CN209843910U - Battery heat balance device, battery thermal management system and automobile - Google Patents
Battery heat balance device, battery thermal management system and automobile Download PDFInfo
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- CN209843910U CN209843910U CN201920603037.1U CN201920603037U CN209843910U CN 209843910 U CN209843910 U CN 209843910U CN 201920603037 U CN201920603037 U CN 201920603037U CN 209843910 U CN209843910 U CN 209843910U
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- liquid
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- way valve
- heat
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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 discloses a battery heat balance device, battery thermal management system and car, battery heat balance device includes fluid reservoir, water pump, cross valve, first temperature sensor, second temperature sensor and cross valve controller, the cross valve is used for switching over the flow direction of the liquid in the battery heat balance device; the battery thermal management system comprises the battery thermal balance device, and the automobile is provided with the battery thermal management system. The utility model discloses battery thermal balance device can come to switch the flow direction of liquid according to the temperature of the first liquid mouthful side of battery package and second liquid mouthful side, avoids liquid to cause the battery package internal temperature unbalance with invariable direction flow. The utility model discloses the wide application is in battery thermal management technical field.
Description
Technical Field
The utility model belongs to the technical field of battery thermal management technique and specifically relates to a battery heat balancing unit, battery thermal management system and car.
Background
Products such as electric vehicles and emergency power supply equipment widely use battery packs as power sources. The battery pack is composed of battery cells and a thermal management system, wherein the thermal management system is mainly a radiating pipe in contact with the battery pack. The thermal management system is connected with the cooling/heating medium supply device, so that the cooling/heating medium circulates in the thermal management system, the heat generated in the working process of the battery pack is taken away, or the battery pack is heated, so that the battery pack can work in a proper temperature range.
The battery pack has a certain volume, and thus a certain time is required for the cooling/heating medium to flow inside the battery pack. The time that the cooling/heating medium reaches each battery cell or each part of the battery cell is different in the battery pack, so that the temperature of the cooling/heating medium changes, and the temperature imbalance in the battery pack is caused. The uneven temperature in the battery pack can lead to inconsistent aging degree of the battery monomer, thereby affecting the overall performance of the battery pack and even leading to accidents such as explosion and the like due to heat accumulation.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, an object of the utility model is to provide a battery heat balance device, battery thermal management system and car.
On one hand, the embodiment of the utility model provides a battery heat balance device, including fluid reservoir, water pump, cross valve, first temperature sensor, second temperature sensor and cross valve controller;
the four-way valve is respectively connected with the first opening of the liquid tank, the liquid inlet of the water pump, the liquid outlet of the water pump and the first liquid port of the battery pack through pipelines; the four-way valve is used for communicating a first opening of the liquid tank with a liquid inlet of the water pump and simultaneously communicating a liquid outlet of the water pump with a first liquid port of the battery pack, or communicating the first opening of the liquid tank with a liquid outlet of the water pump and simultaneously communicating the liquid inlet of the water pump with the first liquid port of the battery pack;
the second liquid port of the battery pack is connected with the second opening of the liquid tank through a pipeline;
the first temperature sensor is used for measuring the temperature of a pipeline connected with a first liquid port of the battery pack, and the second temperature sensor is used for measuring the temperature of a pipeline connected with a second liquid port of the battery pack; the first temperature sensor and the second temperature sensor are both connected with the four-way valve controller;
and the four-way valve controller is connected with the control end of the four-way valve.
Further, a heat exchanger is connected between the four-way valve and the battery pack.
Further, the four-way valve is connected with a refrigerant inlet of the heat exchanger, the first liquid port of the battery pack is connected with a refrigerant outlet of the heat exchanger, and a heat medium inlet and a heat medium outlet of the heat exchanger are used for being connected to a heat medium supply device.
