TW201230607A - Battery heating circuit - Google Patents

Abstract

A battery heating circuit provided in the invention comprises: a switchgear, a switch control module, a first damping element, an energy storage circuit and an energy transferring unit. The energy storage circuit for connecting with the battery comprises a current storage element and a first charge storage element. The fist damping element, the switchgear, and the energy storage circuit are connected in series. The switch control module is connected with the switchgear for controlling the switchgear to switch on and off so as to control energy to flow between the battery and the energy storage circuit. The energy transferring unit is connected with the energy storage circuit for transferring energy in the energy storage circuit to an energy storage element after the switchgear is first switched on and then switched off. The heating circuit provided in the invention can improve charge-discharge performance of the battery, improve security when heating the battery and recycle energy.

Description

201230607 VI. Description of the Invention: [Technical Field] [0001] The present invention relates to the field of electronic device technology, and more particularly to a heating circuit for a battery. [Prior Art] [0002] Considering that a car needs to travel under complicated road conditions and environmental conditions, or some electronic devices need to be used in poor environmental conditions, a battery that is a power source for an electric vehicle or an electronic device needs to be adapted. These complicated situations. In addition to the need to consider these conditions, you also need to consider the battery life and battery charge and discharge loop performance, especially when the electric vehicle or electronic equipment is in a low temperature environment, it is more desirable that the battery has excellent low temperature charge and discharge performance and higher Input and output power performance. In general, if the battery is charged under low temperature conditions, the impedance of the battery will increase and the polarization will increase, resulting in a decrease in the capacity of the battery, which ultimately leads to a decrease in battery life. SUMMARY OF THE INVENTION [0003] The object of the present invention is to provide a heating circuit for a battery in which the battery causes an increase in resistance of the battery under low temperature conditions and polarization is increased, thereby causing a decrease in capacity of the battery. In order to maintain the capacity of the battery under low temperature conditions and to improve the charge and discharge performance of the battery, the present invention provides a heating circuit for a battery. A heating circuit for a battery provided by the present invention, the heating circuit comprising a switching device, a switch control module, a damping element, a storage circuit and an energy transfer unit, wherein the energy storage circuit is configured to be connected to the battery, the energy storage circuit Including a current memory element and a charge memory element, the damping element and the 10014313# single number A 〇 101 page 4 / a total of 35 pages 1013091665-0 201230607 switching device in series with the energy storage circuit, the switch control module and switch a device connection for controlling switching device to be turned on and off to control energy flow between the battery and the storage circuit, the energy transfer unit being coupled to the energy storage circuit for switching After the break, the energy in the tank circuit is transferred to the energy storage element. The heating circuit provided by the invention can improve the charge and discharge performance of the battery, and in the Shai heating circuit, when the energy storage circuit is connected in series with the battery, when the battery is heated, the switch device can be prevented from being short-circuited due to the existence of the series of charge memory elements. (4) Safety _ questions, can protect the battery financially. At the same time, the present invention also provides an energy transfer unit. When the switch device is turned off, the energy transfer unit can transfer the energy in the energy storage circuit to other miscellaneous components or money to supply it, thus also playing a role. The role of energy recycling. Other features and advantages of the invention will be described in detail in the detailed description which follows. L through the way] [0004] 〇,. The drawings illustrate in detail the specific embodiments of the invention. It should be understood that the presently described embodiments are merely illustrative of the invention and are not intended to be used in the invention. 'There is 'unless specifically stated', when mentioned in the following, the term switch control module, the rabbit can be arbitrarily controlled according to the set conditions or settings: corresponding control commands (such as the control of the pulse with the corresponding duty cycle ^) The switching device connected thereto is turned on or off correspondingly to the female Φ drawing; β * can be, for example, a PLC (programmable controller); when the following gangsters are in time, the bamboo shoots "" the on-off control or the root. Signal realization 1〇〇14313 Production order number A0101 According to the characteristics of several devices, the on-off control is turned on.

