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CN1630129A - Devices for heating and charging rechargeable batteries at low temperatures - Google Patents

Devices for heating and charging rechargeable batteries at low temperatures Download PDF

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CN1630129A
CN1630129A CNA2003101206785A CN200310120678A CN1630129A CN 1630129 A CN1630129 A CN 1630129A CN A2003101206785 A CNA2003101206785 A CN A2003101206785A CN 200310120678 A CN200310120678 A CN 200310120678A CN 1630129 A CN1630129 A CN 1630129A
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battery
charging
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CN1303720C (en
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郭擎志
许英豪
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BenQ Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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Abstract

A device for heating and charging a rechargeable battery at low temperature comprises a charging device, a heating device, a first switch and a protection device. When the ambient temperature is too low (for example, lower than 0 ℃), the first switch is switched to the conducting state, so that the heating device receives the voltage through the first switch to generate heat energy, and the ambient temperature is further increased. When the rechargeable battery is charged to a high capacity (85-100% of the rated battery capacity), the protection device stops the heating device from receiving the voltage, so as to achieve the effect of saving energy.

Description

低温下对可充电式电池加热及充电的设备Devices for heating and charging rechargeable batteries at low temperatures

技术领域technical field

本发明涉及一种电池充电设备，特别涉及一种低温下对可充电式电池加热及充电的设备。The invention relates to a battery charging device, in particular to a device for heating and charging a rechargeable battery at low temperature.

背景技术Background technique

可充电式电池被使用在各种不同的电子装置中，包括便携式计算机、便携式计算机外设产品、个人数字助理(PDAs)、移动电话及相机等等。由于被广泛地使用，遂发展出各种具有不同化学物质的可充电式电池，而每一种皆有其优缺点。其中，最常被使用的可充电式电池为镍镉电池(NiCad)、镍氢电池(NiMH)、锂电池(Li-ion)及锂聚合电池(Li-polymer)。Rechargeable batteries are used in various electronic devices, including portable computers, peripheral products of portable computers, personal digital assistants (PDAs), mobile phones, cameras, and so on. Due to their widespread use, various rechargeable batteries have been developed with different chemistries, each with its own advantages and disadvantages. Among them, the most commonly used rechargeable batteries are nickel-cadmium batteries (NiCad), nickel-metal hydride batteries (NiMH), lithium batteries (Li-ion) and lithium polymer batteries (Li-polymer).

近年来，锂电池(Li-ion)已成为可充电式电池的首选，主要使用于便携式计算机。锂电池(Li-ion)内部的化学组成包括：镀锂薄片阳极、有机电解液、碳电极内的锂化合物。与镍氢电池(NiMH)或镍镉电池(NiCad)相比，锂电池(Li-ion)具有较高的能量密度、较佳的周期生命、较高的输出电压及较低的自放电率。然而，锂电池(Li-ion)具有一使用上的限制，此限制亦可能出现于使用别种电池时，此限制为，当被充电至高容量(额定电池容量的85-100％)或暴露在高温(通常指高于45℃)时，电池很容易损坏。上述的情形会造成电池永久性的效能下降，甚至会失去功能而无法再使用。而当温度过低时，会有活性下降的情形，也会造成电池永久性的效能下降。In recent years, lithium batteries (Li-ion) have become the first choice for rechargeable batteries, mainly used in portable computers. The internal chemical composition of a lithium battery (Li-ion) includes: a lithium-plated thin sheet anode, an organic electrolyte, and a lithium compound in a carbon electrode. Lithium batteries (Li-ion) have higher energy density, better cycle life, higher output voltage, and lower self-discharge rate than nickel-metal hydride batteries (NiMH) or nickel-cadmium batteries (NiCad). However, lithium batteries (Li-ion) have a usage limitation that may also occur when using other batteries. This limitation is that when charged to a high capacity (85-100% of the rated battery capacity) or exposed to At high temperature (usually higher than 45°C), the battery is easily damaged. The above-mentioned situation will cause the battery performance to decrease permanently, or even lose its function and become unusable. And when the temperature is too low, there will be a decrease in activity, which will also cause a permanent decrease in the performance of the battery.

