CN210403971U

CN210403971U - Temperature-controllable heating unit of lithium battery

Info

Publication number: CN210403971U
Application number: CN201921324373.9U
Authority: CN
Inventors: 叶林
Original assignee: Anhui Wuxing Power New Energy Co ltd
Current assignee: Anhui Wuxing Power New Energy Co ltd
Priority date: 2019-08-15
Filing date: 2019-08-15
Publication date: 2020-04-24
Anticipated expiration: 2029-08-15

Abstract

The utility model discloses a temperature-controllable heating unit of a lithium battery, which comprises a battery box, wherein the top end of the battery box is provided with a placement opening and a battery box cover, the size of the placing opening is consistent with that of the battery box, the placing opening is matched with the battery box cover, the placing opening and the battery box cover are fixedly connected in a welding mode, the material of the battery box cover is consistent with that of the battery box, a plurality of lithium battery plates are fixedly connected inside the battery box, a temperature guide plate is fixedly connected between every two lithium battery plates, the outer side of the battery box is fixedly connected with a temperature control ring, the outer side of the temperature control ring is fixedly connected with a plurality of thermoelectric refrigerating sheets, the thermoelectric refrigeration piece is connected with the temperature control closed-loop controller in series, and the temperature control heating unit can keep the activity of the lithium battery at a low temperature and prevent the lithium battery from aging when the temperature of the lithium battery is too high.

Description

Temperature-controllable heating unit of lithium battery

Technical Field

The utility model relates to a lithium cell technical field specifically is a lithium cell controllable temperature heating unit.

Background

"lithium batteries" are batteries using a nonaqueous electrolyte solution and using lithium metal or a lithium alloy as a negative electrode material, and are roughly classified into two types: lithium metal batteries and lithium ion batteries. The lithium ion battery does not contain metallic lithium and can be charged, the application of the lithium ion battery is wider at present, the application of the lithium metal battery is not common due to the high cost and the high technical difficulty of the lithium metal battery, nowadays, in order to respond to the national call, more and more new energy automobiles are pursued in the market, the core of the new energy automobiles is the lithium battery, but the activity of the lithium battery is influenced by the temperature, the optimal use temperature of the common automobile lithium battery is between 0 and 40 ℃, the common temperature in cold winter is lower, the activity of the lithium battery is influenced, in order to avoid reducing the cruising ability of the new energy automobiles, a heating unit is generally added between lithium battery plates, the heating unit can provide proper temperature for the lithium battery when the external temperature is lower, but the temperature of the common lithium battery heating unit cannot be regulated and controlled, when the lithium cell was used in the circular telegram, because of the reason that self electricity generated heat, the temperature of lithium cell can continue to rise and improve, if the high temperature of lithium cell, can accelerate the ageing of lithium cell, increase the change frequency of lithium cell, cause the pollution of environment, the temperature of lithium cell is low excessively, can influence the activity of lithium cell again, so the urgent need one kind can carry out the heating element of management and control to the temperature of lithium cell.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lithium cell controllable temperature heating unit to the lithium cell that proposes in solving above-mentioned background art reduces in activity when temperature is lower, is unfavorable for the normal charge and discharge work of lithium cell, will accelerate the ageing problem of lithium cell when the lithium cell high temperature.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a controllable temperature heating element of lithium cell, includes the battery case, a plurality of lithium cell boards of inside fixedly connected with of battery case, per two fixedly connected with leads the temperature board between the lithium cell board, the outside fixedly connected with control by temperature change ring of battery case, a plurality of thermoelectric refrigeration pieces of outside fixedly connected with of control by temperature change ring, thermoelectric refrigeration piece series connection electric connection has the control by temperature change closed-loop controller.

Preferably, battery case and lead warm board and control by temperature change ring and be the aluminium metal material, just lead the outside and the integrative setting of control by temperature change ring that the both ends of warm board extended to the battery case, lead the figure and a plurality of lithium battery board clearance number phase-match of warm board, and the space between two lead warm boards matches with the lithium battery board.

Preferably, a heat preservation belt is arranged between the battery box and the temperature control ring, the heat preservation belt is made of a foamed polyurethane material, and the size of the heat preservation belt is matched with that of the temperature control ring.