Page / Total 35 pages 1013091665-G 201230607 Off 'can be a one-way switch' such as a one-way switch composed of a bidirectional switch and a diode in series, or a bidirectional switch, such as a metal oxide semiconductor field The effect transistor (Metal Oxide oemiconductor MOSFET) or an IGBT (Insulated Gate Bipolar Transistor) with an anti-free current diode, etc., when referred to below, the term "bidirectional switch" refers to A bi-directional switch that achieves on-off control by means of an electrical signal or an on-off control according to the characteristics of the component itself, such as an M〇SFET or an IGBT with an anti-freewheeling diode; etc.; The semiconductor element refers to a semiconductor element having a unidirectional conduction function, such as a diode or the like; when referred to hereinafter, the term "charge memory element" refers to any device that can realize charge storage, such as a capacitor, etc.; when mentioned below , the term "current memory element" means (d) a device that can store current, such as an inductor, etc.; when mentioned below, The term "forward" refers to the direction in which the battery can flow from the battery to the tank circuit. The term "reverse" refers to the direction in which energy flows from the residual circuit to the battery; when referred to below, the term "battery" includes - secondary battery (eg dry battery, calibrated battery, etc.) / secondary battery (eg _ sub-cell, _ battery, nickel-hydrogen battery or acid-acid battery, etc.); when referred to below, the term "damping element" refers to any passing current The means for flowing the obstruction to achieve energy consumption can be, for example, a resistor or the like; when referred to hereinafter, the term (10) constitutes a loop. The switching device and the energy storage circuit are connected in series (4). In view of the different characteristics of different types of batteries, in the present invention, "(4), 7, "t 4 pools are not 10014313, early numbering is 6th/total 35 The page calendar W can be an ideal battery that does not include the internal parasitic brother page/community 苜1013091665-0 201230607 resistance and parasitic inductance, or the internal parasitic resistance and the parasitic inductance. Battery pack with parasitic resistance and parasitic inductance. Therefore, those skilled in the art should understand that when the "battery" is an ideal battery that does not contain internal parasitic resistance and parasitic inductance, or the resistance value of the internal parasitic resistance and the inductance value of the parasitic inductance is small, the first damping element R1 Refers to the external damper element of the battery. The current memory element L1 refers to the current memory element external to the battery. When the "battery" is a battery pack containing internal parasitic resistance and parasitic inductance, the first damper element R1 can be referred to as a battery. The external damping element, also 0, can refer to the parasitic resistance inside the battery pack. Similarly, the current memory element L1 can be either a current memory element outside the battery or a parasitic inductance inside the battery pack. In the embodiment of the present invention, in order to ensure the service life of the battery, the battery needs to be heated at a low temperature. When the heating condition is reached, the heating circuit is controlled to start working, and the battery is heated, and when the heating condition is stopped, the control is performed. The heating circuit stops working. .... In the actual application of the battery, as the environment changes, the battery heating conditions and the stop heating conditions can be set according to the actual environmental conditions, in order to more accurately control the temperature of the battery, thereby ensuring the battery Charge and discharge performance. In order to heat the battery E in a low temperature environment, the present invention provides a heating circuit for the battery E. As shown in FIG. 1, the heating circuit includes a switching device 1, a switch control module 100, and a first damping element R1. The energy storage circuit and the energy transfer unit are connected to the battery E. In one embodiment of the invention, the tank circuit comprises a current memory element L1 and a first charge memory element C1, a first damping element R1 and a switching device 1 10014313^^^ A〇101 ^ 7 1 7 ^ 35 1 1013091665 -0 201230607 is connected in series with the energy storage circuit, and the switch control module 100 is connected to the switching device 1 for controlling the switching device 1 to be turned on and off to control the flow of energy between the battery and the energy storage circuit. The transfer unit is connected to the energy storage circuit for transferring energy in the energy storage circuit to the energy storage element after the switching device 1 is turned on and off. According to the technical solution of the present invention, when the heating condition is reached, the switch control module 100 controls the switching device 1 to be turned on, the battery E and the energy storage circuit are connected in series to form a loop, and the battery E can be discharged through the loop, that is, the first charge storage element C1 is performed. Charging, when the current in the loop passes through the current peak and the positive direction is zero, the first charge memory element C1 starts to discharge through the loop, that is, the battery E is charged; during the charging and discharging of the battery E, the current in the loop is positive The reverse direction can flow through the first damper element R1, and the heat of the first damper element R1 can be used to heat the battery E. By controlling the on and off times of the switch device 1, the battery E can be controlled only by discharging. Heating, or heating by both discharging and charging. When the stop heating condition is reached, the switch control module 100 can control the switch device 1 to be turned off, and the heating circuit stops operating. The energy transfer unit is connected to the energy storage circuit for transferring the energy in the energy storage circuit to the energy storage element after the switching device 1 is turned on and off, in order to recycle the energy in the storage circuit. The energy storage component can be an external capacitor, a low temperature battery or a power grid, and other electrical equipment. Preferably, the energy storage component is the battery E provided by the present invention, and the energy transfer unit includes a power recharging unit 103, and the power recharging unit 103 is connected to the energy storage circuit for after the switching device 1 is turned on and off again. The energy in the tank circuit is transferred to battery E as shown in Figure 2. According to the technical solution of the present invention, after the switching device 1 is turned off, the transfer unit transfers the energy in the energy storage circuit to the battery E through the energy 10014313^^A〇101 page 8/35 pages 1013091665-0 201230607 After the switching device 1 is turned on again, the transferred energy is recycled, which improves the working efficiency of the heating circuit. As an embodiment of the power refill unit 丨03, as shown in FIG. 3, the power refill unit 103 includes a second DC-DC module 3, the second DC-DC module 3 and the first charge storage element C1. Connected to the battery E, the switch control module 100 is further connected to the second]) C_DC module 3 for transferring the energy in the first charge memory element C1 to the battery by controlling the operation of the second DC-DC module 3. E. The second DC-DC module 3 is a DC-DC converter circuit commonly used in the art for implementing energy transfer. The present invention does not impose any limitation on the specific circuit structure of the second DC-DC module 3, as long as the first charge can be realized. The energy of the memory element C1 can be transferred, and those skilled in the art can add, replace or delete the components of the circuit towel according to the actual operation.

