Battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack. The battery pack comprises a bottom plate and a baffle, the bottom plate is used for bearing a battery pack, and the battery pack is connected with the bottom plate through a first adhesive layer; the baffle is arranged at one end of the battery pack to divide the bottom plate into two containing spaces, the battery pack is arranged in one containing space, a notch is formed in the side, close to the bottom plate, of the baffle in the direction perpendicular to the bottom plate, and the notch communicates with the two containing spaces to form a glue overflowing channel of the first glue layer. A second adhesive layer is arranged in the accommodating space on one side, close to the battery pack, of the baffle and covers the battery pack. According to the utility model, the baffle with the notch is arranged at one end of the battery pack, so that more space is provided for overflow of the first adhesive layer; in addition, the battery pack is coated with the second adhesive layer, and the baffle is arranged to be beneficial to preventing the second adhesive layer from overflowing, so that the state of other components arranged on one side, far away from the battery pack, of the baffle is ensured, and the reliability of normal use of the battery pack is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery pack. BACKGROUND

[0002] In prior art, battery pack is usually connected with the bottom plate of battery box through the form of adhesion. But in the process of adhesion of battery pack, overflow problem is prone to appear due to excessive extrusion, and then partial glue layer is too thick, which not only affects the flatness of battery pack, but also leads to unbalanced structural strength of battery pack. In addition, glue overflow problem is also prone to appear in the process of adhesion between each battery column in battery pack, and the overflowed glue can affect the state of other components in battery pack and affect the normal use of battery pack.

[0003] Therefore, an urgent need exists for a battery pack to solve the above problems. UTILITY MODEL CONTENTS

[0004] Based on the above, the utility model aims at providing a battery pack, which can provide overflow space for the first glue layer and effectively block the second glue layer.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] The battery pack comprises:

[0007] A bottom plate is used for bearing battery pack, and the battery pack is connected with the bottom plate through the first glue layer;

[0008] A baffle is arranged at one end of the battery pack to divide the bottom plate into two containing spaces, the battery pack is arranged in one of the containing spaces, the baffle is provided with a notch on the side close to the bottom plate in the direction perpendicular to the bottom plate, the notch is communicated with the two containing spaces to form an overflow channel of the first glue layer, and the containing space on the side close to the battery pack of the baffle is provided with the second glue layer, and the second glue layer covers the battery pack.

[0009] The utility model has the advantages of:

[0010] The utility model discloses a bottom plate is set up for bearing battery group, and battery group is bonded with the bottom plate through the first adhesive layer. The bottom plate is divided into two containing spaces through setting the baffle at one end of battery group, and battery group is arranged in one containing space, and the notch of the overflow channel of the first adhesive layer is set on the end of the baffle close to the bottom plate, and the notch is communicated with two containing spaces, and can provide more space for the overflow of the first adhesive layer, so that the glue of the excess first adhesive layer between battery group and the bottom plate can flow out from the baffle more quickly and smoothly, avoids the problem of the first adhesive layer being too thick caused by the excessive extrusion of the first adhesive layer, effectively guarantees the flatness of battery pack, and makes the structural strength of battery pack more balanced. In addition, battery group is coated with the second adhesive layer, and the setting of the baffle is also favorable for blocking the overflow of the second adhesive layer, so that the second adhesive layer only exists in the containing space on the side of the baffle close to battery group, guarantees the state of other components arranged on the side of the baffle away from battery group, and guarantees the reliability of normal use of battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed to be used in the embodiment of the utility model will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the content of the embodiment of the utility model and these drawings without the creative labor of the ordinary skilled in the art.

[0012] Figure 1 It is the schematic diagram of battery pack provided by the embodiment of the utility model.

[0013] Figure 2 It is Figure 1 The local enlarged schematic diagram of A in

[0014] Figure 3 It is the structural schematic diagram of battery pack after hiding one side side plate and part structure provided by the embodiment of the utility model.

