CN210468042U - Heating battery pack - Google Patents
Heating battery pack Download PDFInfo
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- CN210468042U CN210468042U CN201921650329.7U CN201921650329U CN210468042U CN 210468042 U CN210468042 U CN 210468042U CN 201921650329 U CN201921650329 U CN 201921650329U CN 210468042 U CN210468042 U CN 210468042U
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- battery pack
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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
Abstract
The utility model provides a heating battery package, include: battery package, heating element, heating device, switching element. The battery pack comprises a first battery module capable of being charged; the heating element is arranged inside the battery pack and is attached to the first battery module; the heating device comprises a second battery module used for supplying power to the heating element; the switching element is connected between the second battery module and the heating element. Through the scheme, the situation that the thermal runaway of the rechargeable battery in the battery pack is prevented can be realized.
Description
Technical Field
The utility model relates to a rechargeable battery technical field especially relates to a heating battery package.
Background
Lithium batteries have become the main power source for electric vehicles because they have many advantages, such as reduced pollution, long life cycle, high energy density, good power performance, etc., but the performance of lithium batteries is poor at low temperatures. In a low-temperature environment, the activity of the anode and cathode materials of the lithium battery and the conductivity of the electrolyte are reduced, so that the charging and discharging characteristics of the battery are influenced. Along with the reduction of temperature, lithium cell discharge performance is showing and is descending, and the platform that discharges obviously reduces, and the electric quantity that discharges obviously reduces, and in the use, the battery falls electric speed and can obviously accelerate, and in addition, along with the reduction of temperature, the charge time can corresponding increase, and the electric quantity is more difficult to be full of simultaneously.
For this reason, the battery must take heating measures in a low-temperature environment. However, in the actual heating process, the heating control system is accidentally broken down, the battery is continuously heated, when the battery is heated to a certain temperature, thermal runaway occurs in the battery, and personal safety and property safety are threatened once the thermal runaway occurs. Two heating methods that the electric motor car adopted at present: one is self-heating of the battery, and the other is to take power from the power grid and heat through a vehicle-mounted charging heating loop.
The self-heating mode of the battery: at present, the heating power of the common lithium iron phosphate and ternary batteries is limited at low temperature, and the rapid heating cannot be realized; moreover, the heating energy is high, and once the heating control system breaks down, the battery is heated to thermal runaway, so that safety risk is generated.
The method for designing the remote pre-charging function by the vehicle is as follows: before starting, the mobile phone is used for commanding the vehicle to take electricity from the power grid through the vehicle-mounted charger to heat the battery in advance. The disadvantages are that: firstly, the method is totally governed by artificial subjective factors, and once a user forgets to pre-charge and heat the battery remotely before starting, a large amount of time is spent for waiting; secondly, the power supply current of the vehicle-mounted charger is very small, and the pre-charging and heating are slow; third, the power of the grid is unlimited, and once the heating control system fails, the battery is heated to thermal runaway creating a safety risk.
SUMMERY OF THE UTILITY MODEL
The utility model provides a heating battery package to the realization prevents that rechargeable battery in the battery package from taking place the thermal runaway.
In order to achieve the above purpose, the utility model adopts the following scheme to realize:
according to an aspect of the embodiments of the present invention, there is provided a heating battery pack, including:
the battery pack comprises a first battery module capable of being charged;
the heating element is arranged inside the battery pack and is attached to the first battery module;
the heating device comprises a second battery module and is used for supplying power to the heating element;
and the switching element is connected between the second battery module and the heating element.
In some embodiments, the heating battery pack further comprises: and the battery management system is connected with the first battery module and is connected with the switch control end of the switch element.
In some embodiments, the switching element is a relay.
In some embodiments, the second battery module includes a rechargeable battery.
In some embodiments, all of the batteries in the second battery module are rechargeable batteries; the capacity of the second battery module is not more than a set electric quantity value.
In some embodiments, the set power value is greater than the minimum power required for heating the first battery module and less than the safe heating power of the first battery module.
In some embodiments, at least one battery in the second battery module is a power type battery.
In some embodiments, the battery management system is located inside or outside the battery pack.
In some embodiments, the switching element is located inside or outside the battery pack.