Further, the four-way valve is connected with a heat medium inlet of the heat exchanger, the first liquid port of the battery pack is connected with a heat medium outlet of the heat exchanger, and a refrigerant inlet and a refrigerant outlet of the heat exchanger are used for being connected to a refrigerant supply device.
Further, a radiator is mounted on the heat exchanger.
Further, the pipe is made of a good conductor of heat.
On the other hand, the embodiment of the utility model provides a still include a battery thermal management system, it includes in the embodiment of the utility model provides an in a battery heat balance device.
On the other hand, the embodiment of the utility model provides a still include a car, it installs the embodiment of the utility model provides an in battery thermal management system.
The utility model has the advantages that: the embodiment of the utility model provides an in thermal balancing unit of battery can come to switch the flow direction of liquid according to the temperature of the first liquid mouthful side of battery package and second liquid mouthful side, avoids liquid to cause the inside temperature of battery package unbalanced with invariable direction flow.
Drawings
Fig. 1 is a schematic structural diagram of a thermal balancing apparatus for a battery according to an embodiment of the present invention in an operating state;
fig. 2 is a schematic structural diagram of a battery thermal balancing apparatus in another operating state according to an embodiment of the present invention.
Detailed Description
In this embodiment, a battery thermal balance device for performing thermal balance protection on a battery pack includes a liquid tank, a water pump, a four-way valve, a first temperature sensor, a second temperature sensor, and a four-way valve controller;
the four-way valve is respectively connected with the first opening of the liquid tank, the liquid inlet of the water pump, the liquid outlet of the water pump and the first liquid port of the battery pack through pipelines; the four-way valve is used for communicating a first opening of the liquid tank with a liquid inlet of the water pump and simultaneously communicating a liquid outlet of the water pump with a first liquid port of the battery pack, or communicating the first opening of the liquid tank with a liquid outlet of the water pump and simultaneously communicating the liquid inlet of the water pump with the first liquid port of the battery pack;
the second liquid port of the battery pack is connected with the second opening of the liquid tank through a pipeline;
the first temperature sensor is used for measuring the temperature of a pipeline connected with a first liquid port of the battery pack, and the second temperature sensor is used for measuring the temperature of a pipeline connected with a second liquid port of the battery pack; the first temperature sensor and the second temperature sensor are both connected with the four-way valve controller;
and the four-way valve controller is connected with the control end of the four-way valve.
The structure of this embodiment is shown in fig. 1 and 2. The liquid tank is stored with liquid such as water or glycol, and the liquid may also contain additives. Be equipped with first opening 1 and second opening 2 on the fluid reservoir, these two liquid mouths are set to have certain symmetry for the fluid reservoir can two-way use, and liquid both can flow into the fluid reservoir from first opening, flow out the fluid reservoir from the second opening when carrying out duty cycle promptly, also can flow into the fluid reservoir from the second opening, flow out the fluid reservoir from first opening.
And the water pump is provided with a liquid outlet and a liquid inlet. When the water pump works, if the liquid inlet and the liquid outlet of the water pump are both communicated with the pipeline, liquid in the pipeline flows into the water pump from the liquid inlet and flows out of the water pump from the liquid outlet, and liquid circulation is formed.
The four-way valve is provided with an actuator, a valve core and four interfaces, the four interfaces are divided into two groups of two interfaces which are one group under the driving of the actuator by the valve core, and the two interfaces in each group are communicated. Under the control of the four-way valve controller, the actuator can drive the valve core to different positions, so that the interface combination communicated with the four-way valve is changed.
Referring to fig. 1 and 2, the battery pack is provided with a first liquid port 1 and a second liquid port 2, and the first liquid port and the second liquid port are both communicated with a cooling system inside the battery pack, so that liquid can flow into the cooling system inside the battery pack and flow out of the battery pack after heat exchange is completed. The two ports are arranged to have certain symmetry so that the two ports can be used in two directions, namely, when the liquid is circulated, the liquid can flow into the battery pack from the first liquid port and flow out of the battery pack from the second liquid port, and can also flow into the battery pack from the second liquid port and flow out of the battery pack from the first opening.