[0015] Figure 4 It is Figure 3 The local enlarged schematic diagram of B in

[0016] Figure 5 It is the schematic diagram of the baffle of battery pack provided by the embodiment of the utility model.

[0017] In the drawing:

[0018] 110, bottom plate; 111, tray; 112, uniform temperature plate; 120, side plate; 121, electrical bin;

[0019] 200, battery pack; 210, battery column; 220, cold plate; 221, confluence part; 222, distribution part; 230, flexible flat cable; 240, bus bar; 250, connector;

[0020] 300, baffle; 310, notch; 320, flange; 321, first avoiding gap; 330, second avoiding gap;

[0021] 400, glue blocking strip. DETAILED DESCRIPTION

[0022] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0023] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0024] Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" should be understood broadly, for example, can be fixedly connected, can also be detachably connected; can be mechanically connected, can also be electrically connected; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] like Figures 1-5 As shown, this embodiment provides a battery pack, which includes a base plate 110 and a baffle 300. The base plate 110 is used to support a battery pack 200, and the battery pack 200 is connected to the base plate 110 by a first adhesive layer. The baffle 300 is disposed at one end of the battery pack 200 to divide the base plate 110 into two receiving spaces. The battery pack 200 is disposed in one of the receiving spaces. The baffle 300 has a notch 310 on the side of the base plate 110 that is perpendicular to the base plate 110. The notch 310 connects the two receiving spaces to form an overflow channel for the first adhesive layer. The receiving space on the side of the baffle 300 that is close to the battery pack 200 is provided with a second adhesive layer, which covers the battery pack 200.

[0028] A base plate 110 is provided to support the battery pack 200, and the battery pack 200 is bonded to the base plate 110 by a first adhesive layer. A baffle 300 is provided at one end of the battery pack 200 to divide the base plate 110 into two receiving spaces. The battery pack 200 is placed in one of the receiving spaces. A notch 310 is provided at the end of the baffle 300 near the base plate 110 to form an overflow channel for the first adhesive layer. The notch 310 connects the two receiving spaces, providing more space for the overflow of the first adhesive layer. This allows excess adhesive from the first adhesive layer between the battery pack 200 and the base plate 110 to flow out of the base plate 110 more quickly and smoothly, avoiding the problem of the first adhesive layer becoming too thick due to excessive compression. This effectively ensures the overall flatness of the battery pack and makes the structural strength of the battery pack more balanced. In addition, the battery pack 200 is covered with a second adhesive layer, and the baffle 300 is designed to prevent the second adhesive layer from overflowing. This ensures that the second adhesive layer exists only in the accommodating space on the side of the baffle 300 closest to the battery pack 200, thus protecting the status of other components located on the side of the baffle 300 away from the battery pack 200 and ensuring the reliability of the battery pack during normal use.

[0029] Optionally, the first adhesive layer is configured as a structural adhesive, which is an adhesive capable of bearing strong structural bonding, and has advantages of aging resistance, fatigue resistance, corrosion resistance, stable performance within the expected service life, etc. The structural adhesive is used to fix the battery pack 200 and the bottom plate 110 to realize the connection between the battery pack 200 and the bottom plate 110. The second adhesive layer is configured as a foaming adhesive. The foaming adhesive after curing has multiple effects such as caulking, bonding, sealing, and heat insulation, and is used to bond the inside of the battery pack 200 to connect the whole of the accommodating space provided with the battery pack 200. The gap 310 can realize the overflow effect of the structural adhesive with a certain fluidity. The baffle 300 can be used to block the overflow of the foaming adhesive during the foaming process, so that the foaming adhesive can only expand on the side of the baffle 300 close to the battery pack 200, thereby improving the bonding, insulation, and heat insulation effects of the foaming adhesive on the inside of the battery pack 200.