The utility model discloses heating battery package, battery outside the rechargeable battery module through utilizing the battery package provides limited electric quantity for heating element, can avoid taking place battery management system at switching element and break down, can not effectively break off heating circuit when the battery heating, and too much electric quantity supplies with heating element and causes the rechargeable battery module in the battery package to take place the danger of thermal runaway.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts. In the drawings:
fig. 1 is a schematic structural diagram of a heating battery pack according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are described in further detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
Fig. 1 is a schematic structural diagram of a heating battery pack according to an embodiment of the present invention. Referring to fig. 1, in some embodiments, heating a battery pack may include: heating device 1, battery pack 2, heating element 21, and switching element 24. The battery pack 2 includes a first battery module 22 that can be charged. The heating element 21 is disposed inside the battery pack 2, and the heating element 21 is attached to the first battery module 22. The heating device 1 comprises a second battery module for powering said heating element 24. The switching element 21 is connected between the second battery module and the heating element 21.
Further, the heating battery pack of the above embodiment may further include a battery management system 23. And a battery management system 23 connected to the first battery module 22 and to a switching control terminal of the switching element 21. In other embodiments, the switching element 21 may be manually switched on and off.
The battery pack 2 may be an existing battery pack, for example, a battery pack for supplying power to an electric vehicle. The battery pack 2 may include a Battery Management System (BMS) in addition to the rechargeable battery module, and may estimate and calculate the charging capacity, temperature, and the like of the rechargeable battery module. In addition, the battery pack 2 may include a housing, and when the description is made in the inside of the battery pack, the description may refer to the inside of the housing, that is, the description may be considered as belonging to a part of the battery pack 2.
The heating element 21 may be located inside the battery pack 2, which may mean inside the housing of the battery pack, or the heating element 21 may be considered to be part of the battery pack 2. The heating element 21 is attached to the first battery module 22, for example, to the bottom wall, the upper wall, or the side wall of the battery or the heat sink of the first battery module 22. The shape of the heating element 21 may be various shapes, for example, may be determined according to the outer wall condition of the first battery module 22 to more facilitate the transfer of heat to the first battery module 22. More specifically, the heating element 21 may have a plate shape, for example, and may have a curved shape conforming to the outer wall of the first battery module 22, for example, a heating plate. The material of the heating element 21 may be any material that is convenient for heating by electric energy, for example, a metal material.
The second battery module in the heating device 1 may include a rechargeable battery, for example, all or part of the batteries in the second battery module are rechargeable batteries. The electric quantity (total electric quantity) of the second battery module can be set as required, so that the first battery module is not thermally out of control even if the battery management system 23 fails to fully discharge. In addition, the heating device 1 may include a case in which the second battery module may be placed. When the electric quantity in the second battery module is not enough to heat the first battery module in the battery pack to the normal use temperature and the first battery module does not need to be heated, the second battery module can be charged. The rechargeable battery in the second battery module can be charged by an external power source, for example, a power source of a power grid.
For example, all the batteries in the second battery module are rechargeable batteries, in which case the capacity (maximum charge capacity) of the second battery module is set to be not greater than a set charge value. Further, the set electric quantity value can be larger than the minimum electric quantity of the heating requirement of the first battery module and smaller than the safe heating electric quantity of the first battery module. The set electric quantity value may be determined according to at least one parameter among a heat loss coefficient, a specific heat capacity of the first battery module, a mass of the first battery module, and an average temperature rise of the first battery module. In particular, the number or model of the batteries may be determined according to at least one of the parameters, or the charging amount of the rechargeable batteries may be controlled. The maximum charge of the second battery module is determined according to the specified parameters, so that the second battery module is not subjected to thermal runaway when the second battery module is completely discharged to the heating element 21.
Further, for example, the set electric quantity value may be:
wherein K is a heat loss coefficient, c is a specific heat capacity of the first battery module, m is a mass of the first battery module, and Δ t is an average temperature rise of the first battery module.
In some embodiments, at least one battery in the second battery module may be a power type battery. Further, the batteries in the second battery module may be all power type batteries. The use of the power type battery can instantaneously supply a large power current to the heating element 21, thereby facilitating the heating element 21 to heat the first battery module 22 to a desired temperature in a short time.
The switching element 24 may be connected in series between the second battery module and the heating element 21 in order to control connection or disconnection between the second battery module and the heating element 21 using the switching element 24. The switching element 24 may be any of a variety of on/off controllable switches, for example, a relay or a CMOS switching device.