因此，环境温度，或更明确地说可充电式电池的温度，必须在一适当温度范围内，以使电池能被充电。普遍来讲，几乎每个充电装置本身皆具有一温度检测装置，用以检测环境温度并将结果回传至充电装置。Therefore, the ambient temperature, or more specifically the temperature of the rechargeable battery, must be within an appropriate temperature range for the battery to be charged. Generally speaking, almost every charging device has a temperature detection device for detecting the ambient temperature and sending the result back to the charging device.

图1表示已知充电装置103的区块示意图。一可充电式电池107耦接至上述充电装置103。上述充电装置103具有一温度检测装置105及一充电控制电路104。上述温度检测装置105检测一环境温度，若检测到的温度落在一适当范围内(通常为0℃至45℃)，上述充电控制电路104控制上述充电装置103自一电压源101接收一电压，来对上述可充电式电池107充电。若上述温度达到下限(0℃)或上限(45℃)时，上述充电装置103停止充电以保护上述可充电式电池107，避免电池效能下降或发生不可预期的危险，例如电池爆炸。因此，传统上所使用的充电装置无法用于异常寒冷的情形下，例如下雪夜晚的户外。FIG. 1 shows a block diagram of a conventional charging device 103 . A rechargeable battery 107 is coupled to the charging device 103 . The charging device 103 has a temperature detection device 105 and a charging control circuit 104 . The above-mentioned temperature detection device 105 detects an ambient temperature, and if the detected temperature falls within an appropriate range (usually 0°C to 45°C), the above-mentioned charging control circuit 104 controls the above-mentioned charging device 103 to receive a voltage from a voltage source 101, To charge the above-mentioned rechargeable battery 107. If the temperature reaches the lower limit (0° C.) or the upper limit (45° C.), the charging device 103 stops charging to protect the rechargeable battery 107, avoiding battery performance degradation or unexpected dangers, such as battery explosion. Therefore, the traditionally used charging device cannot be used in extremely cold conditions, such as outdoors at snowy nights.

发明内容Contents of the invention

有鉴于此，为了解决上述问题，本发明主要目的在于提供一种低温下对可充电式电池加热及充电的设备，包括：一充电装置，耦接一电压源，具有一温度检测装置及一充电控制电路，当一环境温度在一既定温度范围内，上述充电装置对上述可充电式电池充电，其中，上述温度检测装置用以检测上述环境温度，上述充电控制电路根据接收自上述温度检测装置的上述环境温度，用以决定是否对上述可充电式电池充电；；一加热装置，当上述加热装置接收上述电压源的一电压时，用以产生热能，使上述环境温度上升；一第一开关，耦接上述电压源及上述加热装置，用以控制是否将上述电压输入至上述加热装置中，其中，当上述环境温度小于一第一既定温度值时，上述第一开关切换为导通状态，使上述加热装置经由上述第一开关以接收上述电压，当上述环境温度大于一第二既定温度值时，上述第一开关切换为关闭状态，使上述加热装置停止接收上述电压；以及一保护装置，耦接于上述第一开关与上述加热装置之间，用以检测上述可充电式电池的充电状态，当上述可充电式电池的充电状态达到一既定条件时，使上述加热装置停止接收上述电压。In view of this, in order to solve the above problems, the main purpose of the present invention is to provide a device for heating and charging rechargeable batteries at low temperature, including: a charging device, coupled to a voltage source, with a temperature detection device and a charging device A control circuit, when an ambient temperature is within a predetermined temperature range, the above-mentioned charging device charges the above-mentioned rechargeable battery, wherein the above-mentioned temperature detection device is used to detect the above-mentioned ambient temperature, and the above-mentioned charging control circuit The ambient temperature is used to determine whether to charge the rechargeable battery; a heating device is used to generate heat when the heating device receives a voltage from the voltage source to increase the ambient temperature; a first switch, Coupling the above-mentioned voltage source and the above-mentioned heating device to control whether the above-mentioned voltage is input to the above-mentioned heating device, wherein, when the above-mentioned ambient temperature is lower than a first predetermined temperature value, the above-mentioned first switch is switched to a conduction state, so that The above-mentioned heating device receives the above-mentioned voltage through the above-mentioned first switch. When the above-mentioned ambient temperature is greater than a second predetermined temperature value, the above-mentioned first switch is switched to an off state, so that the above-mentioned heating device stops receiving the above-mentioned voltage; and a protection device, coupled Connected between the first switch and the heating device, it is used to detect the charging state of the rechargeable battery, and when the charging state of the rechargeable battery reaches a predetermined condition, the heating device stops receiving the voltage.

