column 201 and the negative pole column 202 are arranged on the top cover 206, and the top cover 206 is arranged above the shell 209 to seal the opening of the shell 205. The battery cell 20 of the present invention also includes a heating plate 205, which is placed inside the shell 209 together with the battery cell pole sheet winding body 208, and the heating plate 205 leads to a heating pole 203 at the position of the battery top cover 206. The heating plate 205 is preferably constructed of metal foil or sheet, such as nickel foil or nickel sheet. Of course, the heating plate 205 can also be constructed of other materials as long as it can quickly supply heat to the battery pole after power is turned on. The heating plate 205 located inside the shell is provided with an extraction pole (not shown) and an output pole (not shown). The extraction pole of the heating plate 205 is welded to the negative pole inside the battery cell, and the output pole of the heating plate 205 is connected to the heating pole 203 of the top cover. The battery 20 of the utility model is also provided with an integrated switch 10, such as Figure 3-5As shown, the integrated switch 10 is provided with a MOS tube 103, a connector 101, a first resistor 106, a second resistor 107, and a capacitor 108. The components of the integrated switch 10 are connected together in the form of an integrated circuit board. A first copper clad area 104 and a second copper clad area 105 are provided at the bottom of the integrated switch 10; the first copper clad area 104 and the second copper clad area 105 are arranged at intervals, the first copper clad area 104 is configured to be connected to the positive electrode column 201, and the second copper clad area 105 is configured to be connected to the heating electrode 203. Preferably, the first copper clad area 104 is connected to the positive electrode column 201 by welding, and the second copper clad area 105 is also connected to the negative electrode column 202 by welding. In this embodiment, the connection area between the positive electrode column 201 and the first copper clad area 104 is large, and the connection is stable, so that the integrated switch 10 forms a reliable electrical connection with the positive electrode column 201; of course, it can also be connected in other ways as long as it can form a reliable electrical connection with the positive electrode column 201. The connector 101 is provided with a first pin 1011 and a second pin 1012 respectively connected to the MOS tube 103; the connector 101 is also provided with a receiving port 1013, which can be connected to an external signal transmission component to receive a transmission signal from an external signal, such as receiving information about the temperature of the battery cell transmitted from the outside. The MOS tube 103 and the first copper-clad area 104 and the second copper-clad area 105 of the integrated switch 10 are also connected together by welding. At the same time, in order to ensure the stability of the signal transmission between the MOS tube 103 and the connector 101, a first resistor 106, a second resistor 107 and a capacitor 108 are provided between the connector 101 and the MOS tube. Specifically, the first resistor R1 is connected in series between the connector 101 and the MOS tube 103, and the second resistor 102 and the capacitor 108 are connected in parallel between the connector 101 and the MOS tube 103. The tube 103 and the connector 101 are provided with resistors and capacitors to improve the response speed of the circuit and reduce the delay time, so that the integrated switch 10 can more accurately control the disconnection and connection between the positive pole 201 and the heating pole 203. At the same time, the integrated switch 10 integrates various components such as resistors, capacitors, MOS tubes, etc. into an integrated circuit board, which can reduce the production cost of the integrated switch, and the components are easy to assemble. At the same time, the integrated switch is connected to the positive pole and the heating pole by welding, and the production process is simple, the structure is stable, and it is safe and reliable. In addition, a connector is provided on the integrated switch, which can be easily connected to an external signal transmission component. When the battery cell of the utility model needs to form a battery module or a battery pack, it can be very conveniently connected to the connecting component in the battery module. The battery grouping is very simple, and the process of battery cell grouping can be simplified. Although the integrated switch in this embodiment is arranged between the positive pole 201 and the heating pole 203, the integrated switch can also be arranged between the negative pole 202 and the heating pole.

[0022] The working process of the battery cell of the present invention is briefly introduced as follows: the connector 101 of the battery cell of the present invention can be connected to the signal collector outside the chip. When the external signal collector detects that the temperature of the battery cell is too low and needs to be heated, the connector 101 transmits the externally transmitted signal of opening the switch to the MOS tube 103. The MOS tube 103 is turned on, and the positive pole 201 and the heating pole 203 of the battery cell are turned on, and the heating plate 205 inside the battery cell starts to generate heat and heats the pole piece inside the battery cell; when the battery cell temperature detected by the signal collector outside the battery cell has reached the optimal temperature, the connector 101 transmits the external signal to the MOS tube 103, the MOS tube is disconnected, the positive pole 201 and the heating pole 203 of the battery cell are disconnected, and the heating plate 205 stops heating.

[0023] The utility model is provided with an integrated switch 10 on the battery cell 20, which can realize real-time control of the battery cell temperature. When the temperature of the battery cell 20 is too low, the battery cell turns on the MOS tube in the integrated switch to start automatic heating. When the temperature of the battery cell 20 rises to a certain value and stabilizes, the MOS tube in the integrated switch is disconnected to turn off the automatic heating, thereby realizing that the battery module can control the battery heating to heat up quickly and stably in an ultra-low temperature environment through the integrated switch, and its charging and discharging performance can be normally exerted without serious performance degradation. Moreover, the integrated switch used in the utility model battery cell is low in cost, small in size, high in space utilization, and good in grouping performance.

[0024] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A self-heating battery cell with an integrated switch, comprising: A pole piece and a first pole, wherein the first pole and the pole piece are electrically connected, A heating plate, capable of heating the pole piece; A heating pole electrically connected to the heating plate; An integrated switch can control the disconnection and connection of the heating pole with the first pole; characterized in that the integrated switch includes a MOS tube and a connector, the connector can be connected to an external signal transmission component and transmit the external signal to the MOS tube, and the MOS tube can control the disconnection and connection of the heating pole with the first pole according to the received external signal.

2. The self-heating battery cell with integrated switch according to claim 1, characterized in that: The integrated switch further includes a connecting portion, and the connecting portion can be connected to the first pole and the heating pole respectively.

3. The self-heating battery cell with integrated switch according to claim 2, characterized in that: The connecting portion is a copper-clad area.

4. The self-heating battery cell with integrated switch according to claim 3, characterized in that: The copper-clad area includes a first copper-clad area and a second copper-clad area, and the first copper-clad area and the second copper-clad area are separately arranged.

5. The self-heating battery cell with integrated switch according to claim 4, characterized in that: The first copper-clad area is connected to the first pole by welding, and the second copper-clad area is connected to the heating pole by welding.

6. The self-heating battery cell with integrated switch according to claim 5, characterized in that: The integrated switch is also provided with a resistor.

7. The self-heating battery cell with integrated switch according to claim 6, characterized in that: The integrated switch is also provided with a capacitor.

8. The self-heating battery cell with integrated switch according to claim 7, characterized in that: The resistor, the capacitor, the MOS tube and the connector are integrated on a printed circuit board.

9. The self-heating battery cell with integrated switch according to claim 8, characterized in that: The first pole is configured as a positive pole or a negative pole.

10. The self-heating battery cell with integrated switch according to claim 9, characterized in that: The heating plate is configured as a nickel plate.

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