[0030] Preferably, the baffle 300 is higher than the top surface of the second adhesive layer by a preset height, and the preset height is 3-5 mm. When the top surface of the second adhesive layer is too far below the upper edge of the baffle 300, it means that the potting height of the foaming adhesive is not enough, and cannot play a better insulation and heat insulation role. When the top surface of the second adhesive layer is too close to the upper edge of the baffle 300, the blocking space of the baffle 300 for the second adhesive layer is not enough, and cannot better realize the blocking effect. Exemplarily, the preset height can be set to 3.5 mm, 4 mm, 4.5 mm, or other values within the range of 3-5 mm.

[0031] Optionally, the thickness of the baffle 300 is 1.1-1.3 mm, which is conducive to improving the lightweight degree while ensuring a certain supporting strength. Exemplarily, the thickness of the baffle 300 can be set to 1.15 mm, 1.2 mm, 1.25 mm, or other values within the range of 1.1-1.3 mm.

[0032] In this embodiment, the battery pack 200 includes a plurality of battery columns 210 arranged side by side along a first direction, and the baffle 300 is arranged at one end of the battery pack 200 along a second direction. The second direction is arranged perpendicularly to the first direction, and both are perpendicular to the height direction of the battery pack. A cold plate 220 is arranged between adjacent battery columns 210, and the cold plate 220 is used to cool the adjacent two battery columns 210 to ensure that the overall temperature of the battery pack 200 is not too high, thereby improving the reliability during use of the battery pack. The battery column 210 is arranged perpendicularly to the bottom plate 110, so the cold plate 220 is arranged perpendicularly to the bottom plate 110, which is conducive to improving the adhesion between the cold plate 220 and the battery column 210 and improving the cooling effect.

[0033] Further, a ratio of a height of the cold plate 220 along a direction perpendicular to the bottom plate 110 to a height of the notch 310 along the direction perpendicular to the bottom plate 110 is set to 1.03-1.1. It should be noted that the baffle plate 300 is inserted and installed along the direction perpendicular to the bottom plate 110 after the battery pack 200 is assembled with the bottom plate 110, until the cold plate 220 abuts against an end of the bottom plate 110 away from the notch 310, and thus the ratio of the height of the cold plate 220 to the height of the notch 310 affects the distance between the baffle plate 300 and the bottom plate 110. When the ratio of the height of the cold plate 220 to the height of the notch 310 is too small, the distance between the baffle plate 300 and the bottom plate 110 is too small, which is not conducive to the glue flow of the first glue layer; when the ratio of the height of the cold plate 220 to the height of the notch 310 is too large, the distance between the baffle plate 300 and the bottom plate 110 is too large, and thus the second glue layer may flow out of the notch 310, affecting the blocking of the second glue layer by the baffle plate 300. Exemplarily, the ratio of the height of the cold plate 220 to the height of the notch 310 can be set to 1.04, 1.05, 1.06, 1.07, 1.08, 1.09, or other values within the range of 1.03-1.1.

[0034] Specifically, the cold plate 220 is partially arranged in the notch 310, that is, the cold plate 220 is provided with a converging portion 221 and a diverging portion 222. The diverging portion 222 is arranged between adjacent battery columns 210, for cooling the battery columns 210. The converging portion 221 is in communication with the diverging portion 222, for conveying cooling water to the diverging portion 222 and discharging the cooling water in the diverging portion 222. A small part of the diverging portion 222 is arranged at an end of the baffle plate 300 away from the battery pack 200 after passing through the notch 310. The parts of the plurality of diverging portions 222 passing through the notch 310 are connected to the converging portion 221. In this way, the diverging portion 222 is connected to the converging portion 221, and the converging portion 221 is arranged at the side of the baffle plate 300 away from the battery pack 200, so that the space in the battery pack is optimized and rationalized. The position of the diverging portion 222 not in contact with the battery pack 200 is covered with the second glue layer, which is conducive to reducing heat transfer at this position and improving the heat exchange efficiency of the cold plate 220. The converging portion 221 is not provided with the second glue layer, which can quickly reduce the temperature of the liquid entering the diverging portion 222 and improve the heat exchange efficiency.

