CN216793827U - Battery shell and square-shell battery - Google Patents

Abstract

The utility model aims to provide a battery shell and a square-shell battery which have few heat transfer paths and strong heat dissipation at a battery cell level, and effectively improve the safety performance of the battery. The utility model provides a battery case includes U type shell, bottom plate and two end plates, include refrigerant passageway and heat superconducting pipeline on the U type shell, sealed heat transfer working medium that has in the heat superconducting pipeline, U type shell and bottom plate are connected and are formed both ends opening and hollow square shell, and two end plates set up respectively at the both ends of hollow square shell, the end plate with square shell sealing connection forms battery case. The utility model provides a square-shell battery, includes electric core, electrolyte and as above battery case, two end plates block up respectively and locate battery case's both ends opening part, electric core is arranged in battery case with connect in the cavity that the end plate encloses utmost point post on the end plate.

Description

Battery shell and square-shell battery

Technical Field

The utility model belongs to the field of lithium batteries, and particularly relates to a battery shell and a square-shell battery.

Background

In China, the new energy industry is rapidly developed along with the east wind encouraged by national policies, and secondary batteries such as lithium ion batteries and the like are widely applied. The square battery is formed by welding an upper cover plate and a light and thin aluminum shell as a shell, adding a battery core and electrolyte and sealing. However, the square battery core cannot effectively solve the heating problem, so that the service life of the battery is shortened if the square battery core is light, and the battery is prone to smoke, fire and even explode if the square battery core is heavy. In addition, the traditional square-shell battery needs to be cooled by other auxiliary materials or devices outside the battery, so that the heat dissipation path is long, the heat dissipation efficiency is reduced, and the heat dissipation cost is high.

The utility model provides a battery shell and a square-shell battery by adopting a high-efficiency heat transfer structure, which can reduce a heat dissipation path, realize strong heat dissipation at a battery core level and achieve the purpose of heat control at the battery core level.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a battery case and a square-shell battery with less heat transfer paths and strong heat dissipation at the cell level, which are used to solve the problems of cell performance degradation and even fire explosion caused by the failure of heat conduction in the closed battery, and solve the problems of low temperature in the battery and the failure of charging and discharging of the battery. The application of the battery shell greatly improves the heat dissipation and soaking capacity of the battery, meets the requirement of electric core level heat control, and solves the problems of excessive cost and overhigh cost of the auxiliary heat dissipation device of the battery.

In order to achieve the above and other related objects, the present invention provides a battery case, which includes a U-shaped case, a bottom plate, and two end plates, wherein the U-shaped case includes a coolant channel and a thermal superconducting pipeline, a heat transfer medium is sealed in the thermal superconducting pipeline, the U-shaped case is connected to the bottom plate to form a hollow square case with two open ends, the two end plates are respectively disposed at two ends of the hollow square case, and the end plates are hermetically connected to the square case to form the battery case.

Preferably, the refrigerant channel and the heat superconducting pipeline are expanded in a single surface and are expanded and protruded towards the outside of the shell.

Preferably, a refrigerant channel and a heat superconducting pipeline are distributed on one side surface of the U-shaped shell.

Preferably, refrigerant channels and heat superconducting pipelines are distributed on two side surfaces of the U-shaped shell.

Preferably, the refrigerant channel on the U-shaped shell surrounds the heat superconducting pipeline in a U shape.

Preferably, the coolant channel extends to the outside of the battery case to form a water inlet and a water outlet.

Preferably, each of the two end plates has a pole.

The utility model aims to provide a battery shell, which improves the soaking capacity and the temperature control capacity of a battery, meets the requirement of battery core level heat control and ensures that the battery is safer.

In order to achieve the above and other related objects, the present invention provides a square-casing battery, which includes a battery cell, an electrolyte and the battery casing as described above, wherein two end plates are respectively disposed at openings at two ends of the battery casing, and the battery cell is disposed in a cavity enclosed by the battery casing and the end plates and connected to a terminal post on the end plate.

Preferably, two utmost point posts on the end plate are first utmost point post and second utmost point post respectively, the electric core includes first utmost point ear and second utmost point ear, first utmost point post with the first utmost point ear of electric core is connected, second utmost point post with the second utmost point ear of electric core is connected.

The utility model has the beneficial effects that: the utility model adopts a high-efficiency heat transfer structure, provides a battery shell and a square-shell battery, can reduce a heat dissipation path, realizes the strong heat dissipation at a battery core level, achieves the purpose of controlling heat at the battery core level, and greatly improves the safety performance of the battery.

Drawings

Fig. 1 shows an exploded view of a battery case according to the present invention.

Fig. 2 is a perspective view showing the construction of a battery case according to the present invention.

Fig. 3 is an exploded view of the square can battery of the present invention.

In the figure: 10-battery shell, 1-U-shaped shell, 11-refrigerant channel, 12-heat superconducting pipeline, 13-first water inlet, 14-first water outlet, 15-second water inlet, 16-second water outlet, 2-first end plate, 21-explosion-proof valve, 22-first pole, 3-second end plate, 31-second pole, 4-bottom plate, 5-battery core, 51-first pole ear and 52-second pole ear.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be further described in detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for descriptive purposes only.