Switch S4 is a MOSFET.

The docking point with the group is respectively connected with the third page 9/35 pages 10014313# single number A0101: the positive end of the pool E, the other two one-way half contacts are connected with the negative end of the battery E, and the group The 3rd and 4th legs of the T3 are connected to 1013091665-0 201230607, thereby forming a bridge rectifier circuit. The source of the bidirectional switch S1 is connected to the drain of the bidirectional switch S3, the source of the bidirectional switch S2 is connected to the drain of the bidirectional switch S4, the drain of the bidirectional switch S1, the bidirectional switch S2 and the first charge storage element C1. The positive terminal is connected, and the source of the bidirectional switch S3 and the bidirectional switch S4 is connected to the negative terminal of the first charge storage element C1, thereby constituting a full bridge circuit. In the full bridge circuit, the bidirectional switch S1, the bidirectional switch S2 is the upper bridge arm, the bidirectional switch S3, the bidirectional switch S4 is the lower bridge arm, the node between the 1st pin of the third transformer T3 and the bidirectional switch S1 and the bidirectional switch S3 The connection between the 2 pin and the bidirectional switch S 2 and the bidirectional switch S 4 is connected. The bidirectional switch S1, the bidirectional switch S2, the bidirectional switch S3 and the bidirectional switch S4 are respectively turned on and off by the control of the switch control module 100. The working process of the second DC-DC module 3 is described below: 1. After the switching device 1 is turned off, the switch control module 100 controls the bidirectional switch S1 and the bidirectional switch S4 to be simultaneously turned on to form the A phase, and the bidirectional switch S2 and the bidirectional switch S3 are simultaneously turned on to form the B phase, and the phase A is controlled. The B phase alternately conducts to form a full bridge circuit for operation; 2. When the full bridge circuit operates, the energy on the first charge storage element C1 is transferred to the battery E through the third transformer T3 and the rectifier circuit, and the rectifier circuit inputs the alternating current Converted to direct current output to battery E, to achieve the purpose of power recharge. In order to prevent the first charge storage element C1 from charging the battery E in a low temperature condition and ensuring the charge and discharge performance of the battery E, as a preferred embodiment of the heating circuit provided by the present invention, the switch control module 100 is used to control the switch device 1 Turning on and off to control energy flow only from battery E to energy storage 10014313# single number leg 01 $ 10 pages / total 35 pages 1013091665-0 201230607 way, thereby avoiding the first charge memory element to perform on battery E Charging 0 For the embodiment in which energy flows only from the battery E to the energy storage circuit, the switch control unit 100 is used to control the switching device 1 to be turned off before the current flowing through the switching device 为零 after the switching device 1 is turned on is zero or zero. As long as the current is guaranteed to flow only from the battery E to the first charge storage element. In order to control the flow of energy only from the battery E to the first charge storage element, according to an embodiment of the present invention, as shown in FIG. 5, the switching device i includes a first switch K1 and a first unidirectional semiconductor element j), A switch 丨 and the first unidirectional semiconductor component D1 are connected in series to each other and then connected in series in the tank circuit, and the switch control module 100 is connected to the first switch K1 for controlling the switch by controlling the on and off of the first switch K1. Device 1 is turned "on" and "off". By serially connecting the first-unidirectional semiconductor element, in the case of the __K1 failure, the energy in the first charge memory element can be prevented from flowing back, thereby avoiding charging of the battery pack. Since the current falling rate caused by the first switch Κ1 is turned off, a high overvoltage is induced on the current s1 element L1, which easily causes the first switch Κ1 to turn off because its current and voltage exceed the safe working area. However, it is preferable that the switch control module 1 is configured to control the first switch K1 to be turned off when the current flowing through the switching device 1 is zero. In order to improve the heating efficiency, preferably, according to another embodiment of the present invention, as shown in FIG. 6, the switch control module 100 is used to control the switch before the current flowing through the switch device 1 is turned on after the switch device 1 is turned on. The device 1 is turned off, and the switching device 1 includes a second unidirectional semiconductor component D9, a third unidirectional semiconductor component D10, a second switch K2, a second damper component R4w, and a second charge memory component C3, and a second unidirectional semiconductor component D9. And the second switch K2 10014313# single number Α 0101 page 11 / total 35 pages 1013091665-0 201230607 sequentially connected in series in the tank circuit, the second damping element R4 and the second charge memory element C3 are connected in series and then connected in parallel to the second switch K2 At both ends, the third unidirectional semiconductor component D10 is connected in parallel at both ends of the second damper component R4 for freewheeling the current memory component L1 when the second switch K2 is turned off, and the switch control module 100 and the second switch K2 The connection is for controlling the switching device 1 to be turned on and off by controlling the turning on and off of the second switch K2. The third