Preferably, a plurality of thermoelectric refrigeration pieces are welded on the outer side of the temperature control ring and are electrically connected in parallel, the temperature control closed-loop controller is electrically connected with the power supply and the thermoelectric refrigeration pieces in parallel, and the temperature sensing antenna of the temperature control closed-loop controller is fixedly connected to the inner wall of the battery box.

Preferably, the top end of the battery box is provided with a placement opening and a battery box cover, the placement opening is consistent with the size of the battery box, the placement opening is matched with the battery box cover, the placement opening and the battery box cover are fixedly connected in a welding mode, and the battery box cover is consistent with the battery box in material.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses, through be provided with one deck heat preservation area between battery case and control by temperature change ring, can reduce the influence of external environment to the inside temperature of battery case to can reduce thermal loss when heating the lithium cell board.

2. Because the material of battery case is the aluminium metal material, utilizes the good ductility of aluminium metal material, can reduce the injury that causes the external environment when the lithium cell board explodes, leads temperature board and control by temperature change ring and adopts the aluminium metal material to utilize the good heat conductivity of aluminium metal material, can enough accelerate the heat transfer between inside and the battery case outside of heat battery case, can strengthen the anti riot effect of battery case again.

Drawings

FIG. 1 is a schematic view of a battery case according to an embodiment of the present invention;

fig. 2 is a schematic view of a temperature control loop structure according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a circuit connection between the thermoelectric cooling plate and the temperature control closed-loop controller according to the embodiment of the present invention.

In the figure: 1. a battery case; 11. a heat preservation belt; 12. a placement port; 13. a battery case cover; 2. a lithium battery panel; 3. a heat conducting plate; 4. a temperature control ring; 5. a thermoelectric refrigeration chip; 6. a temperature control closed-loop controller.

Detailed Description

In order to keep the activity of the lithium battery at a low temperature and prevent the aging of the lithium battery from being accelerated due to the overhigh temperature of the lithium battery, the temperature-controllable heating unit of the lithium battery is particularly provided. The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Referring to fig. 1-3, the present embodiment provides a temperature-controllable heating unit for a lithium battery, including a battery box 1, a plurality of lithium battery panels 2 are fixedly connected to the inside of the battery box 1, a temperature-guiding plate 3 is fixedly connected between every two lithium battery panels 2, the battery box 1, the temperature-guiding plate 3 and a temperature control ring 4 are made of aluminum metal, the battery box 1 is made of aluminum metal, since the battery box 1 is made of aluminum metal, the damage to the external environment caused by the explosion of the lithium battery panels 2 can be reduced by using the excellent ductility of the aluminum metal, the temperature-guiding plate 3 and the temperature control ring 4 are made of aluminum metal, the heat transfer between the inside of the heat battery box 1 and the outside of the battery box 1 can be accelerated, the anti-explosion effect of the battery box 1 can be enhanced, and the two ends of the temperature-guiding plate 3 extend to the outside of the battery box 1 and are integrated with the temperature control ring 4, the number of the temperature guide plates 3 is matched with the number of gaps between a plurality of lithium battery plates 2, a gap between two temperature guide plates 3 is matched with the lithium battery plates 2, the outer side of the battery box 1 is fixedly connected with a temperature control ring 4, the outer side of the temperature control ring 4 is fixedly connected with a plurality of thermoelectric refrigerating sheets 5, the thermoelectric refrigerating sheets 5 are electrically connected in series with a temperature control closed-loop controller 6, the thermoelectric refrigerating sheets 5 are welded on the outer side of the temperature control ring 4, the thermoelectric refrigerating sheets 5 are electrically connected in parallel, the temperature control closed-loop controller 6 is electrically connected with a power supply and the thermoelectric refrigerating sheets 5 in parallel, a temperature sensing feeler of the temperature control closed-loop controller 6 is fixedly connected with the inner wall of the battery box 1, when the lithium battery plates 2 are installed, the lithium battery plates 2 only need to be inserted into the gaps between the temperature guide plates 3, and after the lithium battery plates 2 are installed, the battery box cover 13 is welded and fixed with the installation opening, the model of the thermoelectric refrigerating sheet 5 is TEC1-12726, the model of the temperature control closed-loop controller 6 is OHR-A303D-02-K4/X-A, the thermoelectric refrigerating sheet 5 and the temperature control closed-loop controller 6 are both existing, the wiring mode is the known prior art, the temperature control closed-loop controller 6 can set an initial temperature value according to the environment where the battery box 1 is located, the temperature control closed-loop controller 6 needs to set an initial value, a steady state value and an alarm value, when the temperature is below the initial value, a circuit of the temperature control closed-loop controller 6 is conducted, at the moment, the thermoelectric refrigerating sheet 5 starts to work in a forward direction, the side in contact with the temperature control loop 4 starts to heat, the temperature control loop 4 conducts heat to the temperature guide plate 3, the temperature guide plate 3 heats the lithium battery plate 2, and when the temperature of the lithium battery plate 2 reaches the steady state value, the temperature control closed-loop controller 6 controls the thermoelectric refrigerating sheet 5 to stop working, when the temperature of the lithium battery plate 2 is over high due to the self electric heating effect, the temperature is usually 70 ℃, the power contact of the temperature control closed-loop controller 6 deflects, the positive and negative poles of the current flowing through the thermoelectric cooling plate 5 are further reversed, namely, the side, in contact with the temperature control loop 4, of the thermoelectric cooling plate 5 starts to refrigerate, and the purpose of cooling the lithium battery plate 2 is further achieved.