附图简述Brief description of the drawings

为使本发明的上述目的、特征和优点能更明显易懂，下文特举一较佳实施例，并配合附图，作详细说明如下：In order to make the above-mentioned purpose, features and advantages of the present invention more obvious and understandable, a preferred embodiment is specially cited below, and in conjunction with the accompanying drawings, the detailed description is as follows:

图1表示已知充电装置的区块示意图。FIG. 1 shows a block diagram of a known charging device.

图2表示本发明的电池充电设备的区块示意图。FIG. 2 shows a schematic block diagram of the battery charging device of the present invention.

附图符号说明：Explanation of reference symbols:

101、201～电源；202～电池充电设备；103、203～充电装置；104、204～充电控制电路；105、205～温度检测装置；107、207～可充电式电池；209～保护装置；211～电压检测装置；213～加热装置；S1～第一开关；以及S2～第二开关。101, 201 ~ power supply; 202 ~ battery charging equipment; 103, 203 ~ charging device; 104, 204 ~ charging control circuit; 105, 205 ~ temperature detection device; 107, 207 ~ rechargeable battery; 209 ~ protection device; 211 ~voltage detection device; 213~heating device; S1~first switch; and S2~second switch.

具体实施方式Detailed ways

图2表示本发明的电池充电设备202的区块示意图。上述电池充电设备202在低温下用以对一可充电式电池207加热及充电，包括一充电装置203，一加热装置213，一第一开关S1，以及一保护装置209，其中上述充电装置203耦接至一电压源201，其中上述充电装置203具有一温度检测装置205及一充电控制电路204，且其中上述保护装置209具有一第二开关S2及一电压检测装置211。FIG. 2 shows a block diagram of a battery charging device 202 of the present invention. The battery charging device 202 is used for heating and charging a rechargeable battery 207 at low temperature, and includes a charging device 203, a heating device 213, a first switch S1, and a protection device 209, wherein the charging device 203 is coupled to Connected to a voltage source 201 , wherein the charging device 203 has a temperature detection device 205 and a charging control circuit 204 , and wherein the protection device 209 has a second switch S2 and a voltage detection device 211 .

上述可充电式电池207耦接至上述充电装置203。上述充电装置203具有一温度检测装置205及一充电控制电路204。上述温度检测装置205检测一环境温度，若检测到的温度落在适当的一既定温度范围内(0℃至45℃)，上述充电控制电路204控制上述充电装置203自上述电压源201接收一电压，来对上述可充电式电池207充电。若上述温度达到下限(0℃)或上限(45℃)，上述充电装置203停止充电以保护上述可充电式电池207，避免电池效能下降或发生不可预期的危险，例如电池爆炸。The rechargeable battery 207 is coupled to the charging device 203 . The charging device 203 has a temperature detection device 205 and a charging control circuit 204 . The above-mentioned temperature detection device 205 detects an ambient temperature, and if the detected temperature falls within an appropriate predetermined temperature range (0°C to 45°C), the above-mentioned charging control circuit 204 controls the above-mentioned charging device 203 to receive a voltage from the above-mentioned voltage source 201 , to charge the above-mentioned rechargeable battery 207. If the temperature reaches the lower limit (0° C.) or the upper limit (45° C.), the charging device 203 stops charging to protect the rechargeable battery 207, avoiding battery performance degradation or unexpected dangers, such as battery explosion.

上述第一开关S1耦接至上述电压源201。上述第一开关S1为温度感应式开关，是随其所处的环境温度而执行导通或关闭的动作。当上述环境温度小于一第一既定温度值时，上述第一开关切换为导通状态，当上述温度大于一第二既定温度值时，上述第一开关切换为关闭状态，当上述温度介于上述第一既定温度值与上述第二既定温度值之间时，上述第一开关的开关状态维持不变。上述第一既定温度值必须设定为高于上述既定温度范围的下限(0℃)，且上述第二既定温度值必须设定为低于上述既定温度范围的上限(45℃)。The first switch S1 is coupled to the voltage source 201 . The above-mentioned first switch S1 is a temperature-sensitive switch, which is turned on or off according to the ambient temperature where it is located. When the above-mentioned ambient temperature is lower than a first predetermined temperature value, the above-mentioned first switch is switched to an on state; when the above-mentioned temperature is greater than a second predetermined temperature value, the above-mentioned first switch is switched to an off state; When the first predetermined temperature value is between the above-mentioned second predetermined temperature value, the switching state of the above-mentioned first switch remains unchanged. The first predetermined temperature value must be set higher than the lower limit (0° C.) of the predetermined temperature range, and the second predetermined temperature value must be set lower than the upper limit (45° C.) of the predetermined temperature range.