unidirectional semiconductor element D10, the second damper element R4, and the second charge memory element C3 constitute an absorption loop for reducing the rate of current drop in the tank circuit when the second switch K2 is turned off. Thus, when the second switch K2 is turned off, the induced voltage generated on the current memory element L1 forces the third unidirectional semiconductor element D10 to be turned on and the freewheeling is performed by the second charge memory element C3, so that the current in the current memory element L1 The rate of change is reduced, limiting the induced voltage across the current memory element L1, which ensures that the voltage across the second switch K2 is within the safe operating area. When the second switch K2 is closed again, the energy stored on the second charge storage element C3 can be consumed by the second damping element R4. Further, in order to improve the operating efficiency of the heating circuit, it is possible to control the energy to reciprocate between the battery E and the storage circuit, and to perform heating by flowing the current forward and reverse through the first damper element R1. Therefore, as a preferred embodiment of the heating circuit provided by the present invention, the switch control module 100 is used to control the switching device 1 to be turned on and off, so that when the switching device 1 is turned on, energy is between the battery E and the storage circuit. Reciprocating flow. In order to achieve a reciprocating flow of energy between the battery E and the energy storage circuit, according to one embodiment of the invention, the switching device 1 is a first bidirectional switch K3, as shown in FIG. The switch control module 100 controls the first bidirectional switch K3 10014313 to produce a single number A 〇 101 page 12 / a total of 35 pages 1013091665-0 201230607 turn on and off, when the battery E needs to be heated, turn on the first - bidirectional switch K3 That is, the first bidirectional switch K3 can be turned off if the heating is suspended or when heating is not required. Separate system-single-bidirectional_3 real__b circuit is simple. The occupied system area is small and easy to implement, but in order to achieve the shutdown of the reverse current, the present invention also provides a preferred embodiment of the following switching device i. Preferably, the switching device 1 comprises a first one-way branch for realizing energy from the battery to the energy storage circuit and a second one-way branch for realizing energy flow from the energy storage circuit to the battery, the switch control module 100 Connected to either or both of the first one-way branch and the second one-way branch to control the turn-on and turn-off of the connected branch. When the battery needs to be heated, turning on both the first one-way branch and the second one-way branch, such as suspending heating, may choose to turn off one or both of the first one-way branch and the second one-way branch When both heating is not required, both the first one-way branch and the second one-way branch can be turned off. Preferably, both the first one-way branch road and the second one-way branch can be controlled by the switch control module 1〇〇, so that energy forward flow and reverse flow can be flexibly realized. As another embodiment of the switching device 1, as shown in FIG. 8, the switching device 1 may include a second bidirectional switch K4 and a third bidirectional switch K5, and the second bidirectional switch K4 and the third bidirectional switch K5 are connected in reverse series with each other. Forming a first one-way branch and a second one-way branch, the switch control module 100 is respectively connected to the second bidirectional switch K4 and the third bidirectional switch £5 for controlling the second bidirectional switch K 4 and the third bidirectional The turn-on and turn-off of the switch κ 5 controls the turn-on and turn-off of the first one-way branch and the second one-way branch. When it is necessary to heat the battery E, turn on the second bidirectional switch K4 and the third bidirectional 100143 singular bat number A_ page 13 / this acquaintance "1 1013091665-0 201230607 open secret, such as suspending heating can choose to turn off The two or both of the second bidirectional opening and the third bidirectional opening may turn off the second bidirectional switch K4 and the third bidirectional opening when heating is not required. The implementation of the switch skirt 1 can respectively control the conduction of the first one-way branch and the second one-way branch (four) and the reverse energy flow as another embodiment of the switching device 1, such as the ninth As shown in the figure, the switching device 1 includes a third open chest and a fourth unidirectional semiconductor element! And the fifth early direction to the semiconductor element D12, the third switch fourth unidirectional semiconductor element im connected in series to form a first one-way branch, the fifth one-way semiconductor several pieces D12 constitute a second one-way branch, the switch control mode The group (10) is connected to the third switch , for controlling the on and off of the first one-way branch by controlling the third off-on and off. In the switching device 1 as shown in Fig. 9, when the heating is required, the third opening can be turned on, and when the heating is not required, the third opening/closing 6 can be turned off. The implementation of the switching device 1 as shown in Fig. 9 realizes the energy reciprocating flow along the phase, but also realizes the shutdown function when the energy is reversely maneuvered. The present invention also proposes another implementation of the switching device ^, as shown in FIG. 10, the switching device 1 may further include a fourth switch 位于 in the second one-way branch, the fourth switch 7 and the fifth The one-way semiconductor component D12 is connected in series, and the switch