In this embodiment, the first temperature sensor and the second temperature sensor are PT 1000. The first temperature sensor and the second temperature sensor may convert the temperature signals into electrical signals that the four-way valve controller may read. In this embodiment, the first temperature sensor and the second temperature sensor may be disposed at an inner wall of the respective pipes, thereby accurately measuring the temperature of the liquid in the pipes; if the pipes are manufactured using good thermal conductors, the first temperature sensor and the second sensor may also be arranged on the outer wall of the respective pipe, as well as measuring the temperature of the liquid in the pipe more accurately.
In this embodiment, the four-way valve controller is model RWD62 manufactured by siemens. Two general input ends and two analog quantity output ends are arranged on the RWD62, in the embodiment, the two general input ends on the RWD62 are respectively connected with the first temperature sensor and the second temperature sensor, and one of the analog quantity output ends is connected with the control end of an actuator on the four-way valve.
The actuator on the four-way valve is essentially a relay or a pneumatic device, and the working state of the actuator can be controlled by outputting a high-level or low-level control signal to the actuator.
The RWD62 is integrated with a program, and can output a four-way valve control signal through an analog output end according to the measured value of the first temperature sensor and/or the second temperature sensor, so that the connection state of the four-way valve is switched, and the temperature control function of the four-way valve is realized.
In this embodiment, the set point compensation mode integrated on the RWD62 is utilized, that is, the measurement value of the second temperature sensor is used as the compensation value of the measurement value of the first temperature sensor, so that the measurement value of the first temperature sensor changes in a drifting manner along with the change of the measurement value of the second temperature sensor, which is equivalent to taking the difference value between the measurement value of the first temperature sensor and the measurement value of the second temperature sensor, that is, the temperature difference between the first liquid port and the second liquid port of the battery pack as the parameter on which the temperature control of the four-way valve depends.
The "pipe" is a concept used as a generic term, for example, "a pipe between the four-way valve and the first opening of the tank", "a pipe between the four-way valve and the liquid inlet of the water pump", and "a pipe between the four-way valve and the liquid outlet of the water pump", although they are collectively referred to as "pipes", they are obviously not the same thing as specific matters, and those skilled in the art will not confuse them.
In this embodiment, with the four-way valve control function and the set point drift temperature control function integrated on the RWD62, the working principle of the battery heat balance device is as follows:
when the temperature of the first liquid port side of the battery pack is higher than that of the second liquid port side and the temperature difference is larger than a preset threshold value, which is measured by the RWD62 through the first temperature sensor and the second temperature sensor, the RWD62 drives an actuator arranged on the four-way valve, so that the four-way valve is communicated with the first opening of the liquid tank and the liquid inlet of the water pump, and is simultaneously communicated with the liquid outlet of the water pump and the first liquid port of the battery pack, a liquid circulation loop of the liquid tank → the water pump → the battery pack → the liquid tank is formed, and the flow direction of the liquid in the battery pack is from the first liquid port to the second liquid port, so that the heat of the part close to the first liquid port side in the battery pack can be more taken away by the liquid, and the heat of the part close to the second liquid port side in the battery pack can be relatively less taken away by the liquid, so that the heat in the battery pack tends to be balanced;
when the temperature of the second liquid port side of the battery pack is higher than the temperature of the first liquid port side and the temperature difference is larger than a preset threshold value, which is measured by the RWD62 through the first temperature sensor and the second temperature sensor, the RWD62 drives an actuator arranged on the four-way valve, so that the four-way valve is communicated with the first opening of the liquid tank and the liquid outlet of the water pump, and is simultaneously communicated with the liquid inlet of the water pump and the first liquid port of the battery pack, a liquid circulation loop shown by an arrow in FIG. 2, namely the liquid tank → the battery pack → the water pump → the liquid tank is formed, and the flow direction of liquid in the battery pack is from the second liquid port to the first liquid port, so that the liquid can take away more heat of the part close to the second liquid port side in the battery pack, and relatively less heat of the part close to the first liquid port side in the battery pack, so that the heat balance in the battery pack tends to avoid the internal;
to sum up, the principle of the battery thermal balance device in this embodiment is that the temperature distribution situation inside the battery pack is judged by measuring the temperature of the first liquid port side and the second liquid port side of the battery pack, and the flow direction of the liquid is switched, so that the imbalance of the temperature inside the battery pack caused by the liquid flowing in a constant direction is avoided.