市场上提供许多现成的热敏开关(thermal switch)来实作上述第一开关S1。熟习此技艺者可以依照所需要的规格来选用适当的热敏开关。另一种作法为，上述第一开关S1在工作时，内部具有一热敏电阻(thermistor)，上述热敏电阻检测上述环境温度，且随着温度变化改变上述第一开关S1的一偏压，来控制上述第一开关S1的开关状态，使上述第一开关S1的开关状态符合需求。There are many off-the-shelf thermal switches available in the market to implement the above-mentioned first switch S1. Those skilled in the art can select an appropriate thermal switch according to the required specifications. Another method is that when the first switch S1 is working, it has a thermistor inside. The thermistor detects the ambient temperature and changes a bias voltage of the first switch S1 as the temperature changes. to control the switching state of the first switch S1 so that the switching state of the first switch S1 meets requirements.

上述第二开关S2耦接于上述第一开关S1与上述加热装置213之间。正常情形下，上述第二开关S2保持导通。上述第一开关S1与上述第二开关S2用来控制上述电压源201的上述电压是否可以供应至上述加热装置213。The second switch S2 is coupled between the first switch S1 and the heating device 213 . Under normal circumstances, the above-mentioned second switch S2 remains turned on. The first switch S1 and the second switch S2 are used to control whether the voltage of the voltage source 201 can be supplied to the heating device 213 .

举例说明，假使上述可充电式电池207为锂(Li-ion)电池。上述环境温度为零下10℃。上述充电装置203的适当充电温度范围为0℃至45℃。上述第一既定温度值设定为5℃，且上述第二既定温度值设定为10℃。For example, assume that the above-mentioned rechargeable battery 207 is a lithium (Li-ion) battery. The ambient temperature above is minus 10°C. The suitable charging temperature range of the charging device 203 is 0°C to 45°C. The first predetermined temperature value is set at 5°C, and the second predetermined temperature value is set at 10°C.

由于上述环境温度(零下10℃)低于0℃，所以上述充电装置203保持待命状态而不动作。同时，由于上述温度低于5℃，上述第一开关S1切换为导通状态，使得上述加热装置21 3经由上述第一开关S1及上述第二开关S2来接收上述电压，用以产生热能，进而使上述环境温度上升。当上述温度达到0℃，上述充电装置203开始对上述可充电式电池207进行充电，且持续此充电动作直到上述可充电式电池207被充电至高容量(额定电池容量的85-100％)亦或是上述温度达到45℃。当上述温度介于5℃与10℃之间，上述第一开关S1保持导通状态，所以上述加热装置213持续产生热能，并使上述环境温度持续上升。当上述温度到达10℃，上述第一开关S1切换为关闭状态以停止上述加热装置213接收上述电压。Since the ambient temperature (minus 10° C.) is lower than 0° C., the charging device 203 remains in a standby state and does not operate. At the same time, since the above-mentioned temperature is lower than 5°C, the above-mentioned first switch S1 is switched to an on state, so that the above-mentioned heating device 213 receives the above-mentioned voltage through the above-mentioned first switch S1 and the above-mentioned second switch S2 to generate heat energy, and then Raise the ambient temperature above. When the above-mentioned temperature reaches 0°C, the above-mentioned charging device 203 starts to charge the above-mentioned rechargeable battery 207, and continues this charging operation until the above-mentioned rechargeable battery 207 is charged to a high capacity (85-100% of the rated battery capacity) or It is the temperature above that reaches 45°C. When the temperature is between 5° C. and 10° C., the first switch S1 remains on, so the heating device 213 continues to generate heat, and the ambient temperature continues to rise. When the temperature reaches 10° C., the first switch S1 is turned off to stop the heating device 213 from receiving the voltage.