control module 丨_ is connected to the fourth switch Κ7 for controlling the conduction and the off of the second one-way branch by controlling the on and off of the fourth switch Κ7. Thus, in the switching device 1 of the _(9), since the switches are present on both of the unidirectional branches (i.e., the third switch (four), the fourth switch Κ7)' has the shutdown function when the energy flows in the forward and reverse directions. Page 14 of 35 page 10014313#单号Α0101 1013091665-0 201230607 Preferably, the switching device 1 may further comprise a resistor in series with the first one-way branch and/or the second one-way branch for reducing the battery The current in the heating circuit avoids damage to the battery caused by excessive current in the circuit. For example, the switching device shown in Fig. 8! A resistor R6 in series with the second bidirectional switch and in series with the second bidirectional switch K5 is added to obtain another implementation of the switching device ’ as shown in Fig. 11. The switching device is also shown in Figure 12! An embodiment of the present invention is obtained by connecting a resistor R2 and a resistor R3 to each of the two unidirectional branches in the switching device shown in Fig. 1. For an embodiment in which energy flows back and forth between the battery E and the energy storage circuit, the switching device 1 can be turned off at any time point in one cycle or a plurality of cycles, and the turn-off time of the switching device 1 can be any time, such as a flow. The shutdown can be performed when the current of the switching device 1 is forward/reverse, and when the current is zero/non-zero. According to the required shutdown strategy, different implementations of the switching device 1 can be selected. If only the forward current flow is required to be turned off, the switching device i shown in, for example, FIG. 7 and FIG. 9 is selected. The realization form can be any. If it is necessary to turn off both the forward current and the reverse current, it is necessary to select the two-way branch controllable switching device as shown in Fig. 8 and Fig. 10. Preferably, the switch control module 100 is configured to control the switch device 1 to be turned off when the current flowing through the switch device 1 after the switch device 1 is turned on is zero or zero. More preferably, the switch control module 100 is configured to control the switch device i to be turned off when the current flowing through the switch device 1 is zero after the switch device 1 is turned on, and the zero-time turn-off has less influence on the entire circuit. 1013091665-0 As an embodiment of the present invention, the working efficiency of the heating circuit can be improved by transferring the direct energy in the first charge storage element C1 into the battery E, and a part of the energy in the first charge memory element C1 can also be used. 10014313#单号A〇101 Page 15 of 35 201230607 After consumption, the remaining energy in the first charge memory element ci is transferred, or after part of the energy transfer in the first charge memory element C1 Then, the remaining energy in the first charge storage element C1 is consumed. Therefore, as shown in FIG. 13, the heating circuit further includes an energy consuming unit connected to the first charge storage element C1, and the energy consuming unit is used before the energy transfer unit performs energy transfer after the switching device 1 is turned on and off again. The energy in the first charge storage element C1 is consumed, or after the energy transfer unit performs energy transfer, the energy in the first charge storage element C1 is consumed. The energy consuming unit can be combined with the above various embodiments including energy flowing only from the battery E to the energy storage circuit and energy reciprocating between the battery E and the energy storage circuit. The energy transfer unit of Fig. 13 is connected to the battery E for transferring energy back into the battery E, but as can be seen from the foregoing description, the energy transfer unit can also store energy into other energy storage elements. According to an embodiment of the present invention, as shown in FIG. 14, the energy consuming unit includes a voltage control unit 101 connected to the first charge storage element C1 for after the switching device 1 is turned on and off again, Before the energy transfer unit performs energy transfer, the voltage value across the first charge memory element C1 is converted into a voltage set value, or after the energy transfer unit performs energy transfer, the energy in the first charge memory element C1 is consumed. The order of energy consumption and energy transfer can be set according to the needs of actual operations, and is not limited in the present invention. The voltage setting value can also be set according to the actual operation. According to an embodiment, as shown in Fig. 14, the voltage control unit 101 includes a third damper element R5 and a fifth switch K8, a third damper element R5 and a 10014313^W A0101 page 16 of 35 pages 1013091665-0 201230607 The five switches K8 are connected in series with each other and then connected in parallel at the two ends of the _th charge memory element π, the switch control module 100 is also connected to the fifth switch K8, and the switch control module 1 〇〇 is also used to control the switch to be turned on and off. After the break control: the five switch K8 is turned on. Thereby, the energy of the 'first charge storage element (4) can be consumed by the third damper element R5. For a separate controller, it can be controlled by its internal switch control module 10 0