Further as a preferred embodiment, referring to fig. 1 and 2, a heat exchanger is further connected between the four-way valve and the battery pack. The heat exchanger is respectively connected with the four-way valve and the first liquid port of the battery pack through pipelines, so that liquid between the four-way valve and the battery pack flows through the heat exchanger.
The heat exchanger is provided with a refrigerant inlet, a refrigerant outlet, a heat medium inlet and a heat medium outlet, and can accelerate heat exchange between the heat medium and the refrigerant. In this embodiment, two different connections are used to achieve heating or cooling of the battery pack, respectively.
As a first connection method, the four-way valve is connected with a refrigerant inlet of the heat exchanger, the first liquid port of the battery pack is connected with a refrigerant outlet of the heat exchanger, and a heat medium inlet and a heat medium outlet of the heat exchanger are used for being connected to a heat medium supply device. In this connection, the liquid flowing through the battery pack is used as a cooling medium to be heated by the heating medium introduced into the heat exchanger, and then the heat is transferred to the battery pack. The connection method can be applied to heating the battery pack in a cold environment so as to improve the performance of the battery pack.
As a second connection method, the four-way valve is connected with a heat medium inlet of the heat exchanger, the first liquid port of the battery pack is connected with a heat medium outlet of the heat exchanger, and a refrigerant inlet and a refrigerant outlet of the heat exchanger are used for being connected to a refrigerant supply device. In this connection, the liquid flowing through the battery pack absorbs heat from the battery pack and serves as a heating medium to be cooled by the refrigerant introduced into the heat exchanger. This connection can accelerate the cooling effect on the battery pack.
Both the first and second connections of the heat exchanger may themselves risk leading to an imbalance in the temperature inside the battery pack. Through using cross valve, first temperature sensor, second temperature sensor and cross valve controller in this embodiment, can switch the liquid flow direction in the pipeline according to the difference in temperature between first liquid mouth of battery package and the second liquid mouth, avoid constantly flowing the inside temperature imbalance of battery package that causes with a direction because of liquid in the pipeline.
In a further preferred embodiment, a radiator is attached to the heat exchanger. By installing the heat sink, the cooling effect on the battery pack can be accelerated.
Further as a preferred embodiment, the conduit is made of a good conductor of heat. The good heat conductor is copper or silver, the pipeline made of the materials has a good heat conduction function, heat exchange between liquid in the pipeline and the outside can be realized by utilizing the contact between the pipeline and the external environment such as air, and the heating or cooling efficiency of the battery pack is improved.
The embodiment further includes a battery thermal management system including the battery thermal balancing apparatus of the embodiment. Specifically, the battery thermal management system is realized by adding modules such as a liquid flow sensor, a cooling fan, a fan speed regulation circuit and the like on the basis of the battery thermal balance device, and the temperature control performance of the battery can be further improved on the basis of the beneficial effects of the battery thermal balance device in the embodiment.
The embodiment also comprises an automobile, wherein the battery thermal management system is arranged on the automobile, so that good temperature control management is provided for the storage battery arranged on the automobile.
It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Furthermore, the descriptions of upper, lower, left, right, etc. used in the present disclosure are only relative to the mutual positional relationship of the constituent parts of the present disclosure in the drawings. As used in this disclosure, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any combination of one or more of the associated listed items.