此处可能发生一种情形，在上述温度到达10℃之前，上述可充电式电池207已被充电至高容量(额定电池容量之85-100％)且上述充电装置203停止动作，但是上述加热装置213却仍然持续加热。很显然地，这会造成无意义的能源浪费。实际上，一旦上述可充电式电池207已被充电至高容量且上述充电装置203停止动作，上述加热装置213即可停止动作。A situation may occur here. Before the above-mentioned temperature reaches 10°C, the above-mentioned rechargeable battery 207 has been charged to a high capacity (85-100% of the rated battery capacity) and the above-mentioned charging device 203 stops operating, but the above-mentioned heating device 213 Still heating up. Obviously, this would cause a senseless waste of energy. Actually, once the rechargeable battery 207 has been charged to a high capacity and the charging device 203 stops working, the heating device 213 can stop working.

因此，本发明的上述电压检测装置211用来检测上述可充电式电池207的充电电压值是否达到一既定电压值，若达到上述既定电压值，上述电压检测装置211关闭上述第二开关S2以使上述加热装置213停止接收上述电压。为了保护电池寿命，上述既定电压值设定为4伏特，以低于额定电池容量的4.5伏特。Therefore, the above-mentioned voltage detection device 211 of the present invention is used to detect whether the charging voltage value of the above-mentioned rechargeable battery 207 reaches a predetermined voltage value. If the above-mentioned predetermined voltage value is reached, the above-mentioned voltage detection device 211 closes the above-mentioned second switch S2 to The heating device 213 stops receiving the voltage. In order to protect the battery life, the above predetermined voltage value is set to 4 volts, which is lower than 4.5 volts of the rated battery capacity.

上述电压检测装置211可以用一电流检测装置(图1中未图示出)来替代，来检测上述可充电式电池207的充电电流值是否达到一既定电流值，若达到上述既定电流值，上述电流检测装置关闭上述第二开关S2以使上述加热装置213停止接收上述电压。更进一步地，上述电压检测装置211亦可以用一定时器(图1中未图示出)来替代，以达到相同的功能。上述定时器，在上述充电装置203开始对上述可充电式电池207充电起，计算一既定时间间隔，且在上述既定时间间隔计算完毕时，上述定时器关闭上述第二开关S2以使上述加热装置213停止接收上述电压。上述既定时间间隔可由实验数据来设定一适当值。The above-mentioned voltage detection device 211 can be replaced by a current detection device (not shown in Fig. 1 ) to detect whether the charging current value of the above-mentioned rechargeable battery 207 reaches a predetermined current value, if the above-mentioned predetermined current value is reached, the above-mentioned The current detection device closes the second switch S2 so that the heating device 213 stops receiving the voltage. Furthermore, the above-mentioned voltage detection device 211 can also be replaced by a timer (not shown in FIG. 1 ) to achieve the same function. The above-mentioned timer calculates a predetermined time interval since the above-mentioned charging device 203 starts charging the above-mentioned rechargeable battery 207, and when the above-mentioned predetermined time interval is calculated, the above-mentioned timer closes the above-mentioned second switch S2 to make the above-mentioned heating device 213 stops receiving the above voltage. The aforementioned predetermined time interval can be set to an appropriate value based on experimental data.

综上而论，与已知技术相比，本发明具有两个主要优点。首先，藉由上述第一开关S1与上述加热装置213，上述可充电式电池207可以在低温下被充电。其次，藉由上述电压检测装置211，上述电流检测装置，或者上述定时器来控制上述第二开关S2，一旦上述可充电式电池207已被充电至高容量且上述充电装置203停止动作，上述加热装置213即可停止动作。因此，可以避免不必要的能源浪费。In summary, the present invention has two main advantages over the known technology. Firstly, by means of the first switch S1 and the heating device 213, the rechargeable battery 207 can be charged at low temperature. Next, the above-mentioned second switch S2 is controlled by the above-mentioned voltage detecting device 211, the above-mentioned current detecting device, or the above-mentioned timer. Once the above-mentioned rechargeable battery 207 has been charged to a high capacity and the above-mentioned charging device 203 stops operating, the above-mentioned heating device 213 to stop the action. Therefore, unnecessary waste of energy can be avoided.

本发明虽以较佳实施例揭露如上，然其并非用以限定本发明的范围，任何熟习此项技艺者，在不脱离本发明的精神和范围内，当可做些许的更动与润饰，因此本发明的保护范围当视后附的申请专利范围所界定者为准。Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the scope of the present invention. Anyone skilled in this art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the scope of the appended patent application.