The setting of the program can realize the on/off control of different external switches. The switch control module 100 can also be a plurality of controllers, for example, a corresponding switch control module 1 〇〇 for each external switch, multiple switches The control module 100 can also be integrated into a body. The present invention does not limit the implementation form of the switch control module 100. The operation of the embodiment of the heating circuit for the battery will be briefly described below with reference to Figs. 15 to 18. It should be noted that although the features and elements of the present invention are described with reference to FIG. 15 to FIG. 18 in a specific combination, each feature or element may be used alone or without other features and elements. Or not in combination with other features and elements in various situations. The embodiment of the heating circuit of the battery E provided by the present invention is not limited to the embodiment shown in Figs. 15 to 18. In addition, the grid portion in the waveform diagram shown indicates that the drive pulse can be applied to the switch a plurality of times during the period of time, and the width of the pulse can be adjusted as needed, that is, 0. Heating of the battery cartridge as shown in FIG. In the circuit, the first switch 〇 and the first unidirectional semiconductor element D1 are used to form the switching device 1. The energy storage circuit includes a current memory element L1 and a first charge memory element C1, the first damper element R1 and the switching device 1 and the energy storage circuit In series, the second DC-DC module 3 constitutes the power recharging unit 103 in the energy transfer unit, and the switch control module 1〇〇10014313# single number A0101 page/total 35寅1013091665-0 201230607 can control the first switch The turn-on and turn-off of Κ1 and the operation of the second DC-DC module 3. Fig. 16 is a waveform timing chart corresponding to the heating circuit of Fig. 15, wherein 'vci refers to the voltage value of the first charge storage element C1, and I main refers to the current value of the current flowing through the first switch Κ1. The working process of the heating circuit is as follows: a) When the battery pack needs to be heated, the switch control module 1 〇〇 controls the first switch K1 to be turned on, and the battery E passes through the first switch K1, the first unidirectional semiconductor component D1 and the first A circuit composed of a charge memory element C1 is discharged, as in the time period tl shown in FIG. 6; the switch control module 1 控制 controls the first switch K1 to be turned off when the current flowing through the first switch 为零 is zero, The t2 time period as shown in Fig. 16; b) When the first switch K1 is turned off, the switch control module 1 〇〇 controls the second DC-DC module 3 to operate 'the first charge memory element (^ passes the first The second dc_dc module 3 converts the alternating current into a direct current output into the battery E, and after the power is recharged, the switch control module 1〇〇 controls the second DC_j) the C module 3 stops working, as shown in FIG. Time period; c) Repeat steps a) and b), the battery is continuously heated by discharge until the battery E reaches the stop heating condition. In the heating circuit of the battery ε as shown in Fig. 17, a third switch K6, a fourth unidirectional semiconductor element DU (first one-way branch) and a fourth switch K7, fifth connected in series with each other are used in series. The unidirectional semiconductor component D12 (the first one-way branch) constitutes the switching device 1. The energy storage circuit includes a current memory component L1 and a first charge memory component C1. The first damping component and the switching device 1 are connected in series with the energy storage circuit. The DC_DC module 3 constitutes a power recharging unit 1〇3 for transferring the energy in the first charge memory C1 back to the battery E, and the switch control module 1〇0 can control the conduction of the third switch K6 and the fourth switch K7. Ι00143Ι3#·单号Α0101 Page 18/35 pages 1013091665-0 201230607 On and off and the operation of the second DC-DC module 3. Fig. 18 is a waveform timing chart corresponding to the heating circuit of Fig. 17, in which Vei refers to the voltage value of the first charge storage element C1, and 1± refers to the current value of the current flowing through the first switch K1. The operation of the heating circuit shown in Figure 17 is as follows:

a) The switch control module 100 controls the third switch K6 and the fourth switch K7 to be turned on, and the energy storage circuit starts to work. As shown in FIG. 18, the battery E passes through the third switch K6 and the fourth unidirectional semiconductor component. D11, the first charge storage element C1 performs forward discharge (as shown in the positive half period of the current flowing through the first switch K1 in the tl period in FIG. 18), and passes through the first charge storage element C1, fourth. The switch K7 and the fifth unidirectional semiconductor component D12 are reversely charged (as shown in the negative half cycle of the current flowing through the first switch K1 in the t2 time period in FIG. 18); b) the switch control module 100 controls the third The switch K6 and the fourth switch K7 are turned off when the reverse current is zero; c) the switch control module 100 controls the operation of the second DC-DC module 3, and the first charge memory element C1 passes through the second DC-DC module 3 Converting the alternating current into a direct current output to the battery E to realize the power recharging, and then controlling the second DC-DC module 3 to stop working, as shown in the t3 time period shown in Fig. 18; d) repeating steps a) to c) The battery E is continuously heated by the discharge until the battery E reaches the stop heating condition. The heating circuit provided by the invention can improve the charge and discharge performance of the battery, and in the heating circuit, the energy storage circuit is connected in series with the battery, and when the battery is heated, due to the existence of the series of charge memory elements, the failure of the