In this embodiment, be provided with heat preservation area 11 between battery case 1 and the control by temperature change ring 4, heat preservation area 11 material is foaming polyurethane material, the size of heat preservation area 11 and the size phase-match of control by temperature change ring 4, through be provided with one deck heat preservation area 11 between battery case 1 and control by temperature change ring 4, can reduce the influence of external environment to the inside temperature of battery case 1 to can reduce thermal loss when heating lithium cell board 2, settle mouth 12 and battery box lid 13 has been seted up on the top of battery case 1, it is unanimous with battery case 1 size to settle mouth 12, settle mouth 13 phase-match of battery box lid, it is fixed with battery box lid 13 adoption welding mode to settle mouth 12, the material of battery box lid 13 is unanimous with battery case 1, further promotion whole battery case 1's blast proof ability.

In the description of the present application, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

In the description of the present application, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, a connection through an intermediate medium, and a connection between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to specific circumstances.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a controllable temperature heating element of lithium cell, includes battery case (1), its characterized in that: the battery pack is characterized in that a plurality of lithium battery boards (2) are fixedly connected to the inside of the battery box (1), every two temperature guide plates (3) are fixedly connected between the lithium battery boards (2), a temperature control ring (4) is fixedly connected to the outer side of the battery box (1), a plurality of thermoelectric refrigerating fins (5) are fixedly connected to the outer side of the temperature control ring (4), and the thermoelectric refrigerating fins (5) are electrically connected in series with a temperature control closed-loop controller (6).

2. The controllable temperature heating unit of lithium battery as claimed in claim 1, wherein: battery case (1) and lead temperature board (3) and control by temperature change ring (4) and be the aluminium metal material, just the both ends of leading temperature board (3) extend to the outside of battery case (1) and the integrative setting of control by temperature change ring (4), lead the figure and a plurality of lithium cell board (2) clearance number phase-match of temperature board (3), and lead space and lithium cell board (2) phase-match between temperature board (3) for two.

3. The controllable temperature heating unit of lithium battery as claimed in claim 1, wherein: be provided with heat preservation area (11) between battery case (1) and control by temperature change ring (4), heat preservation area (11) material is foaming polyurethane material, the size of heat preservation area (11) and the size phase-match of control by temperature change ring (4).

4. The controllable temperature heating unit of lithium battery as claimed in claim 1, wherein: the thermoelectric refrigerating piece (5) is welded on the outer side of the temperature control ring (4) and is in parallel electric connection with the thermoelectric refrigerating piece (5), the temperature control closed-loop controller (6) is in parallel electric connection with the power supply and the thermoelectric refrigerating piece (5), and the temperature sensing antenna of the temperature control closed-loop controller (6) is fixedly connected on the inner wall of the battery box (1).

5. The controllable temperature heating unit of lithium battery as claimed in claim 1, wherein: settle mouth (12) and battery box lid (13) have been seted up on the top of battery box (1), it is unanimous with battery box (1) size to settle mouth (12), settle mouth (12) and battery box lid (13) phase-match, it adopts the welding mode to be connected fixedly to settle mouth (12) and battery box lid (13), the material and the battery box (1) of battery box lid (13) are unanimous.