Claims (25)

1, a kind of battery charging equipment in order to a rechargeable type battery is charged, comprising:
One charging device couples a voltage source, when an ambient temperature in a set temperature range, above-mentioned charging device is to above-mentioned rechargeable type battery charge;
One heater when above-mentioned heater receives a voltage of above-mentioned voltage source, in order to produce heat energy, rises above-mentioned ambient temperature; And
One first switch, couple above-mentioned voltage source and above-mentioned heater, whether above-mentioned voltage is inputed in the above-mentioned heater in order to control, wherein, when above-mentioned ambient temperature during less than one first set temperature value, above-mentioned first switch switches to conducting state, make above-mentioned heater via above-mentioned first switch to receive above-mentioned voltage, when above-mentioned ambient temperature during greater than one second set temperature value, above-mentioned first switch switches to closed condition, makes above-mentioned heater stop receive above-mentioned voltage.
2, battery charging equipment as claimed in claim 1, wherein, above-mentioned charging device comprises:
One temperature-detecting device is in order to detect above-mentioned ambient temperature; And
Whether one charging control circuit is according to the above-mentioned ambient temperature that is received from the said temperature checkout gear, in order to determine to above-mentioned rechargeable type battery charge.
3, battery charging equipment as claimed in claim 1, more comprise a second switch, be coupled between above-mentioned first switch and the above-mentioned heater, when the charged state of above-mentioned rechargeable type battery reaches an established condition, above-mentioned second switch switches to closed condition, makes above-mentioned heater stop receive above-mentioned voltage.
4, battery charging equipment as claimed in claim 3, wherein, above-mentioned established condition is that the charging voltage value of above-mentioned rechargeable type battery reaches a set magnitude of voltage.
5, battery charging equipment as claimed in claim 4, more comprise a voltage check device, in order to detect the charging voltage value of above-mentioned rechargeable type battery, control the on off state of above-mentioned second switch, wherein, when the charging voltage value that detects above-mentioned rechargeable type battery when above-mentioned voltage check device reaches above-mentioned set magnitude of voltage, above-mentioned second switch is switched to closed condition, make above-mentioned heater stop receive above-mentioned voltage.
6, battery charging equipment as claimed in claim 3, wherein, above-mentioned established condition is that the charging current value of above-mentioned rechargeable type battery reaches a set current value.
7, battery charging equipment as claimed in claim 6, more comprise a current sensing means, in order to detect the charging current value of above-mentioned rechargeable type battery, control the on off state of above-mentioned second switch, wherein, when the charging current value that detects above-mentioned rechargeable type battery when above-mentioned current sensing means reaches above-mentioned set current value, above-mentioned second switch is switched to closed condition, make above-mentioned heater stop receive above-mentioned voltage.
8, battery charging equipment as claimed in claim 3, wherein, above-mentioned established condition is to reach a given time charging interval of above-mentioned rechargeable type battery at interval.
9, battery charging equipment as claimed in claim 8, more comprise a timer, begin above-mentioned rechargeable type battery charge in above-mentioned charging device, calculate above-mentioned given time at interval, and when above-mentioned given time interval calculation finishes, above-mentioned second switch is switched to closed condition, make above-mentioned heater stop receive above-mentioned voltage.
10, battery charging equipment as claimed in claim 1, wherein, above-mentioned first switch is the temperature induction type switch.
11, battery charging equipment as claimed in claim 1, wherein, above-mentioned first switch comprises a thermistor, and above-mentioned thermistor detects above-mentioned ambient temperature, and, control the on off state of above-mentioned first switch along with variations in temperature changes a bias voltage of above-mentioned first switch.
12, battery charging equipment as claimed in claim 1, wherein, the above-mentioned first set temperature value is greater than the lower limit of above-mentioned set temperature range, and the above-mentioned second set temperature value is less than the upper limit of above-mentioned set temperature range.
13, battery charging equipment as claimed in claim 1, wherein, above-mentioned set temperature range is that 0 degree Celsius is to 45 degree Celsius.
14, a kind of battery charging equipment in order to a rechargeable type battery is charged, comprising:
One charging device, couple a power supply, have a temperature-detecting device and a charging control circuit, when an ambient temperature is in a set temperature range, above-mentioned charging device is to above-mentioned rechargeable type battery charge, and wherein, the said temperature checkout gear is in order to detect above-mentioned ambient temperature, whether above-mentioned charging control circuit is according to the above-mentioned ambient temperature that is received from the said temperature checkout gear, in order to determine to above-mentioned rechargeable type battery charge;
One heater when above-mentioned heater receives a voltage of above-mentioned power supply, in order to produce heat energy, rises above-mentioned ambient temperature;
One first switch, couple above-mentioned power supply and above-mentioned heater, whether above-mentioned voltage is inputed in the above-mentioned heater in order to control, wherein, when above-mentioned ambient temperature during less than one first set temperature value, above-mentioned first switch switches to conducting state, make above-mentioned heater via above-mentioned first switch to receive above-mentioned voltage, when above-mentioned ambient temperature during greater than one second set temperature value, above-mentioned first switch switches to closed condition, makes above-mentioned heater stop receive above-mentioned voltage; And
One protective device; be coupled between above-mentioned first switch and the above-mentioned heater; in order to detect the charged state of above-mentioned rechargeable type battery, when the charged state of above-mentioned rechargeable type battery reaches an established condition, make above-mentioned heater stop receive above-mentioned voltage.
15, battery charging equipment as claimed in claim 14; wherein, above-mentioned protective device comprises a second switch, when the charged state of above-mentioned rechargeable type battery reaches above-mentioned established condition; above-mentioned second switch switches to closed condition, makes above-mentioned heater stop receive above-mentioned voltage.
16, battery charging equipment as claimed in claim 15, wherein, above-mentioned established condition is that the charging voltage value of above-mentioned rechargeable type battery reaches a set magnitude of voltage.
17, battery charging equipment as claimed in claim 16; wherein; above-mentioned protective device more comprises a voltage check device; in order to detect the charging voltage value of above-mentioned rechargeable type battery; control the on off state of above-mentioned second switch, wherein, when the charging voltage value that detects above-mentioned rechargeable type battery when above-mentioned voltage check device reaches above-mentioned set magnitude of voltage; above-mentioned second switch is switched to closed condition, make above-mentioned heater stop receive above-mentioned voltage.
18, battery charging equipment as claimed in claim 15, wherein, above-mentioned established condition is that the charging current value of above-mentioned rechargeable type battery reaches a set current value.
19, battery charging equipment as claimed in claim 18; wherein; above-mentioned protective device more comprises a current sensing means; in order to detect the charging current value of above-mentioned rechargeable type battery; control the on off state of above-mentioned second switch, wherein, when the charging current value that detects above-mentioned rechargeable type battery when above-mentioned current sensing means reaches above-mentioned set current value; above-mentioned second switch is switched to closed condition, make above-mentioned heater stop receive above-mentioned voltage.
20, battery charging equipment as claimed in claim 15, wherein, above-mentioned established condition is to reach a given time charging interval of above-mentioned rechargeable type battery at interval.
21, battery charging equipment as claimed in claim 20; wherein; above-mentioned protective device more comprises a timer; begin above-mentioned rechargeable type battery charge in above-mentioned charging device; calculate above-mentioned given time at interval; and when above-mentioned given time interval calculation finishes, above-mentioned second switch is switched to closed condition, make above-mentioned heater stop receive above-mentioned voltage.
22, battery charging equipment as claimed in claim 14, wherein, above-mentioned first switch is the temperature induction type switch.
23, battery charging equipment as claimed in claim 14, wherein, above-mentioned first switch comprises a thermistor, and above-mentioned thermistor detects above-mentioned ambient temperature, and, control the on off state of above-mentioned first switch along with variations in temperature changes a bias voltage of above-mentioned first switch.
24, battery charging equipment as claimed in claim 14, wherein, the above-mentioned first set temperature value is greater than the lower limit of above-mentioned set temperature range, and the above-mentioned second set temperature value is less than the upper limit of above-mentioned set temperature range.
25, battery charging equipment as claimed in claim 14, wherein, above-mentioned set temperature range is that 0 degree Celsius is to 45 degree Celsius.
CNB2003101206785A 2003-12-18 2003-12-18 Devices for heating and charging rechargeable batteries at low temperatures Expired - Fee Related CN1303720C (en)

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