switching device can be avoided. The safety issue can effectively protect the battery. At the same time, the energy transfer unit is also provided in the heating circuit of the present invention, 10014313^single number A_page 19/35 pages 1013091665-0 201230607, the energy transfer unit can energy in the energy storage circuit when the switching device is turned off Transfer to other energy storage components or to other equipment, so it also plays a role in energy recycling. The preferred embodiments of the present invention have been described in detail above with reference to the drawings, but the present invention is not limited to the specific details of the embodiments described above, and various simple modifications can be made to the technical solutions of the present invention within the scope of the technical idea of the present invention. Simple variations are within the scope of the invention. It should be further noted that the specific technical features described in the above specific embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention has various possible combinations. The method will not be explained otherwise. In addition, any combination of various embodiments of the invention may be made without departing from the spirit of the invention, and should be considered as the disclosure of the invention. BRIEF DESCRIPTION OF THE DRAWINGS [0005] The accompanying drawings are intended to be a In the drawings: Fig. 1 is a schematic view showing a heating circuit of a battery provided by the present invention; Fig. 2 is a schematic view showing an embodiment of the energy transfer unit in Fig. 1; FIG. 4 is a schematic diagram of an embodiment of a second DC-DC module in FIG. 3; FIG. 5 is a schematic diagram of an embodiment of the switching device in FIG. 1; 1()()14313#单单A0101 Page 20/35 pages 1013091665-0 201230607 Fig. 6 is a schematic diagram of an embodiment of the switching device of Fig. 1; Fig. 7 is a switching device of Fig. 1. FIG. 8 is a schematic view showing an embodiment of the switch device in FIG. 1; FIG. 9 is a schematic view showing an embodiment of the switch device in FIG. 1; FIG. 10 is a first view 1 is a schematic view of an embodiment of a switching device in FIG. 1; and FIG. 12 is a schematic view showing an embodiment of the switching device in FIG. 1; The figure provides the battery provided by the invention A schematic diagram of a preferred embodiment of a heating circuit; FIG. 14 is a schematic diagram of an embodiment of the energy consuming unit of FIG. 13; FIG. 15 is a schematic diagram of an embodiment of a heating circuit for a battery provided by the present invention; Figure 17 is a waveform timing diagram corresponding to the heating circuit of Figure 15; Figure 17 is a schematic diagram of an embodiment of the heating circuit of the battery provided by the present invention; and Figure 18 is a waveform timing corresponding to the heating circuit of Figure 17. Figure. [Main component symbol description] [0006] 1 : Switching device 3 : Second DC-DC module 100 : Switch control module 101 : Voltage control unit 103 : Power refill unit

Cl, C3: Charge Memory Element E: Battery LI ' L4 : Current Memory Element 1013091665-0 1(). 14313 Production Order No. A0101 Page 21 of 35201230607 R1, R4, R5: P and Ni components R2, R3, R6: Resistor S1~S4: Bidirectional switch T3: Transformer ΚΙ, K2, K6, K7, K8: Switch K3, K4, K5: bidirectional switches D1, D9, DIO, D11, D12: unidirectional semiconductor component vei: voltage value of first charge storage element C1 current value of current flowing through first switch K1 Wang·time period 10014313 ^^'^^ A〇101 Page 22 of 35 Page 1013091665-0

Claims (1)

201230607 VII. Patent application scope: 1. A heating circuit for a battery, the heating circuit comprising: a switching device; a first damping element; a storage circuit, the energy storage circuit is connected to the battery, and the energy storage circuit comprises a current a memory element and a first charge memory element, the first damping element and the switching device being connected in series with the energy storage circuit; a switch control module, the switch control module being connected to the switch device for controlling the conduction of the switch device Turning off to control the flow of energy between the battery and the energy storage circuit; and an energy transfer unit coupled to the energy storage circuit for after the switching device is turned on and off again, The energy in the tank circuit is transferred to the energy storage element. 2. The heating circuit of claim 1, wherein the first damping element is a parasitic resistance inside the battery, and the current memory element is a parasitic inductance inside the battery; or The first damper element is a Q external resistor, the current memory element is an external inductor, and the first charge memory element is a capacitor. 3. The heating circuit of claim 2, wherein the energy storage component is the battery, the energy transfer unit comprises a power refill unit, the power recharge unit and the energy storage circuit And a connection for transferring energy in the energy storage circuit to the battery after the switching device is turned on and off. 4. The heating circuit of claim 3, wherein the power refill unit comprises a second DC-DC module, the second DC-DC module and the 10014313# single number A0101 23 Page 35 of 1013091665-0 201230607 The first-charge memory element and the battery are respectively connected, and the switch control module is further connected with the first filling module for controlling the second DC- The DC module operates to transfer energy in the first charge storage element into the battery. 5. The heating circuit of claim 2, wherein the switch control module is configured to control the switching device to be turned on and off to control energy flow only from the battery to the energy storage. Circuit. 