[0035] Further, the baffle 300 is provided with a flange 320 at one end thereof away from the bottom plate 110 in the vertical direction of the bottom plate 110, the flange 320 extends towards the side away from the battery pack 200, and the battery pack is further provided with an electrical connection device, which is electrically connected with the battery pack 200 and connected with the flange 320. That is, the flange 320 realizes the mounting and fixing of the electrical connection device, and the fixing mode can be realized by using fasteners such as screws. Exemplarily, the electrical connection device includes a flexible flat cable 230 and a connector 250, and the flexible flat cable 230 is located at the side of the battery pack 200 away from the bottom plate 110, and the end thereof is arranged at the side of the flange 320 away from the bottom plate 110, and the connector 250 is arranged at the side of the flange 320 close to the bottom plate 110 and electrically connected with the flexible flat cable 230. Correspondingly, the flange 320 is provided with a first avoiding gap 321 to avoid interference of the flange 320 with the connection of the connector 250 and the flexible flat cable 230. The first avoiding gap 321 is provided with a plurality of gaps and is arranged in correspondence with the arrangement position of the flexible flat cable 230. Further, the battery pack is further provided with a busbar 240, which is electrically connected with the battery pack 200 and arranged at both ends in the first direction, and the baffle 300 is provided with a second avoiding gap 330 to avoid interference of the baffle 300 with the connection of the busbar 240 and the battery pack 200. The principles and mounting of the above-mentioned flexible flat cable 230 and busbar 240 are prior art and are not limited here.

[0036] In the embodiment, the busbar portion 221 is arranged between the flange 320 and the bottom plate 110, the space utilization is more reasonable, and the busbar portion 221 is also protected to a certain extent.

[0037] Specifically, the battery pack is further provided with a side plate 120, which is arranged on the bottom plate 110 and arranged in the circumferential direction of the battery pack 200, for forming a battery box, and the baffle 300 is arranged in the battery box, so that two accommodating spaces are formed in the inside of the battery box, and the accommodating space in which the battery pack 200 is arranged is a battery compartment for protecting the battery pack 200 and facilitating the mounting of the battery pack 200. The accommodating space at the side of the baffle 300 away from the battery pack 200 is an electrical compartment 121 for arranging various components required for normal use of the battery pack, such as the busbar portion 221 of the cold plate 220, the connector 250, the circuit board, the circuit breaker, the controller, etc. The arrangement of the baffle 300 is beneficial to separating the above-mentioned various components from the battery pack 200, optimizes the layout of the battery box, and makes the structure more optimized and reasonable.

[0038] In the embodiment, the battery pack further comprises a glue blocking strip 400, which is arranged on the side of the baffle 300 away from the battery group 200, and is used for blocking the gap on the side of the baffle 300 close to the bottom plate 110. The arrangement of the glue blocking strip 400 effectively blocks the space on the side of the baffle 300 close to the bottom plate 110, so as to avoid the second glue layer from entering the gap.

[0039] Exemplarily, the battery pack further comprises a tray 111 and a uniform temperature plate 112, the tray 111 is arranged on the bottom plate 110, the uniform temperature plate 112 is arranged on the side of the tray 111 away from the bottom plate 110, and the battery group 200 is arranged on the uniform temperature plate 112, and the baffle 300 and the glue blocking strip 400 are also arranged on the uniform temperature plate 112. It can be understood that the above-mentioned gap is the gap between the side of the baffle 300 close to the bottom plate 110 and the uniform temperature plate 112. Preferably, the cross section of the glue blocking strip 400 is rectangular, one side wall of the rectangular glue blocking strip 400 is connected with the side of the baffle 300 away from the battery group 200, and the other side wall adjacent to the side is connected with the uniform temperature plate 112.