It should be noted that if the embodiments of the present invention refer to the description of "first", "second", etc., the description of "first", "second", etc. is used for descriptive purposes only and is not to be construed as indicating or implying only the relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings. As shown in fig. 1 and 2, a battery case 10 according to the present invention includes a U-shaped case 1, a first end plate 2, a second end plate 3, and a bottom plate 4, where the U-shaped case 1 includes a refrigerant channel 11 and a heat superconducting pipeline 12, a heat transfer working medium (not shown) is sealed in the heat superconducting pipeline 12, the U-shaped case 1 is connected with the bottom plate 4 to form a hollow square case with two open ends, the first end plate 2 and the second end plate 3 are respectively disposed at two ends of the hollow square case, and the first end plate 2 and the second end plate 3 are connected with the square case in a sealing manner to form the battery case 10.

It should be noted that the refrigerant channel 11 and the heat superconducting pipe 12 may be distributed on one large side of the U-shaped shell 1, or may be distributed on two large sides of the U-shaped shell 1. The heat transfer working medium filled in the heat superconducting pipeline 12 can be gas or liquid or a mixture of gas and liquid, such as water, oil, refrigerant and the like. The U-shaped shell 1 filled with the heat transfer working medium has the characteristics of heat absorption, high heat transfer rate and good soaking property. A refrigerant is introduced into the refrigerant channel 11 on the U-shaped shell 1, so that the heat spread on the U-shaped shell 1 can be continuously taken away, and the purpose of cooling is achieved; or hot water is introduced into the refrigerant channel 11, the U-shaped shell 1 absorbs heat in the hot water and transfers the heat to the U-shaped shell 1, so that the purpose of temperature rise is achieved; the refrigerant introduced into the refrigerant channel 11 may be gas or liquid or a mixture of gas and liquid. The refrigerant channel 11 surrounds the heat superconducting pipeline 12 in a U shape and extends out of the U-shaped shell 1 to form a first water inlet 13 and a first water outlet 14, and when the refrigerant channel 11 and the heat superconducting pipeline 12 are distributed on two large sides of the U-shaped shell, a second water inlet 15 and a second water outlet 16 are also formed. And the first end plate 2 and the second end plate 3 are respectively provided with a pole column, and the first end plate 2 and the second end plate 3 are positioned on two opposite side surfaces of the battery shell.

The utility model also provides a square-shell battery, as shown in fig. 3, the square-shell battery includes a battery cell 5, an electrolyte (not shown) and the battery case 10 as described above, a first end plate 2 and a second end plate 3 are respectively disposed at openings at two ends of the battery case 10, and the battery cell 5 is disposed in the battery case 10 and connected to a terminal post on the end plate.

It should be noted that the first end plate 2 is provided with a first pole 22 and an explosion-proof valve 21, the second end plate 3 is provided with a second pole 31, the battery cell 5 includes a first pole tab 51 and a second pole tab 52, the first pole tab 51 of the battery cell 5 is connected with the first pole 22, and the second pole tab 52 of the battery cell 5 is connected with the second pole 31.

In summary, the present invention provides a battery case and a square-shell battery, wherein the battery case includes a U-shaped shell, a bottom plate and two end plates, the U-shaped shell includes a coolant channel and a thermal superconducting pipeline, a heat transfer medium is sealed in the thermal superconducting pipeline, the U-shaped shell is connected with the bottom plate to form a hollow square shell with two open ends, the two end plates are respectively disposed at two ends of the hollow square shell, and the end plates are connected with the square shell to form the battery case. The battery shell has the characteristics of high heat conduction rate, good temperature uniformity and rapid heat exchange. The square-shell battery comprises electrolyte, an electric core and the battery shell, and the integration of hot tide to a pipeline and a refrigerant channel is realized on the battery shell, so that the heat transfer path is reduced, the temperature control of the square-shell battery is more accurate, and the purpose of electric core level heat control is achieved.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and scope of the present invention as defined by the appended claims.

Claims (9)

1. The battery shell is characterized by comprising a U-shaped shell, a bottom plate and two end plates, wherein the U-shaped shell comprises a refrigerant channel and a heat superconducting pipeline, a heat transfer working medium is sealed in the heat superconducting pipeline, the U-shaped shell is connected with the bottom plate to form a hollow square shell with two open ends, the two end plates are respectively arranged at two ends of the hollow square shell, and the end plates are connected with the square shell in a sealing mode to form the battery shell.

2. The battery case as set forth in claim 1, wherein the coolant channel and the heat superconducting pipe are expanded on one side and protrude outward from the case.

3. The battery casing as recited in claim 1, wherein the U-shaped shell has a coolant channel and a thermal superconducting conduit distributed on one large side.

4. The battery case as set forth in claim 1, wherein the refrigerant channel and the thermal superconducting conduit are distributed on both large sides of the U-shaped case.

5. The battery casing as claimed in claim 3 or 4, wherein the coolant channel on the U-shaped casing is U-shaped to surround the thermal superconducting pipeline.

6. The battery case of claim 5, wherein the coolant channel extends outside the battery case to form a water inlet and a water outlet.

7. The battery housing of claim 6, wherein each of the two end plates has a post.

8. A square-shell battery, comprising a battery cell, an electrolyte and the battery casing as claimed in any one of claims 1 to 7, wherein two end plates are respectively disposed at openings at two ends of the battery casing, and the battery cell is disposed in a cavity enclosed by the battery casing and the end plates and connected to a terminal post on the end plate.

9. The square-shell battery according to claim 8, wherein the two terminal posts on the end plates are a first terminal post and a second terminal post respectively, the battery core comprises a first tab and a second tab, the first terminal post is connected with the first tab, and the second terminal post is connected with the second tab.

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