6. The heating circuit of claim 5, wherein the switching device comprises a first switch and a first unidirectional semiconductor component, the first switch and the first unidirectional semiconductor component being connected in series And then connected in series in the energy storage circuit, the switch control module is connected to the first switch, and is used to control the on and off of the switch to control the on and off of the switch device. 7. The heating circuit of claim 5, wherein the switch is controlled, and the current flowing through the switching device after the switching device is turned on is zero or zero The switching device is controlled to be turned off. 8. The heating circuit of claim 7, wherein the switch control module is configured to control the switch device to turn off before the current flowing through the switch device is zero after the switch is turned on, The switching device includes a second unidirectional semiconductor component, a third unidirectional semiconductor component, a second switch, a second damper component, and a second charge memory component, wherein the second unidirectional semiconductor component and the second switch are sequentially connected in series In the tank circuit, the second damper element and the second charge memory element (4) are then connected in parallel at both ends of the second switch, and the third unidirectional semiconductor element is connected in parallel to the second damper element The two ends 'for renewing the current memory element when the second switch is turned off, the switch control module is connected with the second switch 10014313#单号Α0101 page 24/total 35 page 1013091665 -0 201230607, for controlling the opening of the application by the _the second closing device and the ___ control module _ _ /, the switch said switching device is turned on , F, on and off, so that when the reciprocating flow. b between the battery and the tank circuit as patent ίο 11 Ο Park range of the device 9 for the first bidirectional item. " The circuit of the switch, as claimed in the application for the full-time item, includes a circuit for implementing energy, and wherein the switch has a one-way branch and a means for realizing energy flow from the energy storage circuit The switch control module is connected to the first one-way branch = early road towel I for controlling the switching device to be turned on and off by turning on and off the branch connected by X 1 . 12. The heating circuit of claim 5, wherein the switching device comprises a first bidirectional switch and a third bidirectional switch, the second bidirectional switch and the second bidirectional switch being connected in series with each other To form the first unidirectional branch and the second unidirectional branch, the switch control module is respectively connected to the second bidirectional switch and the third bidirectional switch for controlling the first bidirectional Turning on and off of the switch and the third bidirectional switch to control conduction and deactivation of the first one-way branch and the second one-way branch. The heating circuit of claim 5, wherein the switching device comprises a third switch, a fourth unidirectional semiconductor component, and a fifth unidirectional semiconductor component, the third switch and the fourth unidirectional The semiconductor elements are connected in series to each other to form the first unidirectional branch, and the fifth unidirectional semiconductor element constitutes the A single number 10014313 Γ A0101 page 25 / 35 pages 1013091665-0 201230607 second unidirectional branch, said The switch control module is coupled to the third switch for controlling the turning on and off of the first one-way branch by controlling the turning on and off of the third switch. The heating circuit of the battery of claim 13, wherein the switching device further comprises a fourth switch located in the second one-way branch, the fourth switch and the fifth one-way The semiconductor components are connected in series, and the switch control module is further connected to the fourth switch for controlling the on and off of the second one-way branch by controlling the on and off of the fourth switch. The heating circuit of claim 11, wherein the switching device further comprises a resistor in series with the first one-way branch and/or the second one-way branch. The heating circuit of claim 9, wherein the switch control module is configured to control the current flowing through the switching device after the switching device is turned on, or after zero The switching device is turned off. The heating circuit of claim 1, wherein the heating circuit further comprises an energy consuming unit connected to the first charge storage element, the energy consuming unit And consuming the energy in the first charge storage element after the energy transfer unit performs energy transfer after the switching device is turned on and off again, or after the energy transfer unit performs energy transfer, The energy in the first charge storage element is consumed. The heating circuit of claim 17, wherein the energy consuming unit comprises a voltage control unit, the voltage control unit being coupled to the first charge storage element for conducting in the switching device After the power is turned off, the voltage transfer unit is converted into a voltage setting value, or Page 1013091665-0 201230607 After the amount transfer unit performs energy transfer, the energy in the first charge storage element is consumed. 19. The heating circuit of claim 18, wherein the voltage control unit comprises a third damping element and a fifth switch, the third damping element and the fifth switch being connected in series after being connected in parallel The switch control module is further configured to be connected to the fifth switch, the switch control module is further configured to control the fifth after controlling the switch device to be turned on and off again The switch is turned on. 〇 1001431#单单 A〇101 Page 27 of 35 1013091665-0