Referring again to fig. 1, the switching element 24 is located inside the battery pack 2 (e.g., within the housing of the battery pack). In other embodiments, the switch element 24 may be located outside the battery pack 2, in which case a separate housing may be used to house the switch element 24, for example, the switch element may be located outside the battery pack (either outside the heating device or inside the heating device in the case of a heating device outside the battery pack) or inside the battery pack together with the battery management system. In still other embodiments, the switch element 24 may be located inside the heating device 1 (e.g., within the housing of the heating device).
The battery management system 23 is connected to the first battery module, and can be used for detecting the temperature of the first battery module 22; the battery management system 23 is further connected to the switch element 24, so that the switch element 24 can be controlled to be turned on or off according to the detected temperature of the first battery module 22, so as to achieve that the temperature of the first battery module or the environment where the first battery module is located reaches the target temperature. The battery management system 23 is implemented by using an existing Battery Management System (BMS).
The conventional battery management system may sense the temperature of the first battery module 22 in real time through a temperature sensor therein. In the normal heating process, the battery management system can judge whether the temperature of first battery module 22 exceeds preset alarm temperature, if exceed preset alarm temperature, the battery management system can send a signal to the consumer (for example, an electric automobile) of first battery module 22, after the consumer agrees, the battery management system disconnects switch element 21, no heating is performed, but when the battery management system fails and detects no first battery module temperature, switch element 21 is adhered or in a conducting state, the first battery module is continuously heated until the thermal runaway is heated.
In the heated battery pack shown in fig. 1, the battery management system 23 is located inside the battery pack 2. In other embodiments, the battery management system 23 may be located outside the battery pack 2.
In the embodiments, the limited electric quantity is provided for the heating element by using the batteries except the rechargeable battery module of the battery pack, so that the danger that the rechargeable battery module in the battery pack is out of control due to the fact that excessive electric quantity is supplied to the heating element when the battery management system is turned on and fails can be avoided. Furthermore, the power type battery is selected for providing a power supply for the heating element, so that the rechargeable battery module of the battery pack can be rapidly heated.
In some embodiments, there is provided a safe and rapid heating battery pack, including: the heating element is arranged on the battery module and used for heating the battery module; the heating device is used for supplying power to the heating element, and a battery pack is arranged in the heating device.
Optionally, the above-mentioned safety rapid heating battery pack may further include a switching element, which may be a relay, disposed between the heating device and the heated element, and electrically connected to the heating device and the heated element.
Optionally, the rapid heating battery pack may further include a battery management system, where the battery management system is disposed inside or outside the battery pack, manages a heated target temperature of the battery module, and controls on/off of the switch element.
Optionally, the battery pack arranged inside the heating device has a certain electric quantity, so that the battery module cannot be continuously heated to exceed a preset temperature in the whole heating process even if the battery management system fails.
Optionally, the heating means comprises a plurality of power cells.
Optionally, the heating device is disposed inside or outside the battery pack.
The safe heating battery pack of the embodiments can not generate thermal runaway and can still work normally at low temperature. Furthermore, power type batteries are adopted to provide power for the heating element, so that the discharge rate is high, and the first battery module is rapidly heated.
In order to make the present invention better understood by those skilled in the art, the following description will be given of embodiments of the present invention with reference to specific examples.
Referring again to fig. 1, an embodiment provides a safe and rapid heating battery pack, including: the heating device comprises a heating device 1 outside a battery box (a shell of a battery pack), a first battery module 22 and a heating element 21, wherein the first battery module 22 and the heating element 21 are arranged in the battery box, and the heating element 21 is arranged on a heated surface of the first battery module 22 and is used for heating the first battery module 22; the heating device 1 (in which a battery is arranged) electrically connects the switch element 24 to the heating element 21 for supplying power to the heating element 21, and the battery management system 23 in the battery box controls the on-off of the switch element 24 and manages the target temperature for heating the battery module. When the battery needs to be heated, the battery management system 23 controls the switching element 24 to be turned on, and when the battery module reaches the target temperature, the battery management system 23 controls the switching element 24 to be turned off. When the battery starts to heat up, the sudden battery management system 23 fails to control the switch element 21 (relay) to be turned off, the first battery module 22 will be heated continuously, but the battery capacity of the heating device 1 is limited, which is greater than the minimum required battery capacity for heating the first battery module, and is less than the safe heating capacity of the first battery module, and the specific calculation may be:
Δt＝t1-t2，
wherein Q represents the amount of charge in the battery pack in the heating apparatus 1, K represents a heat loss coefficient, c represents the specific heat capacity of the battery to be heated, m represents the mass of the battery to be heated, Δ t represents the average temperature rise of the battery to be heated, t represents the average temperature rise of the battery to be heated1Represents the average temperature at the end of heating of the battery to be heated, t2Indicating the initial temperature of the heated battery.