It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element of the same type from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present disclosure. The use of any and all examples, or exemplary language ("e.g.," such as, "etc.), provided herein is intended merely to better illuminate embodiments of the invention and does not pose a limitation on the scope of the invention unless otherwise claimed.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, as long as it achieves the technical effects of the present invention by the same means, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included within the scope of the present invention. The technical solution and/or the embodiments of the invention may be subject to various modifications and variations within the scope of the invention.
Claims (8)
1. A battery heat balance device is used for carrying out heat balance protection on a battery pack and is characterized by comprising a liquid tank, a water pump, a four-way valve, a first temperature sensor, a second temperature sensor and a four-way valve controller;
the four-way valve is respectively connected with the first opening of the liquid tank, the liquid inlet of the water pump, the liquid outlet of the water pump and the first liquid port of the battery pack through pipelines; the four-way valve is used for communicating a first opening of the liquid tank with a liquid inlet of the water pump and simultaneously communicating a liquid outlet of the water pump with a first liquid port of the battery pack, or communicating the first opening of the liquid tank with a liquid outlet of the water pump and simultaneously communicating the liquid inlet of the water pump with the first liquid port of the battery pack;
the second liquid port of the battery pack is connected with the second opening of the liquid tank through a pipeline;
the first temperature sensor is used for measuring the temperature of a pipeline connected with a first liquid port of the battery pack, and the second temperature sensor is used for measuring the temperature of a pipeline connected with a second liquid port of the battery pack; the first temperature sensor and the second temperature sensor are both connected with the four-way valve controller;
and the four-way valve controller is connected with the control end of the four-way valve.
2. The battery heat balancing apparatus of claim 1, wherein a heat exchanger is further connected between the four-way valve and the battery pack.
3. The battery heat balance device of claim 2, wherein the four-way valve is connected to a refrigerant inlet of the heat exchanger, the first fluid port of the battery pack is connected to a refrigerant outlet of the heat exchanger, and the heat medium inlet and the heat medium outlet of the heat exchanger are used for connecting to a heat medium supply device.
4. The battery heat balance device of claim 2, wherein the four-way valve is connected to a heat medium inlet of the heat exchanger, the first fluid port of the battery pack is connected to a heat medium outlet of the heat exchanger, and the refrigerant inlet and the refrigerant outlet of the heat exchanger are used for connecting to a refrigerant supply device.
5. The battery heat balancing apparatus of claim 4, wherein the heat exchanger is fitted with a heat sink.
6. The cell heat balance device of any one of claims 1-5, wherein the conduit is made of a good conductor of heat.
7. A battery thermal management system comprising a battery thermal balancing apparatus as claimed in any one of claims 1 to 6.
8. An automobile equipped with a battery thermal management system according to claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920603037.1U CN209843910U (en) | 2019-04-28 | 2019-04-28 | Battery heat balance device, battery thermal management system and automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920603037.1U CN209843910U (en) | 2019-04-28 | 2019-04-28 | Battery heat balance device, battery thermal management system and automobile |
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| CN209843910U true CN209843910U (en) | 2019-12-24 |
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| CN201920603037.1U Active CN209843910U (en) | 2019-04-28 | 2019-04-28 | Battery heat balance device, battery thermal management system and automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021104803A1 (en) | 2021-03-01 | 2022-09-01 | Bayerische Motoren Werke Aktiengesellschaft | Temperature control device for an electrical energy store of a motor vehicle, method for operating such a temperature control device and energy store |
-
2019
- 2019-04-28 CN CN201920603037.1U patent/CN209843910U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021104803A1 (en) | 2021-03-01 | 2022-09-01 | Bayerische Motoren Werke Aktiengesellschaft | Temperature control device for an electrical energy store of a motor vehicle, method for operating such a temperature control device and energy store |
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