[0040] The embodiment further discloses a power utilization device comprising the battery pack according to any one of the above-mentioned solutions. Exemplarily, the power utilization device can be an electric vehicle or an electric forklift. It should be pointed out that the above-mentioned battery pack is not provided with a cross beam, that is, the arrangement of the baffle 300 not only provides an overflow space for the first glue layer and blocks the second glue layer, but also improves the structural strength of the battery pack, and realizes the installation of the internal components of the battery pack, so as to simplify the structure of the battery pack.

[0041] The above-mentioned is only the preferred embodiment of the present application, and for the ordinary skilled in the art, according to the idea of the present application, the specific embodiment and the application range can be changed, and the content of the specification should not be understood as the limitation of the present application.

Claims

1. A battery pack, characterized by, The application relates to a battery pack, comprising: a bottom plate (110) for carrying a battery group (200), wherein the battery group (200) and the bottom plate (110) are connected through a first adhesive layer; a baffle plate (300) arranged at one end of the battery group (200) to divide the bottom plate (110) into two containing spaces, the battery group (200) is arranged in one of the containing spaces, and a notch (310) is arranged on the side of the baffle plate (300) close to the bottom plate (110) in a direction perpendicular to the bottom plate (110), the notch (310) is communicated with the two containing spaces to form an overflow channel of the first adhesive layer, and a second adhesive layer is arranged on the side of the baffle plate (300) close to the containing space of the battery group (200), and the second adhesive layer covers the battery group (200).

2. The battery pack of claim 1, wherein, The battery group (200) comprises a plurality of battery columns (210) arranged side by side in a first direction, and a cold plate (220) perpendicular to the bottom plate (110) is arranged between adjacent battery columns (210), the cold plate (220) is partially arranged in the notch (310), and the height of the cold plate (220) in the direction perpendicular to the bottom plate (110) is 1.03-1.1 times the height of the notch (310) in the direction perpendicular to the bottom plate (110).

3. The battery pack of claim 2, wherein, The cold plate (220) is provided with a converging portion (221) and a diverging portion (222), the converging portion (221) is arranged on the side of the baffle plate (300) away from the battery group (200), the diverging portion (222) is arranged between adjacent battery columns (210), and the diverging portion (222) is at least partially covered by the second adhesive layer.

4. The battery pack of claim 3, wherein, The baffle plate (300) is provided with a flange (320) at the end away from the bottom plate (110) in the direction perpendicular to the bottom plate (110), the flange (320) extends towards the side away from the battery group (200), and the converging portion (221) is arranged between the flange (320) and the bottom plate (110).

5. The battery pack of any one of claims 1-4, wherein, The baffle plate (300) is provided with a flange (320) at the end away from the bottom plate (110), and the battery pack is further provided with an electrical connection device, the electrical connection device is electrically connected with the battery group (200) and connected with the flange (320).

6. The battery pack of any one of claims 1-4, wherein, The battery pack is further provided with side plates (120), the side plates (120) are arranged on the bottom plate (110) and arranged in the circumferential direction of the battery group (200), and the side of the baffle plate (300) away from the battery group (200) and the side plates (120) surround an electrical compartment (121).

7. The battery pack of any one of claims 1-4, wherein, The first adhesive layer is structural adhesive, and the second adhesive layer is foaming adhesive.

8. The battery pack of any one of claims 1-4, wherein, The baffle plate (300) is higher than the top surface of the second adhesive layer by a preset height, and the preset height is 3-5 mm.

9. The battery pack of any one of claims 1-4, wherein, The thickness of the baffle plate (300) is 1.1-1.3 mm.

10. The battery pack of any one of claims 1-4, wherein, The battery pack further comprises a glue blocking strip (400) arranged on the side of the baffle (300) away from the battery group (200) to block the gap on the side of the baffle (300) close to the bottom plate (110).

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