The heating device 1 supplies power to the heating element 21, the heating element 21 is used for heating the first battery module, and heat loss occurs during the whole heating process, such as: assuming that the lowest working temperature of a general battery core required for slow charging is 0 ℃, the minimum electric quantity required for heating the battery module is the electric quantity corresponding to the lowest temperature of the battery, namely 0 ℃ (the line loss is very small and can be ignored), the highest working temperature of the general battery core required for slow charging is 60 ℃, the safe electric quantity required for heating the battery module is the electric quantity corresponding to the highest temperature of the battery, namely 60 ℃, the heating efficiency of a heating element is 50%, K can be 0.5, the working temperature range of the battery is 0-60 ℃, the temperature consistency is 10 ℃, the environmental temperature is-35 ℃ (the initial temperature), c and m are known, the Q range value can be calculated, the embodiment provides a safe and rapid heating technology, a battery pack with a certain electric quantity is arranged in a heating device, the electric quantity of the battery pack is designed according to the target temperature of the battery required to be heated, so as to, even if the heating control system fails, thermal runaway will not occur. In addition, the heating device can rapidly heat in a low-temperature or ultra-low-temperature environment. Wherein, the group battery adopts power type battery, has the characteristic: the material supports large-rate charge and discharge, is more than 10 ℃, has particularly excellent low-temperature characteristics, and can still normally charge and discharge at ultralow temperature of-40 ℃. Therefore, the heating battery pack can be safely and quickly heated.
In the description herein, reference to the description of the terms "one embodiment," "a particular embodiment," "some embodiments," "for example," "an example," "a particular example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. The sequence of steps involved in the embodiments is for illustrative purposes, and the sequence of steps is not limited and may be adjusted as desired.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A heated battery pack, comprising:
the battery pack comprises a first battery module capable of being charged;
the heating element is arranged inside the battery pack and is attached to the first battery module;
the heating device comprises a second battery module and is used for supplying power to the heating element;
and the switching element is connected between the second battery module and the heating element.
2. The heated battery pack of claim 1, further comprising:
and the battery management system is connected with the first battery module and is connected with the switch control end of the switch element.
3. The heating battery pack according to claim 1, wherein the switching element is a relay.
4. The heated battery pack of claim 1, wherein the second battery module comprises a rechargeable battery.
5. The heating battery pack according to claim 4, wherein all the batteries in the second battery module are rechargeable batteries; the capacity of the second battery module is not more than a set electric quantity value.
6. The heating battery pack of claim 5, wherein the set power value is greater than the minimum power required for heating the first battery module and less than the safe heating power of the first battery module.
7. The heating battery pack according to any one of claims 1 to 6, wherein at least one battery in the second battery module is a power type battery.
8. The heated battery pack of claim 2, wherein the battery management system is located inside or outside the battery pack.
9. The heated battery pack of claim 8, wherein the switching element is located inside or outside the battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921650329.7U CN210468042U (en) | 2019-09-30 | 2019-09-30 | Heating battery pack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921650329.7U CN210468042U (en) | 2019-09-30 | 2019-09-30 | Heating battery pack |
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| CN210468042U true CN210468042U (en) | 2020-05-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112721739A (en) * | 2020-12-29 | 2021-04-30 | 精进电动科技股份有限公司 | Method for driving motor to actively heat battery pack and new energy automobile |
| CN117080624A (en) * | 2023-09-13 | 2023-11-17 | 苏州华骞时代新能源科技有限公司 | Battery heating control method and system |
-
2019
- 2019-09-30 CN CN201921650329.7U patent/CN210468042U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112721739A (en) * | 2020-12-29 | 2021-04-30 | 精进电动科技股份有限公司 | Method for driving motor to actively heat battery pack and new energy automobile |
| CN112721739B (en) * | 2020-12-29 | 2022-05-17 | 精进电动科技股份有限公司 | Method for driving motor to actively heat battery pack and new energy automobile |
| CN117080624A (en) * | 2023-09-13 | 2023-11-17 | 苏州华骞时代新能源科技有限公司 | Battery heating control method and system |
| CN117080624B (en) * | 2023-09-13 | 2024-04-05 | 苏州华骞时代新能源科技有限公司 | Battery heating control method and system |
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